Biggest changeThe presentation of these non-GAAP financial measures is not intended to be considered in isolation from, as a substitute for, or superior to the financial information prepared and presented in accordance with GAAP, and our non-GAAP measures may be different from non-GAAP measures used by other companies. 57 The following tables reconcile our non-GAAP measures to their nearest comparable GAAP measures (in thousands, except per share data): GAAP Measure Stock-Based Compensation Litigation Expense JPI Amortization Severance Costs Non-GAAP Measure Year Ended December 31, 2023 Subscriptions cost of revenue $ 43,563 $ (925) $ — $ — $ (30) $ 42,608 Professional services cost of revenue 99,759 (6,055) — — (158) 93,546 Total cost of revenue 143,322 (6,980) — — (188) 136,154 Total operating expense 510,014 (36,407) 2,064 (6,038) (6,111) 463,522 Operating loss (107,973) 43,387 (2,064) 6,038 6,299 (54,313) Income tax expense 3,209 1,302 — — 139 4,650 Net loss (111,441) 42,085 (2,064) 6,038 6,160 (59,222) Net loss per share, basic and diluted $ (1.52) $ 0.58 $ (0.03) $ 0.08 $ 0.08 $ (0.81) Year Ended December 31, 2022 Subscriptions cost of revenue $ 36,005 $ (996) $ — $ — $ — $ 35,009 Professional services cost of revenue 97,301 (5,309) — — — 91,992 Total cost of revenue 133,306 (6,305) — — — 127,001 Total operating expense 479,695 (32,525) (22,886) — — 424,284 Operating loss (145,010) 38,830 22,886 — — (83,294) Net loss (150,920) 38,830 22,886 — — (89,204) Net loss per share, basic and diluted $ (2.08) $ 0.54 $ 0.32 $ — $ — $ (1.23) Year Ended December 31, 2021 Subscriptions cost of revenue $ 27,330 $ (1,199) $ — $ — $ — $ 26,131 Professional services cost of revenue 76,763 (3,131) — — — 73,632 Total cost of revenue 104,093 (4,330) — — — 99,763 Total operating expense 349,073 (19,514) (16,400) — — 313,159 Operating loss (83,907) 23,844 16,400 — — (43,663) Net loss (88,641) 23,844 16,400 — — (48,397) Net loss per share, basic and diluted $ (1.25) $ 0.34 $ 0.23 $ — $ — $ (0.68) 58 The following table reconciles GAAP net loss to adjusted EBITDA for the years ended December 31, 2023, 2022, and 2021 (in thousands): Year Ended December 31, 2023 2022 2021 GAAP net loss $ (111,441) $ (150,920) $ (88,641) Other (income) expense, net (17,603) 3,545 3,584 Interest expense 17,862 1,673 372 Income tax expense 3,209 692 778 Depreciation expense and amortization of intangible assets 9,473 7,297 5,743 Stock-based compensation expense 43,387 38,830 23,844 Litigation Expense (2,064) 22,886 16,400 JPI Amortization 6,038 — — Severance Costs 6,299 — — Adjusted EBITDA $ (44,840) $ (75,997) $ (37,920) Liquidity and Capital Resources The following table presents selected financial information and statistics pertaining to liquidity and capital resources as of December 31, 2023 and 2022 (in thousands): As of December 31, 2023 2022 Cash and cash equivalents $ 149,351 $ 148,132 Short-term investments and marketable securities 9,653 47,863 Property and equipment, net 42,682 41,855 Working capital * 43,183 149,996 * Defined as current assets net of current liabilities, excluding the current portion of restricted cash As of December 31, 2023, we had $149.4 million of cash and cash equivalents and $9.7 million of short-term investments and marketable securities.
Biggest changeThe following tables reconcile our non-GAAP measures to their nearest comparable GAAP measures (in thousands, except per share data): 57 GAAP Measure Stock-Based Compensation Litigation Expense JPI Amortization Severance Costs Lease Impairment and Lease-Related Charges Short-Swing Profit Payment Non-GAAP Measure Year Ended December 31, 2024 Subscriptions cost of revenue $ 53,487 $ (848) $ — $ — $ — $ — $ — $ 52,639 Professional services cost of revenue 96,692 (5,674) — — (1,398) — — 89,620 Total cost of revenue 150,179 (6,522) — — (1,398) — — 142,259 Total operating expense 527,696 (32,523) (4,602) (15,795) (4,136) (6,104) — 464,536 Operating (loss) income (60,853) 39,045 4,602 15,795 5,534 6,104 — 10,227 Income tax expense 1,054 1,499 — — 1,096 — — 3,649 Net (loss) income (92,262) 37,546 4,602 15,795 4,438 6,104 (1,799) (25,576) Net (loss) income per share, basic and diluted $ (1.26) $ 0.51 $ 0.06 $ 0.22 $ 0.06 $ 0.08 $ (0.02) $ (0.35) Year Ended December 31, 2023 Subscriptions cost of revenue $ 43,563 $ (925) $ — $ — $ (30) $ — $ — $ 42,608 Professional services cost of revenue 99,759 (6,055) — — (158) — — 93,546 Total cost of revenue 143,322 (6,980) — — (188) — — 136,154 Total operating expense 510,014 (36,407) 2,064 (6,038) (6,111) — — 463,522 Operating (loss) income (107,973) 43,387 (2,064) 6,038 6,299 — — (54,313) Income tax expense 3,209 1,302 — — 139 — — 4,650 Net (loss) income (111,441) 42,085 (2,064) 6,038 6,160 — — (59,222) Net (loss) income per share, basic and diluted $ (1.52) $ 0.58 $ (0.03) $ 0.08 $ 0.08 $ — $ — $ (0.81) Year Ended December 31, 2022 Subscriptions cost of revenue $ 36,005 $ (996) $ — $ — $ — $ — $ — $ 35,009 Professional services cost of revenue 97,301 (5,309) — — — — — 91,992 Total cost of revenue 133,306 (6,305) — — — — — 127,001 Total operating expense 479,695 (32,525) (22,886) — — — — 424,284 Operating (loss) income (145,010) 38,830 22,886 — — — — (83,294) Net (loss) income (150,920) 38,830 22,886 — — — — (89,204) Net (loss) income per share, basic and diluted (a) $ (2.08) $ 0.54 $ 0.32 $ — $ — $ — $ — $ (1.23) (a) Per share amounts do not foot due to rounding. 58 The following table reconciles GAAP net loss to adjusted EBITDA for the years ended December 31, 2024, 2023, and 2022 (in thousands): Year Ended December 31, 2024 2023 2022 GAAP net loss $ (92,262) $ (111,441) $ (150,920) Other expense (income), net 6,773 (17,603) 3,545 Interest expense 23,582 17,862 1,673 Income tax expense 1,054 3,209 692 Depreciation expense and amortization of intangible assets 10,030 9,473 7,297 Stock-based compensation expense 39,045 43,387 38,830 Litigation Expense 4,602 (2,064) 22,886 JPI Amortization 15,795 6,038 — Severance Costs 5,534 6,299 — Lease Impairment and Lease-Related Charges 6,104 — — Adjusted EBITDA $ 20,257 $ (44,840) $ (75,997) Liquidity and Capital Resources The following table presents selected financial information and statistics pertaining to liquidity and capital resources as of December 31, 2024 and 2023 (in thousands): As of December 31, 2024 2023 Cash and cash equivalents $ 118,552 $ 149,351 Short-term investments and marketable securities 41,308 9,653 Property and equipment, net 37,109 42,682 Working capital * 80,787 43,183 * Defined as current assets net of current liabilities.
At the same time, many of our customers have historically purchased subscriptions only for a limited set of their total potential end users. As a result of these factors, the proportion of total revenue for a customer associated with professional services is relatively high during the initial deployment period.
At the same time, many of our customers have historically purchased subscriptions for only a limited set of their total potential end users. As a result of these factors, the proportion of total revenue for a customer associated with professional services is relatively high during the initial deployment period.
Other Non-Operating Expense Other Expense (Income), Net Other (income) expense, net, consists primarily of gains and losses related to changes in foreign currency exchange rates, interest income on our cash and cash equivalents and investments, and other sources of income or expense not related to our core business operations.
Other Non-Operating Expense Other Expense (Income), Net Other expense (income), net, consists primarily of gains and losses related to changes in foreign currency exchange rates, interest income on our cash and cash equivalents and investments, and other sources of income or expense not related to our core business operations.
We incur significant customer acquisition costs, including expenses associated with hiring new sales representatives, who can take anywhere from six months to a year to become productive given the length of our sales cycle, and marketing costs which, with the exception of certain types of sales commissions, are expensed as incurred.
We incur significant customer acquisition costs, including expenses associated with hiring new sales representatives, who can take anywhere from six months to a year to become productive given the length of our sales cycle, sales commissions, and marketing costs, all of which, with the exception of certain types of sales commissions, are expensed as incurred.
We often sign multiple-year cloud subscription agreements. Backlog may vary based on changes in the average non-cancellable term of our cloud and on-premises term license subscription agreements. Non-GAAP Financial Measures To supplement our consolidated financial statements, which are prepared and presented in accordance with GAAP, we provide investors with certain non-GAAP financial performance measures.
Additionally, we often sign multiple-year subscription agreements, and backlog may vary based on changes in the average non-cancellable term of our cloud and on-premises term license subscription agreements. Non-GAAP Financial Measures To supplement our consolidated financial statements, which are prepared and presented in accordance with GAAP, we provide investors with certain non-GAAP financial performance measures.
See Note 3 to the consolidated financial statements for further details on our revenue recognition policies. 47 Key Metrics We monitor the following metrics to help us measure and evaluate the effectiveness of our operations. All dollar amounts are presented in thousands.
See Note 3 to the consolidated financial statements for further details on our revenue recognition policies. Key Metrics We monitor the following metrics to help us measure and evaluate the effectiveness of our operations. All dollar amounts are presented in thousands.
We believe both management and investors benefit from referring to these non-GAAP financial measures in assessing our performance and when planning, forecasting, and analyzing future periods. These non-GAAP financial measures also facilitate management’s internal comparisons to historical performance as well as comparisons to competitors’ operating results.
We believe both management and investors benefit from referring to these non-GAAP financial measures in assessing our performance and when planning, forecasting, and analyzing 56 future periods. These non-GAAP financial measures also facilitate management’s internal comparisons to historical performance as well as comparisons to competitors’ operating results.
We have aggressively invested, and intend to continue to invest, in our sales team in order to drive sales to new customers. We continue to make investments to enhance the expertise of our sales and marketing organization within our key industry verticals of financial services, government, life sciences, insurance, and manufacturing.
We have aggressively invested, and intend to continue to invest, in our sales team in order to drive sales to new customers. We continue to make investments to enhance the expertise of our sales and marketing organization within our key industry verticals of financial services, government, life sciences, and insurance.
While we will continue to recognize the majority of our subscriptions revenue ratably over the terms of our subscription agreements, we may experience greater variability and reduced comparability of our quarterly revenue and results with respect to the timing and nature of our term license subscription agreements due to the upfront revenue recognition.
While we will continue to recognize the majority of our subscriptions revenue ratably over the terms of our subscription agreements, we may experience greater variability and reduced comparability of our quarterly revenue 47 and results with respect to the timing and nature of our term license subscription agreements due to the upfront revenue recognition.
Many of our customers begin by building a 46 single application and then grow to build dozens of applications on our platform. Generally, the development of new applications on our platform results in the expansion of our user base within an organization and a corresponding increase in revenue.
Many of our customers begin by building a single application and then grow to build dozens of applications on our platform. Generally, the development of new applications on our platform results in the expansion of our user base within an organization and a corresponding increase in revenue.
Our non-GAAP financial performance measures include the following: non-GAAP subscriptions cost of revenue, non-GAAP professional services costs of revenue, non-GAAP total cost of revenue, non-GAAP total operating expense, non-GAAP operating loss, non-GAAP income tax expense, non-GAAP net loss, and non-GAAP net loss per share, basic and diluted.
Our non-GAAP financial performance measures include the following: non-GAAP subscriptions cost of revenue, non-GAAP professional services cost of revenue, non-GAAP total cost of revenue, non-GAAP total operating expense, non-GAAP operating loss, non-GAAP income tax expense, non-GAAP net loss, and non-GAAP net loss per share, basic and diluted.
Our cloud subscriptions revenue retention rate can fluctuate from period to period due to large customer contracts in any given period. Key Components of Results of Operations Revenue We generate revenue primarily through sales of subscriptions to our platform as well as professional services. We generally sell our software on a per-user basis or through non-user-based single application licenses.
Our cloud subscriptions revenue retention rate can fluctuate from period to period due to large customer contracts in any given period. Key Components of Results of Operations Revenue We generate revenue primarily through sales of subscriptions to our platform as well as professional services. We typically sell our software on a per-user basis or through non-user-based single application licenses.
Most of this increase was attributable to expansion at our product development center in India that we opened in August 2022.
Most of this increase was attributable to continued expansion at our product development center in India that we opened in August 2022.
We recently have, and in the future may, enter into investments in or acquisitions of complementary businesses, products, or technologies, which could also require us to seek additional equity financing, incur indebtedness, or use cash resources. We have no present binding agreements or commitments to enter into any such acquisitions.
We have in the past, and may in the future, enter into investments in or acquisitions of complementary businesses, products, or technologies, which could also require us to seek additional equity financing, incur indebtedness, or use cash resources. We have no present binding agreements or commitments to enter into any such acquisitions.
On a rolling 12-month basis, we estimate that for each of the past five fiscal years, the average lifetime value of a customer has been at least seven times greater than the associated average cost of acquiring them, including the year ended December 31, 2023.
On a rolling 12-month basis, we estimate that for each of the past five fiscal years, the average lifetime value of a customer has been at least seven times greater than the associated average cost of acquiring them, including the year ended December 31, 2024.
The amount of variable consideration excluded from the transaction price for the years ended December 31, 2023, 2022, and 2021 was immaterial. Allocating the Transaction Price Based on Standalone Selling Prices We allocate the transaction price to each performance obligation in a contract based on its relative standalone selling price, or SSP.
The amount of variable consideration excluded from the transaction price for the years ended December 31, 2024, 2023, and 2022 was immaterial. Allocating the Transaction Price Based on Standalone Selling Prices We allocate the transaction price to each performance obligation in a contract based on its relative standalone selling price, or SSP.
Cost of Revenue Subscriptions Cost of subscriptions revenue consists primarily of fees paid to our third-party managed hosting providers and other third-party service providers, personnel costs, including payroll and benefits for our technology operations and customer support teams, amortization of developed technology, and allocated overhead costs.
Cost of Revenue Subscriptions Cost of subscriptions revenue consists primarily of fees paid to our third-party managed hosting providers and other third-party service providers, personnel costs, including payroll and benefits for our technology operations and customer support teams, amortization of acquired technology, and allocated overhead costs.
Cloud Subscriptions Revenue Retention Rate As of December 31, 2023 2022 2021 Cloud subscriptions revenue retention rate 119 % 115 % 116 % A key factor to our success is the renewal and expansion of subscription agreements with our existing customers.
Cloud Subscriptions Revenue Retention Rate As of December 31, 2024 2023 2022 Cloud subscriptions revenue retention rate 116 % 119 % 115 % A key factor to our success is the renewal and expansion of subscription agreements with our existing customers.
This effectively represents recurring dollars we should expect in the current trailing 12-month period from the cohort of customers from the previous trailing 12-month period without any expansion or contraction. We subsequently measure the recurring cloud subscriptions revenue in the current trailing 12-month period from the cohort of customers from the previous trailing 12-month period.
This effectively represents recurring dollars we should expect in the current trailing 12-month period from the cohort of customers from the previous trailing 12-month period without accounting for any expansion or contraction. We subsequently measure the recurring cloud subscriptions revenue in the current trailing 12-month period from the cohort of customers from the previous trailing 12-month period.
Our maintenance and support agreements provide customers with the right to unspecified software upgrades, maintenance releases and patches released during the term of the maintenance and support agreement on a when-and-if-available basis, and rights to technical support. On-premises term license subscriptions are offered when the customer prefers to self-manage the deployment of our platform within their own infrastructure.
Our maintenance and support agreements provide customers with the right to unspecified software upgrades, maintenance updates, patches released during the term of the maintenance and support agreement on a when-and-if-available basis, and technical support. On-premises term license subscriptions are offered when the customer prefers to self-manage the deployment of our platform within their own infrastructure.
Our gross margin may fluctuate from period to period based on the above factors. Subscriptions Gross Margin Subscriptions gross margin is primarily affected by the growth in our subscriptions revenue as compared to the growth in, and timing of, costs to support such revenue.
Our gross margin may fluctuate from period to period based on the preceding factors. Subscriptions Gross Margin Subscriptions gross margin is primarily affected by the growth in our subscriptions revenue as compared to the growth in, and timing of, costs to support such revenue.
Gross Profit and Gross Margin Gross profit and gross margin (defined as gross profit as a percentage of total revenue), have been, and will continue to be, affected by various factors, including the mix of cloud subscriptions and on-premises term license subscriptions, the mix of total subscriptions revenue and professional services revenue, subscription pricing, the costs associated with third-party hosting providers, and the extent to which we expand our professional services to support future growth.
Gross Profit and Gross Margin Gross profit and gross margin (defined as gross profit as a percentage of total revenue), have been, and will continue to be, affected by various factors, including the mix of cloud subscriptions and on-premises term license subscriptions, the mix of total subscriptions revenue and professional services revenue, subscription pricing, the costs associated with third-party hosting providers, and the extent to which we expand or reduce our professional services to support future changes in our growth.
Our future capital requirements will depend on many factors, including our growth rate, the timing and extent of spending to support research and development efforts, the expansion of sales and marketing activities, particularly internationally, the introduction of new and enhanced products and functions as well as platform enhancements and professional services offerings, and the level of market acceptance of our product.
Our future capital requirements will depend on many factors, including our growth rate, the timing and extent of spending to support research and development efforts, the expansion of sales and marketing activities, the introduction of new and enhanced product solutions and functions as well as platform enhancements and professional services offerings, and the level of market acceptance of our product.
As of December 31, 2023, we had approximately 1,000 customers. Our customers primarily include financial services, government, life sciences, insurance, manufacturing, energy, healthcare, telecommunications, and transportation organizations. Generally, our sales team targets its efforts to organizations with over 2,000 employees and $2 billion in annual revenue.
As of December 31, 2024, we had over 1,000 customers. Our customers primarily include financial services, government, life sciences, insurance, manufacturing, energy, healthcare, telecommunications, and transportation organizations. Generally, our sales team targets its efforts to organizations with over 2,000 employees and $2.0 billion in annual revenue.
Research and Development Expense Research and development expense consists primarily of personnel costs for our employees who develop and enhance our platform, including salaries, bonuses, stock-based compensation, and other personnel costs. Also included are non-personnel costs such as subcontracting, consulting, professional fees to third party development resources, and allocated overhead costs.
Research and Development Expense Research and development expense consists primarily of personnel costs for our employees who develop and enhance our platform, including salaries, bonuses, stock-based compensation, and other personnel costs. Also included are non-personnel costs such as subcontracting, consulting, professional fees to third party development resources, certain information technology expenses, and allocated overhead costs.
Contractor costs decreased in 2023 compared to 2022 due to a decrease in the usage of subcontractors for professional service engagements. Subscriptions gross margin was 89.4% in 2023, consistent with the prior year as increases in subscriptions revenue were offset by a corresponding increase in hosting costs.
Contractor costs decreased in 2024 compared to 2023 due to a decrease in the usage of subcontractors for professional service engagements. Subscriptions gross margin was 89.1% in 2024, consistent with an 89.4% margin in the prior year as increases in subscriptions revenue were offset by a corresponding increase in hosting costs.
We believe we have a significant opportunity to continue to grow our international footprint, and we are investing in new geographies, including through investment in direct and indirect sales channels, professional services, and customer support and implementation partners. We have experienced strong revenue growth, with revenue of $545.4 million, $468.0 million, and $369.3 million in 2023, 2022, and 2021, respectively.
We believe we have a significant opportunity to continue to grow our international footprint, and we are investing in new geographies, including through investment in direct and indirect sales channels, professional services, and customer support and implementation partners. We have experienced strong revenue growth, with revenue of $617.0 million, $545.4 million, and $468.0 million in 2024, 2023, and 2022, respectively.
Year Ended December 31, 2022 Compared to the Year Ended December 31, 2021 For a discussion and analysis of changes in financial condition and results of operations for the year ended December 31, 2022 as compared to the year ended December 31, 2021, refer to our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC on February 16, 2023.
Year Ended December 31, 2023 Compared to the Year Ended December 31, 2022 For a discussion and analysis of changes in financial condition and results of operations for the year ended December 31, 2023 as compared to the year ended December 31, 2022, refer to our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, filed with the SEC on February 15, 2024.
In 2023, 2022, and 2021, 75.6%, 72.7%, and 71.4% of our revenue, respectively, was derived from sales of subscriptions, while the remaining 24.4%, 27.3%, and 28.6%, respectively, was derived from the sale of professional services. • Investments in Growth - We have made, and plan to continue to make, investments for long-term growth, including investing in our platform and infrastructure to continuously maximize their power and speed, meet the evolving needs of our customers, and take advantage of our market opportunity.
In 2024, 2023, and 2022, 79.5%, 75.6%, and 72.7% of our revenue, respectively, was derived from sales of subscriptions, while the remaining 20.5%, 24.4%, and 27.3%, respectively, was derived from the sale of professional services. • Investments in Growth - We have made, and plan to continue to make, investments for long-term growth, including investing in our platform and infrastructure to continuously maximize their power and speed, meet the evolving needs of our customers, and take advantage of our market opportunity.
We expect sales and marketing expense to increase in absolute dollars as we continue to invest to acquire new customers and further expand usage of our platform within our existing customer base. We will continue our efforts to build on our brand reputation and increase market awareness of our platform.
Furthermore, we expect sales and marketing expense to increase in absolute dollars as we continue to invest in acquiring new customers, further expand usage of our platform within our existing customer base, and broaden our efforts to build on our brand reputation and increase market awareness of our platform.
We have several strategic partnerships, including with Accenture, Capgemini, Deloitte, EY, KPMG, PwC, and TCS, which allow them to refer customers to us in order to purchase subscriptions. Our partners then provide professional services directly to the customers using our platform. We intend to continue focusing on adding new customers with our strategic partners.
We have several strategic partnerships, including with Accenture, Capgemini, Deloitte, EY, KPMG, PwC, and TCS, which allow them to refer customers to us in order to purchase subscriptions. Our partners then provide professional services directly to the customers using our platform.
Our cloud subscriptions revenue was $304.5 million, $236.9 million, and $179.4 million in 2023, 2022, and 2021, respectively. 45 We have invested in developing our platform, expanding our sales and marketing and research and development capabilities, and providing general and administrative resources to support our growth.
Our cloud subscriptions revenue was $368.0 million, $304.5 million, and $236.9 million in 2024, 2023, and 2022, respectively. 45 We have invested in developing our platform, expanding our sales and marketing and research and development capabilities, and providing general and administrative resources to support our growth.
Backlog Backlog represents non-cancellable future amounts to be recognized under cloud and on-premises term license subscription agreements and is representative of our remaining performance obligations. As of December 31, 2023 and 2022, we had backlog of $489.7 million and $376.5 million, respectively. Approximately 37% of our backlog as of December 31, 2023 is not expected to be recognized in 2024.
Backlog Backlog represents non-cancellable future amounts to be recognized under cloud and on-premises term license subscription agreements and is representative of our remaining performance obligations. As of December 31, 2024 and 2023, we had backlog of $546.0 million and $489.7 million, respectively. Approximately 34% of our backlog as of December 31, 2024 is not expected to be recognized in 2025.
In 2023, 2022, and 2021, 35.8%, 33.5%, and 34.0%, respectively, of our total revenue was generated from customers outside of the United States. As of December 31, 2023, we operated in 16 countries.
In 2024, 2023, and 2022, 36.6%, 35.8%, and 33.5%, respectively, of our total revenue was generated from customers outside of the United States. As of December 31, 2024, we operated in 16 countries.
Our research and development efforts are focused on enhancing the capabilities, speed, and power of our software platform. The number of employees in research and development functions grew from 652 at December 31, 2022 to 681 at December 31, 2023.
Our research and development efforts are focused on enhancing the capabilities, speed, and power of our software platform. The number of employees in research and development functions increased from 681 at December 31, 2023 to 702 at December 31, 2024.
To further help strengthen our financial position and support our growth initiatives, in November 2022 we entered into a Senior Secured Credit Facilities Credit Agreement, or the Credit Agreement, which provides for a five-year term loan facility in an aggregate principal amount of $150.0 million and, in addition, up to $75.0 million for a revolving credit facility, including a letter of credit sub-facility in the aggregate availability amount of $15.0 million 59 and a swingline sub-facility in the aggregate availability amount of $10.0 million (as a sublimit of the revolving loan facility).
To further help strengthen our financial position and support our growth initiatives, in November 2022 we entered into a Senior Secured Credit Facilities Credit Agreement, or the Credit Agreement, which, as amended to date, provides for a five-year term loan facility in an aggregate principal amount of $200.0 million and, in addition, up to $100.0 million for a revolving credit facility, including a letter of credit sub-facility in the aggregate availability amount of $20.0 million and a swingline sub-facility in the aggregate availability amount of $10.0 million (as a sublimit of the revolving loan facility). 59 The Credit Agreement matures on November 3, 2027.
Our subscriptions revenue was $412.3 million, $340.2 million, and $263.7 million in 2023, 2022, and 2021, respectively, and includes sales of our cloud subscriptions, on-premises term license subscriptions, and maintenance and support.
Our subscriptions revenue was $490.6 million, $412.3 million, and $340.2 million in 2024, 2023, and 2022, respectively, and includes sales of our cloud subscriptions, on-premises term license subscriptions, and maintenance and support.
We were in compliance with all covenants as of December 31, 2023. As of December 31, 2023, we had used borrowing capacity of $62.0 million under our $75.0 million revolving credit facility, and we had outstanding letters of credit totaling $11.8 million in connection with securing our leased office space.
As of December 31, 2024, we were in compliance with all covenants, had used borrowing capacity of $62.0 million under our $100.0 million revolving credit facility, and had outstanding letters of credit totaling $14.6 million in connection with securing our leased office space.
If we are unable to raise additional capital when desired, our business, operating results, and financial condition could be adversely affected. Sources of Funds We have historically financed our operations in large part with equity financing arrangements. Our last public offering was completed in June 2020, which was our fourth round of public offerings.
If we are unable to raise additional capital when desired, our business, operating results, and financial condition could be adversely affected. Sources of Funds We have historically financed our operations in large part with equity financing arrangements. Our last public offering was completed in June 2020. Through these public offerings, we received net proceeds of $344.8 million.
Cloud Subscriptions Revenue Year Ended December 31, 2023 2022 2021 Cloud subscriptions revenue $ 304,481 $ 236,922 $ 179,415 Cloud subscriptions revenue includes cloud subscriptions bundled with maintenance and support and hosting services. In 2023, 2022, and 2021, 73.8%, 69.7%, and 68.0%, respectively, of subscriptions revenue was cloud subscriptions revenue.
Cloud Subscriptions Revenue Year Ended December 31, 2024 2023 2022 Cloud subscriptions revenue $ 368,030 $ 304,481 $ 236,922 Cloud subscriptions revenue includes cloud subscriptions bundled with maintenance and support and hosting services. In 2024, 2023, and 2022, 75.0%, 73.8%, and 69.7%, respectively, of subscriptions revenue was cloud subscriptions revenue.
Operating Activities Net cash used by operating activities was $110.4 million for 2023 as compared to $106.6 million used by operating activities for 2022. The increase in net cash used by operating activities was primarily due to the $57.3 million payment for the premium of our judgment preservation insurance policy.
Operating Activities Net cash provided by operating activities was $6.9 million for 2024 as compared to net cash used by operating activities of $110.4 million for 2023. The increase in net cash provided by operating activities was primarily due to the prior year payment of $57.3 million for our judgment preservation insurance policy.
Revenue from government agencies represented 21.3%, 19.2%, and 19.6% of our total revenue in 2023, 2022, and 2021, respectively. No single end-customer accounted for more than 10% of our total revenue in 2023, 2022, and 2021. We offer our platform globally. Our platform supports multiple languages to facilitate collaboration and address challenges in multinational organizations.
Revenue from government agencies represented 32.2%, 29.1%, and 26.1% of our total revenue in 2024, 2023, and 2022, respectively. No single end-customer accounted for more than 10% of our total revenue in 2024, 2023, and 2022. We offer our platform globally. Our platform supports multiple languages to facilitate collaboration and address challenges in multinational organizations.
In addition, we may pursue strategic acquisitions that enhance our product offerings. We also intend to continue to invest in sales and marketing as we further expand our sales teams, increase our marketing activities, and grow our international operations. Seasonality We have historically experienced seasonality in terms of when we enter into agreements with customers.
We also intend to continue to invest in sales and marketing as we further expand our sales teams, increase our marketing activities, and grow our international operations. Seasonality We have historically experienced seasonality in terms of when we enter into agreements with customers.
With respect to new versus existing customers, $53.8 million of the increase in subscriptions revenue was derived from expanded deployments and corresponding sales of additional subscriptions to existing customers while $18.4 million was driven from sales of subscriptions to new customers.
With respect to new versus existing customers, $63.3 million of the increase in subscriptions revenue was derived from expanded deployments and corresponding sales of additional subscriptions to existing customers while $14.9 million was driven from sales of subscriptions to new customers.
Factors that could cause or contribute to these differences include those under “Risk Factors” included in Part I, Item 1A or in other parts of this Annual Report on Form 10-K. Overview Appian is a software company that automates business processes.
Factors that could cause or contribute to these differences include those under “Risk Factors” included in Part I, Item 1A or in other parts of this Annual Report on Form 10-K. Overview Appian is a software company that orchestrates business processes. The Appian Platform empowers leaders to design, automate, and optimize important processes from start to finish.
Our ability to increase sales to existing customers will depend on a number of factors, including the size of our sales and professional services teams, customers’ level of satisfaction with our platform and professional services, pricing, economic conditions, and our customers’ overall spending levels. We have also re-focused some of our professional services personnel to become customer success managers.
Our ability to increase sales to existing customers will depend on a number of factors, including the size of our sales and professional services teams, customers’ level of satisfaction with our platform and professional services, pricing, economic conditions, and our customers’ overall spending levels. • Mix of Subscriptions and Professional Services Revenue - We believe our professional services have driven customer success and facilitated the adoption of our platform by customers.
Over the past several years, revenue has increased significantly from year to year and, as a result, cash flows from customer collections have also grown. However, as we continue to invest in growing our business, operating expenses have also increased.
Over the past several years, revenue has increased significantly from year to year and, as a result, cash flows from customer collections have also grown. However, as we continue to invest in growing our business, operating expenses have also increased. In 2023, we entered into a Judgment Preservation Insurance policy in connection with our $2.036 billion judgment against Pegasystems.
The increase in subscriptions revenue was driven by a $67.6 million increase in cloud subscriptions revenue, a $2.5 million increase in on-premises software revenue, and a $2.1 million increase in maintenance and support revenue.
The increase in subscriptions revenue was driven by a $63.5 million increase in cloud subscriptions revenue, a $9.9 million increase in on-premises software revenue, and a $4.8 million increase in maintenance and support revenue.
The increase in professional services revenue was due to a $12.5 million increase in sales to new customers, which was partially offset by a $7.3 million decrease in revenue from existing customers. 53 Cost of Revenue Year Ended December 31, 2023 2022 $ Change % Change (dollars in thousands) Cost of revenue: Subscriptions $ 43,563 $ 36,005 $ 7,558 21.0% Professional services 99,759 97,301 2,458 2.5% Total cost of revenue $ 143,322 $ 133,306 $ 10,016 7.5% Subscriptions gross margin 89.4 % 89.4 % Professional services gross margin 25.0 % 23.9 % Total gross margin 73.7 % 71.5 % Cost of revenue increased $10.0 million, or 7.5%, in 2023 compared to 2022, primarily due to a $5.9 million increase in hosting costs, a $2.8 million increase in professional services and product support personnel costs, and a $1.7 million increase in overhead costs.
The decrease in professional services revenue was due to an $18.7 million decrease in revenue from existing customers, which was partially offset by a $12.1 million increase in sales to new customers. 53 Cost of Revenue Year Ended December 31, 2024 2023 $ Change % Change (dollars in thousands) Cost of revenue: Subscriptions $ 53,487 $ 43,563 $ 9,924 22.8% Professional services 96,692 99,759 (3,067) (3.1)% Total cost of revenue $ 150,179 $ 143,322 $ 6,857 4.8% Subscriptions gross margin 89.1 % 89.4 % Professional services gross margin 23.5 % 25.0 % Total gross margin 75.7 % 73.7 % Cost of revenue increased $6.9 million, or 4.8%, in 2024 compared to 2023, primarily due to an $8.5 million increase in hosting costs and a $0.2 million increase in professional services and product support personnel costs, both of which were partially offset by a $1.5 million decrease in contractor costs.
We expect to continue to invest in customer support and cloud operations to support growth in our business, and the timing of those investments is expected to cause subscriptions gross margin to fluctuate on a quarterly basis.
We expect to continue to invest in customer support and cloud operations to support growth in our business, and the timing of those investments is expected to cause subscriptions gross margin to fluctuate on a quarterly basis. 49 Professional Services Gross Margin Professional services gross margin is affected by the growth in our professional services revenue as compared to the growth in, and timing of, the costs of our Customer Success organization as well as by consultant utilization rates.
We define adjusted EBITDA as net loss before (1) other non-operating (income) expenses, net, (2) interest expense, (3) income tax expense, (4) depreciation expense and amortization of intangible assets, (5) stock-based compensation expense, (6) Litigation Expense, (7) JPI Amortization, and (8) Severance Costs. The most directly comparable GAAP financial measure to adjusted EBITDA is net loss.
We define adjusted EBITDA as net loss before (1) other expense (income), net, (2) interest expense, (3) income tax expense, (4) depreciation expense and amortization of intangible assets, (5) stock-based compensation expense, (6) Litigation Expense, (7) JPI Amortization, (8) Severance Costs, and (9) Lease Impairment and Lease-Related Charges.
The number of employees in sales and marketing functions decreased from 730 at December 31, 2022 to 666 at December 31, 2023. While headcount declined in 2023, we expect to grow sales and marketing headcount during 2024 in our principal markets and strategic growth areas.
The number of employees in sales and marketing functions decreased from 666 at December 31, 2023 to 509 at December 31, 2024. While headcount declined in 2024 due to changes in our go-to-market functions, we expect sales and marketing headcount to marginally increase from current levels in 2025 due to expected growth in our principal markets and strategic growth areas.
Users should consider the limitations of using adjusted EBITDA, including the fact this measure does not provide a complete measure of our operating performance. Adjusted EBITDA is not intended to purport to be an alternative to net loss as a measure of operating performance or to cash flows from operating activities as a measure of liquidity.
Adjusted EBITDA is not intended to purport to be an alternative to net loss as a measure of operating performance or to cash flows from operating activities as a measure of liquidity.
These non-GAAP financial performance measures exclude the effect of stock-based compensation expense, certain non-ordinary litigation-related expenses consisting of legal and other professional fees associated with the Pegasystems cases (net of insurance reimbursements), or Litigation Expense, amortization of the judgment preservation insurance policy, or JPI Amortization, and severance costs related to an involuntary 56 reduction in our workforce in 2023, or Severance Costs.
These non-GAAP financial performance measures exclude the effect of stock-based compensation expense, certain non-ordinary litigation-related expenses consisting of legal and other professional fees associated with the Pegasystems cases (net of insurance reimbursements), or Litigation Expense, amortization of the judgment preservation insurance policy, or JPI Amortization, severance costs related to involuntary reductions in our workforce, or Severance Costs, lease impairment and lease-related charges associated with actions taken to reduce the footprint of our leased office spaces, or Lease Impairment and Lease-Related Charges, and a short-swing profit disgorgement paid to us by a shareholder, or Short-Swing Profit Payment.
Additional expenses included in this category are non-personnel costs such as travel-related expenses, contracting and professional fees for such 50 services as audits, taxation, and legal, insurance and other corporate expenses, including allocated overhead costs, and bad debt expenses.
Additional expenses included in this category are non-personnel costs such as travel-related expenses, contracting and professional fees for such services as audits, taxation, and legal, insurance and other corporate expenses, including allocated overhead costs, and bad debt expenses. The number of employees in general and administrative functions decreased from 280 at December 31, 2023 to 267 at December 31, 2024.
In 2023, we generated over 76% of our subscriptions revenue from customers in these verticals. In addition, we have established relationships with strategic partners who work with organizations undergoing digital transformations. As of December 31, 2023 our total customer count was approximately 1,000.
In 2024, we generated over 77% of our subscriptions revenue from customers in these verticals. In addition, we have established relationships 46 with strategic partners who work with organizations undergoing digital transformations.
Interest Expense Interest expense consists primarily of interest on our debt, amortization of deferred financing fees, unused credit facility fees, and commitment fees on our letters of credit. 51 Results of Operations The following table sets forth our consolidated statements of operations (in thousands): Year Ended December 31, 2023 2022 2021 Revenue Subscriptions $ 412,337 $ 340,152 $ 263,738 Professional services 133,026 127,839 105,521 Total revenue 545,363 467,991 369,259 Cost of revenue Subscriptions (1) 43,563 36,005 27,330 Professional services (1) 99,759 97,301 76,763 Total cost of revenue 143,322 133,306 104,093 Gross profit 402,041 334,685 265,166 Operating expenses Sales and marketing (1) 242,381 220,374 167,852 Research and development (1) 153,098 139,210 97,517 General and administrative (1) 114,535 120,111 83,704 Total operating expenses 510,014 479,695 349,073 Operating loss (107,973) (145,010) (83,907) Other non-operating expense Other (income) expense, net (17,603) 3,545 3,584 Interest expense 17,862 1,673 372 Total other non-operating expense 259 5,218 3,956 Loss before income taxes (108,232) (150,228) (87,863) Income tax expense 3,209 692 778 Net loss $ (111,441) $ (150,920) $ (88,641) (1) Stock-based compensation as a component of these line items is as follows: Year Ended December 31, 2023 2022 2021 (in thousands) Cost of revenue Subscriptions $ 925 $ 996 $ 1,199 Professional services 6,055 5,309 3,131 Operating expenses Sales and marketing 10,842 9,152 5,426 Research and development 12,486 12,523 5,224 General and administrative 13,079 10,850 8,864 Total stock-based compensation expense $ 43,387 $ 38,830 $ 23,844 52 The following table sets forth our consolidated statements of operations data expressed as a percentage of total revenue: Year Ended December 31, 2023 2022 2021 Revenue Subscriptions 75.6 % 72.7 % 71.4 % Professional services 24.4 27.3 28.6 Total revenue 100.0 100.0 100.0 Cost of revenue Subscriptions 8.0 7.7 7.4 Professional services 18.3 20.8 20.8 Total cost of revenue 26.3 28.5 28.2 Gross profit 73.7 71.5 71.8 Operating expenses Sales and marketing 44.4 47.1 45.5 Research and development 28.1 29.7 26.4 General and administrative 21.0 25.7 22.7 Total operating expenses 93.5 102.5 94.6 Operating loss (19.8) (31.0) (22.8) Other non-operating expense Other (income) expense, net (3.2) 0.8 1.0 Interest expense 3.3 0.4 0.1 Total other non-operating expense 0.1 1.2 1.1 Loss before income taxes (19.9) (32.2) (23.9) Income tax expense 0.6 0.1 0.2 Net loss (20.5) % (32.3) % (24.1) % Year Ended December 31, 2023 Compared to the Year Ended December 31, 2022 Revenue Year Ended December 31, 2023 2022 $ Change % Change (dollars in thousands) Revenue: Subscriptions $ 412,337 $ 340,152 $ 72,185 21.2% Professional services 133,026 127,839 5,187 4.1% Total revenue $ 545,363 $ 467,991 $ 77,372 16.5% Total revenue increased $77.4 million, or 16.5%, in 2023 compared to 2022 due to an increase in our subscriptions revenue of $72.2 million and an increase in our professional services revenue of $5.2 million.
Interest Expense Interest expense consists primarily of interest on our debt, amortization of deferred financing fees, unused credit facility fees, and commitment fees on our letters of credit. 51 Results of Operations The following table sets forth our consolidated statements of operations (in thousands): Year Ended December 31, 2024 2023 2022 Revenue Subscriptions $ 490,568 $ 412,337 $ 340,152 Professional services 126,454 133,026 127,839 Total revenue 617,022 545,363 467,991 Cost of revenue Subscriptions 53,487 43,563 36,005 Professional services 96,692 99,759 97,301 Total cost of revenue 150,179 143,322 133,306 Gross profit 466,843 402,041 334,685 Operating expenses Sales and marketing 230,885 242,381 220,374 Research and development 154,977 153,098 139,210 General and administrative 141,834 114,535 120,111 Total operating expenses 527,696 510,014 479,695 Operating loss (60,853) (107,973) (145,010) Other non-operating expense Other expense (income), net 6,773 (17,603) 3,545 Interest expense 23,582 17,862 1,673 Total other non-operating expense 30,355 259 5,218 Loss before income taxes (91,208) (108,232) (150,228) Income tax expense 1,054 3,209 692 Net loss $ (92,262) $ (111,441) $ (150,920) 52 The following table sets forth our consolidated statements of operations data expressed as a percentage of total revenue: Year Ended December 31, 2024 2023 2022 Revenue Subscriptions 79.5 % 75.6 % 72.7 % Professional services 20.5 24.4 27.3 Total revenue 100.0 100.0 100.0 Cost of revenue Subscriptions 8.7 8.0 7.7 Professional services 15.7 18.3 20.8 Total cost of revenue 24.4 26.3 28.5 Gross profit 75.6 73.7 71.5 Operating expenses Sales and marketing 37.4 44.4 47.1 Research and development 25.1 28.1 29.7 General and administrative 23.0 21.0 25.7 Total operating expenses 85.5 93.5 102.5 Operating loss (9.9) (19.8) (31.0) Other non-operating expense Other expense (income), net 1.1 (3.2) 0.8 Interest expense 3.8 3.3 0.4 Total other non-operating expense 4.9 0.1 1.2 Loss before income taxes (14.8) (19.9) (32.2) Income tax expense 0.2 0.6 0.1 Net loss (15.0) % (20.5) % (32.3) % Year Ended December 31, 2024 Compared to the Year Ended December 31, 2023 Revenue Year Ended December 31, 2024 2023 $ Change % Change (dollars in thousands) Revenue: Subscriptions $ 490,568 $ 412,337 $ 78,231 19.0% Professional services 126,454 133,026 (6,572) (4.9)% Total revenue $ 617,022 $ 545,363 $ 71,659 13.1% Total revenue increased $71.7 million, or 13.1%, in 2024 compared to 2023 due to an increase in our subscriptions revenue of $78.2 million, which was partially offset by a decrease in our professional services revenue of $6.6 million.
We have generated the majority of our revenue from sales of subscriptions, which include (1) cloud subscriptions bundled with maintenance and support and hosting services and (2) term license subscriptions bundled with maintenance and support.
With our industry-leading platform and commitment to customer success, Appian is trusted by top organizations to drive transformational process change. We have generated the majority of our revenue from sales of subscriptions, which include (1) cloud subscriptions bundled with maintenance and support and hosting services and (2) term license subscriptions bundled with maintenance and support.
Our revenue is comprised of the following: 48 Subscriptions Subscriptions revenue is primarily derived from cloud subscriptions bundled with maintenance and support and hosting services and on-premises term license subscriptions bundled with maintenance and support.
We generally bill customers and collect payment for subscriptions to our platform in advance on an annual, quarterly, or monthly basis. 48 Our revenue is comprised of the following: Subscriptions Subscriptions revenue is primarily derived from cloud subscriptions bundled with maintenance and support and hosting services and on-premises term license subscriptions bundled with maintenance and support.
Other (Income) Expense, Net Year Ended December 31, 2023 2022 $ Change % Change (dollars in thousands) Other (income) expense, net $ (17,603) $ 3,545 $ (21,148) *** % of revenue (3.2) % 0.8 % Other income, net was $17.6 million in 2023 compared to other expense, net of $3.5 million in 2022.
Other Expense (Income), Net Year Ended December 31, 2024 2023 $ Change % Change (dollars in thousands) Other expense (income), net $ 6,773 $ (17,603) $ 24,376 *** % of revenue 1.1 % (3.2) % *** - Indicates a percentage change that is not meaningful Other expense, net was $6.8 million in 2024 compared to other income, net of $17.6 million in 2023.
Although we expect research and development expense to continue to increase in absolute dollars as such costs are critical to maintain and improve the quality of applications and our competitive position, we believe our product development center will result in cost savings over time.
Although we expect research and development expense to continue to increase in absolute dollars as such costs are critical to maintain and improve the quality of applications and our competitive position, we believe our product development center will result in cost efficiencies over time. 50 General and Administrative Expense General and administrative expense consists primarily of personnel costs, including salaries, bonuses, stock-based compensation, and other personnel costs for our administrative, legal, information technology, human resources, finance and accounting teams as well as our senior executives.
There were $8.7 million in foreign exchange gains in 2023 compared to $6.1 million in foreign exchange losses in 2022. Additionally, there was a $7.7 million increase in interest income stemming from increased investments.
There were $16.8 million in foreign exchange losses in 2024 compared to $8.7 million in foreign exchange gains in 2023. Additionally, there was a $2.1 million decrease in interest income across the comparative periods.
The policy provides up to $500.0 million of coverage. See Note 13 to the consolidated financial statements for additional details. The total cost of the policy was $57.3 million, which we paid with operating cash on hand. Furthermore, we have a non-cancellable cloud hosting arrangement with Amazon Web Services that contains provisions for minimum purchase commitments.
See Note 13 to the consolidated financial statements for additional details. The total cost of the policy was $57.3 million, which we paid with operating cash on hand.
These increases were partially offset by a $3.6 million decrease in marketing costs.
These decreases were partially offset by a $3.6 million increase in marketing costs and a $1.7 million increase in travel and entertainment expenses.
Although there was a 8.8% decrease in sales and marketing personnel headcount from December 31, 2022 to December 31, 2023, personnel costs overall increased due to increased wages, a $7.4 million increase in sales commissions driven by both contracts with new customers and renewals with existing customers, a $4.7 million increase in severance expense, and a $1.7 million increase in stock-based compensation expense.
Personnel costs decreased due to a 23.6% decrease in sales and marketing personnel headcount from December 31, 2023 to December 31, 2024 and a $2.6 million decrease in stock compensation expense, both of which were partially offset by a $3.5 million increase in sales commissions driven by both contracts with new customers and renewals with existing customers.
Personnel-related costs such as salaries, bonuses, commissions, payroll tax payments, and stock-based compensation expense are the most significant components of each of these expense categories. Other components of each category include professional fees for third-party services such as legal, software development resources, and contractors.
Operating Expenses Operating expenses consist of sales and marketing, research and development, and general and administrative expenses. Personnel-related costs such as salaries, bonuses, commissions, payroll tax payments, severance costs, and stock-based compensation expense are the most significant components of each of these expense categories.
These decreases were partially offset by a $1.7 million decrease in payments for debt issuance costs. 61 For a discussion and analysis of net cash used in or provided by operating, investing, and financing activities for the year ended December 31, 2021, refer to our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC on February 16, 2023.
This change was primarily due to a $50.0 million increase in share repurchases, a $42.0 million decrease in proceeds from borrowings, and a $2.7 million increase in principal payments on the term loan, partially offset by a $13.7 million increase in proceeds received from the exercise of stock options and a $1.8 million decrease in payments for employee tax withholdings associated with the net settlement of stock awards. 61 For a discussion and analysis of net cash used by or provided by operating, investing, and financing activities for the year ended December 31, 2022, refer to our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, filed with the SEC on February 15, 2024.
In addition, operating expenses include allocated overhead costs, which are primarily comprised of facility costs, employee medical benefits, employee relations expense, and certain information technology costs for such items as infrastructure, software, and cloud computing services. In general, our operating expenses are expected to continue to increase in absolute dollars as we invest resources in growing our various teams.
Other components of each category include professional fees for third-party services such as legal, software development resources, contractors, and cloud computing services. In addition, operating expenses include allocated overhead costs, which are primarily comprised of facility costs such as rent, employee medical benefits, employee relations expense, and certain information technology costs.
Total gross margin increased to 73.7% in 2023 as compared to 71.5% in 2022 driven largely by the increases in revenue and the improved professional services gross margin as compared to the prior year.
Total gross margin increased to 75.7% in 2024 as compared to 73.7% in 2023 driven largely by the increase in subscriptions revenue.
In 2024, we expect general and administrative expense to increase in absolute dollars largely due to amortization expense associated with the judgment preservation insurance as discussed in Note 13 to the consolidated financial statements and investments in our information technology team.
In 2025, we expect general and administrative expense to increase in absolute dollars largely due to investments in our information technology team.
Sales and Marketing Expense Year Ended December 31, 2023 2022 $ Change % Change (dollars in thousands) Sales and marketing $ 242,381 $ 220,374 $ 22,007 10.0% % of revenue 44.4 % 47.1 % Sales and marketing expense increased $22.0 million, or 10.0%, in 2023 compared to 2022, primarily due to a $25.1 million increase in sales and marketing personnel costs and a $1.0 million increase in overhead costs.
Sales and Marketing Expense Year Ended December 31, 2024 2023 $ Change % Change (dollars in thousands) Sales and marketing $ 230,885 $ 242,381 $ (11,496) (4.7)% % of revenue 37.4 % 44.4 % Sales and marketing expense decreased $11.5 million, or 4.7%, in 2024 compared to 2023, primarily due to a $15.3 million decrease in sales and marketing personnel costs and a $1.5 million decrease in information technology costs.
Professional services gross margin increased to 25.0% in 2023 as compared to 23.9% in 2022 due to higher professional services revenue, which was partially offset by higher personnel costs in 2023.
Professional services gross margin decreased to 23.5% in 2024 as compared to 25.0% in 2023 due to a decline in professional services revenue and a marginal increase in personnel costs, both of which were partially offset by lower contractor costs.
These increases were partially offset by a $1.2 million decrease in other income attributable to a payment received in 2022 from a local government as a result of achieving certain economic development criteria. 55 Interest Expense Year Ended December 31, 2023 2022 $ Change % Change (dollars in thousands) Interest expense $ 17,862 $ 1,673 $ 16,189 *** % of revenue 3.3 % 0.4 % *** - Indicates a percentage change that is not meaningful Interest expense increased $16.2 million in 2023 compared to the same period in 2022, primarily due to interest expense on the new term loan facility we entered into during the fourth quarter of 2022.
These decreases were partially offset by a $3.2 million increase in other income attributable to payments received in 2024, including a payment from a local government as a result of achieving certain economic development criteria and payments related to a short-swing profit disgorgement paid to us by a public shareholder of our Class A common stock. 55 Interest Expense Year Ended December 31, 2024 2023 $ Change % Change (dollars in thousands) Interest expense $ 23,582 $ 17,862 $ 5,720 32.0% % of revenue 3.8 % 3.3 % Interest expense increased $5.7 million in 2024 as compared to the corresponding period in 2023, primarily due to interest expense attributable to higher outstanding balances on our credit facility related to amendments we entered into during the fourth quarter of 2023 and first quarter of 2024.
We intend to continue to invest in our business to take advantage of our market opportunity. As a result, we incurred net losses of $111.4 million, $150.9 million, and $88.6 million in 2023, 2022, and 2021, respectively. We also used cash in operations of $110.4 million, $106.6 million, and $53.9 million in 2023, 2022, and 2021, respectively.
As a result, we incurred net losses of $92.3 million, $111.4 million, and $150.9 million in 2024, 2023, and 2022, respectively. In 2024, cash provided by operations was $6.9 million, while cash used by operations totaled $110.4 million and $106.6 million in 2023 and 2022, respectively.
These increases were partially offset by a $0.8 million decrease in contractor costs. Hosting costs increased due to an increase in sales of our cloud offering during 2023.
Hosting costs increased due to an increase in sales of our cloud offering during 2024.
Spending under this agreement for the years ended December 31, 2023, 2022, and 2021 totaled $36.6 million, $33.1 million, and $11.8 million, respectively.
Spending under this agreement for the years ended December 31, 2024, 2023, and 2022 totaled $41.2 million, $36.6 million, and $33.1 million, respectively. The timing of payments under the agreement may vary, and the total amount of payments may exceed the minimum depending on the volume of services utilized.
These increases were partially offset by a $0.6 million decrease in professional fees. Personnel costs increased due to an increase in research and development personnel headcount of 4.4% from December 31, 2022 to December 31, 2023 in addition to increased wages and a $1.0 million increase in severance expense.
These increases were partially offset by a $1.6 million decrease in research and development personnel costs. Information technology costs increased primarily due to higher cloud computing expense.
The timing of payments under the agreement may vary, and the total amount of payments may exceed the minimum depending on the volume of services utilized. 60 Historical Cash Flows Year Ended December 31, 2023 2022 $ Change % Change (dollars in thousands) Beginning cash, cash equivalents, and restricted cash $ 150,381 $ 103,960 $ 46,421 44.7 % Operating activities: Net loss (111,441) (150,920) 39,479 (26.2) Stock-based compensation and other non-cash adjustments 40,591 46,382 (5,791) (12.5) Changes in working capital (39,592) (2,013) (37,579) *** Net cash used by operating activities (110,442) (106,551) (3,891) 3.7 Investing activities: Net cash provided by investing activities 28,590 10,264 18,326 *** Financing activities: Net cash provided by financing activities 79,165 142,867 (63,702) (44.6) Effect of exchange rates 1,657 (159) 1,816 *** Net (decrease) increase in cash, cash equivalents, and restricted cash (1,030) 46,421 (47,451) *** Ending cash, cash equivalents, and restricted cash $ 149,351 $ 150,381 $ (1,030) (0.7) % *** Indicates a percentage that is not meaningful.
We expect to meet our minimum annual spending requirement during the term of the arrangement. 60 Historical Cash Flows Year Ended December 31, 2024 2023 $ Change % Change (dollars in thousands) Beginning cash, cash equivalents, and restricted cash $ 149,351 $ 150,381 $ (1,030) (0.7) % Operating activities: Net loss (92,262) (111,441) 19,179 17.2 Stock-based compensation and other non-cash adjustments 72,732 40,591 32,141 79.2 Changes in working capital 26,408 (39,592) 66,000 *** Net cash provided by (used by) operating activities 6,878 (110,442) 117,320 *** Investing activities: Net cash (used by) provided by investing activities (35,390) 28,590 (63,980) *** Financing activities: Net cash (used by) provided by financing activities (258) 79,165 (79,423) *** Effect of exchange rates (2,029) 1,657 (3,686) *** Net decrease in cash, cash equivalents, and restricted cash (30,799) (1,030) (29,769) *** Ending cash, cash equivalents, and restricted cash $ 118,552 $ 149,351 $ (30,799) (20.6) % *** Indicates a percentage that is not meaningful.
In 2023, these margins began to decline. In 2024, we expect professional services gross margin to be consistent with 2023; however, the margin remains subject to fluctuation based on the factors discussed above. Operating Expenses Operating expenses consist of sales and marketing, research and development, and general and administrative expenses.
Professional services gross margin is also impacted by the amount of services performed by subcontractors and partners as opposed to internal resources. In 2025, we expect professional services gross margin to be consistent with 2024; however, the margin remains subject to fluctuation based on the factors discussed above.
Although there was a decrease in general and administrative personnel headcount of 11.4% from December 31, 2022 to December 31, 2023, personnel costs increased due to increased wages, a $2.2 million increase in stock compensation expense, and a $0.4 million increase in severance expense.
Although professional services and product support personnel headcount decreased 11.9% from December 31, 2023 to December 31, 2024, personnel costs increased due to a $1.2 million increase in severance costs and slightly higher salaries and benefits, which were substantially offset by a $0.7 million decrease in bonus expense and a $0.5 million decrease in stock compensation expense.