Biggest changeGeneral and Administrative Expenses General and administrative expenses consist primarily of personnel and related costs for our executive, finance and accounting, legal, human resources, and administrative personnel, including salaries, benefits, bonuses, and stock-based compensation; legal, accounting, and other professional service fees; other corporate expenses; information technology costs; and facility costs. 51 Table of Contents Results of Operations The following table sets forth selected consolidated statement of operations data for each of the periods indicated: Year ended December 31, 2023 2022 2021 (in thousands) Revenue Subscription and support $ 558,645 $ 464,935 $ 379,340 Professional services 71,394 72,940 63,945 Total revenue 630,039 537,875 443,285 Cost of revenue Subscription and support (1) 99,193 77,711 60,551 Professional services (1) 55,029 52,174 43,282 Total cost of revenue 154,222 129,885 103,833 Gross profit 475,817 407,990 339,452 Operating expenses Research and development (1) 172,790 151,716 115,735 Sales and marketing (1) 287,035 245,260 178,785 General and administrative (1) 110,519 99,778 74,287 Total operating expenses 570,344 496,754 368,807 Loss from operations (94,527) (88,764) (29,355) Interest income 25,882 4,880 1,041 Interest expense (53,639) (6,042) (14,015) Other (expense) income, net (1,814) 926 3,229 Loss before provision for income taxes (124,098) (89,000) (39,100) Provision (benefit) for income taxes 3,427 1,947 (1,370) Net loss $ (127,525) $ (90,947) $ (37,730) (1) Stock-based compensation expense included in these line items was as follows: Year ended December 31, 2023 2022 2021 (in thousands) Cost of revenue Subscription and support $ 5,030 $ 3,437 $ 2,868 Professional services 2,540 2,128 1,729 Operating expenses Research and development 18,441 12,554 9,590 Sales and marketing 27,774 19,323 13,901 General and administrative 44,980 33,218 20,545 Total stock-based compensation expense $ 98,765 $ 70,660 $ 48,633 The following table sets forth our consolidated statement of operations data as a percentage of revenue for each of the periods indicated: 52 Table of Contents Year ended December 31, 2023 2022 2021 Revenue Subscription and support 88.7% 86.4% 85.6% Professional services 11.3 13.6 14.4 Total revenue 100.0 100.0 100.0 Cost of revenue Subscription and support 15.7 14.4 13.7 Professional services 8.7 9.7 9.8 Total cost of revenue 24.4 24.1 23.5 Gross profit 75.6 75.9 76.5 Operating expenses Research and development 27.4 28.2 26.1 Sales and marketing 45.6 45.6 40.3 General and administrative 17.5 18.6 16.8 Total operating expenses 90.5 92.4 83.2 Loss from operations (14.9) (16.5) (6.7) Interest income 4.1 0.9 0.2 Interest expense (8.5) (1.1) (3.2) Other (expense) income, net (0.3) 0.2 0.7 Loss before provision (benefit) for income taxes (19.6) (16.5) (9.0) Provision (benefit) for income taxes 0.5 0.4 (0.3) Net loss (20.1) % (16.9) % (8.7) % Revenue Comparison of Years Ended December 31, 2023 and 2022 Year ended December 31, Period-to-period change 2023 2022 Amount % Change (dollars in thousands) Revenue Subscription and support $ 558,645 $ 464,935 $ 93,710 20.2% Professional services 71,394 72,940 (1,546) (2.1)% Total revenue $ 630,039 $ 537,875 $ 92,164 17.1% Total revenue increased $92.2 million in 2023 compared to 2022 due primarily to a $93.7 million increase in subscription and support revenue.
Biggest changeGeneral and Administrative Expenses General and administrative expenses consist primarily of personnel and related costs for our executive, finance and accounting, legal, human resources, and administrative personnel, including salaries, benefits, bonuses, travel and stock-based compensation; legal, accounting, and other professional service fees; other corporate expenses; information technology costs; and facility costs. 51 Table of Contents Results of Operations The following table sets forth selected consolidated statement of operations data for each of the periods indicated: Year ended December 31, 2024 2023 2022 (in thousands) Revenue Subscription and support $ 667,646 $ 558,645 $ 464,935 Professional services 71,034 71,394 72,940 Total revenue 738,680 630,039 537,875 Cost of revenue Subscription and support (1) 118,697 99,193 77,711 Professional services (1) 53,358 55,029 52,174 Total cost of revenue 172,055 154,222 129,885 Gross profit 566,625 475,817 407,990 Operating expenses Research and development (1) 192,935 172,790 151,716 Sales and marketing (1) 347,243 287,035 245,260 General and administrative (1) 102,981 110,519 99,778 Total operating expenses 643,159 570,344 496,754 Loss from operations (76,534) (94,527) (88,764) Interest income 39,395 25,882 4,880 Interest expense (12,865) (53,639) (6,042) Other income and (expense), net 563 (1,814) 926 Loss before provision for income taxes (49,441) (124,098) (89,000) Provision for income taxes 5,601 3,427 1,947 Net loss $ (55,042) $ (127,525) $ (90,947) (1) Stock-based compensation expense included in these line items was as follows: Year ended December 31, 2024 2023 2022 (in thousands) Cost of revenue Subscription and support $ 7,979 $ 5,030 $ 3,437 Professional services 3,221 2,540 2,128 Operating expenses Research and development 21,036 18,441 12,554 Sales and marketing 35,339 27,774 19,323 General and administrative 34,575 44,980 33,218 Total stock-based compensation expense $ 102,150 $ 98,765 $ 70,660 The following table sets forth our consolidated statement of operations data as a percentage of revenue for each of the periods indicated: 52 Table of Contents Year ended December 31, 2024 2023 2022 Revenue Subscription and support 90.4% 88.7% 86.4% Professional services 9.6 11.3 13.6 Total revenue 100.0 100.0 100.0 Cost of revenue Subscription and support 16.1 15.7 14.4 Professional services 7.2 8.7 9.7 Total cost of revenue 23.3 24.4 24.1 Gross profit 76.7 75.6 75.9 Operating expenses Research and development 26.1 27.4 28.2 Sales and marketing 47.0 45.6 45.6 General and administrative 13.9 17.5 18.6 Total operating expenses 87.0 90.5 92.4 Loss from operations (10.3) (14.9) (16.5) Interest income 5.3 4.1 0.9 Interest expense (1.7) (8.5) (1.1) Other income and (expense), net 0.1 (0.3) 0.2 Loss before provision for income taxes (6.6) (19.6) (16.5) Provision for income taxes 0.8 0.5 0.4 Net loss (7.4) % (20.1) % (16.9) % Revenue Comparison of Years Ended December 31, 2024 and 2023 Year ended December 31, Period-to-period change 2024 2023 Amount % Change (dollars in thousands) Revenue Subscription and support $ 667,646 $ 558,645 $ 109,001 19.5% Professional services 71,034 71,394 (360) (0.5)% Total revenue $ 738,680 $ 630,039 $ 108,641 17.2% Total revenue increased $108.6 million in 2024 compared to 2023 due primarily to a $109.0 million increase in subscription and support revenue.
Research and Development Expenses Research and development expenses consist primarily of personnel and related costs, including salaries, benefits, bonuses, and stock-based compensation; costs of server usage by our developers; information technology costs; and facility costs.
Research and Development Expenses Research and development expenses consist primarily of personnel and related costs, including salaries, benefits, bonuses, travel and stock-based compensation; costs of server usage by our developers; information technology costs; and facility costs.
While our customers use our platform for more than 100 different use cases, across dozens of vertical industries, we organize our sales and marketing resources into three purpose-built solution groups (Financial Reporting, ESG, and GRC) focusing primarily on the office of the Chief Financial Officer (“CFO”), Chief Sustainability Officer (“CSO”), and Chief Audit Executive (“CAE”).
While our customers use our platform for more than 100 different use cases, across dozens of vertical industries, we organize our sales and marketing resources into three purpose-built solution groups (financial reporting, sustainability management, and GRC) focusing primarily on the office of the Chief Financial Officer (“CFO”), Chief Sustainability Officer (“CSO”), and Chief Audit Executive (“CAE”).
Many of our customers employ our professional services just before they file their Form 10-K, often in the first calendar quarter. As of December 31, 2023, the majority of our SEC customers reported their financials on a calendar-year basis. Our sales and marketing expense also has some degree of seasonality.
Many of our customers employ our professional services just before they file their Form 10-K, often in the first calendar quarter. As of December 31, 2024, the majority of our SEC customers reported their financials on a calendar-year basis. Our sales and marketing expense also has some degree of seasonality.
For each of the years ended December 31, 2023, 2022 and 2021, no single customer represented more than 1% of our revenue, and our largest 10 customers accounted for less than 10% of our revenue in the aggregate. We generate sales directly through our sales force and partners.
For each of the years ended December 31, 2024, 2023 and 2022, no single customer represented more than 1% of our revenue, and our largest 10 customers accounted for less than 10% of our revenue in the aggregate. We generate sales directly through our sales force and partners.
Financing Activities Cash provided by financing activities of $301.3 million for the year ended December 31, 2023 consisted of $691.1 million in proceeds from the issuance of our 2028 Notes, net of issuance costs, $12.5 million in proceeds from shares issued in connection with our employee stock purchase plan, and $4.5 million in proceeds from option exercises, partially offset by $396.9 million paid for the partial repurchase of our 2026 Notes and $9.5 million in taxes paid related to net share settlements of stock-based compensation awards.
Cash provided by financing activities of $301.3 million for the year ended December 31, 2023 consisted of $691.1 million in proceeds from the issuance of the 2028 Notes, net of issuance costs, $12.5 million in proceeds from shares issued in connection with our ESPP, and $4.5 million in proceeds from option exercises partially offset by $396.9 million paid for the partial repurchase of our 2026 Notes and $9.5 million in taxes paid related to net share settlements of stock-based compensation awards.
We recognize subscription and support revenue on a ratable basis over the contract term beginning on the date that our service is made available to the customer. Amounts that are invoiced are initially recorded as deferred revenue. Professional Services Revenue . We believe our professional services facilitate the sale of our subscription service to certain customers.
We recognize subscription and support revenue on a ratable basis over the contract term beginning on the date that our service is made available to the customer. Amounts that are invoiced are initially recorded as deferred revenue. 50 Table of Contents Professional Services Revenue . We believe our professional services facilitate the sale of our subscription service to certain customers.
Workiva provides more than 6,000 organizations across the globe with SaaS platform solutions to help solve some of the most complex reporting and disclosure challenges.
Workiva provides more than 6,300 organizations across the globe with SaaS platform solutions to help solve some of the most complex reporting and disclosure challenges.
Investing Activities Cash used in investing activities of $357.3 million for the year ended December 31, 2023 consisted of investing $573.3 million in various marketable securities, as well as purchases of fixed assets of $2.1 million primarily for computer equipment in support of expanding our infrastructure and work force.
Cash used in investing activities of $357.3 million for the year ended December 31, 2023 consisted of $573.3 million in purchases of marketable securities and $2.1 million in purchases of fixed assets primarily for computer equipment in support of expanding our infrastructure and work force.
During 2023, we recognized an additional $2.9 million in cash-based and stock-based compensation pursuant to certain severance obligations. The remaining increase in compensation, as well as the increase in software expense, were primarily due to an increase in employee headcount as we continue to invest in our go-to-market activities.
During 2024 we recognized an additional $2.2 million in cash-based and stock-based compensation pursuant to certain severance obligations. The remaining increase in compensation, as well as the increase in software expense and travel, were primarily due to an increase in employee headcount as we continue to invest in our go-to-market activities.
We intend to continue to build our sales and marketing organization and leverage our brand equity to attract new customers. Offer More Solutions. We intend to introduce new solutions to continue to meet growing demand for our platform. Our close and trusted relationships with our customers are a source for new use cases, features and solutions.
We intend to continue to build our sales and marketing organization and leverage our brand equity to attract new customers. 47 Table of Contents Offer More Solutions. We intend to introduce new solutions to continue to meet growing demand for our platform. Our close and trusted relationships with our customers are a source for new use cases, features and solutions.
We believe this expansion will add seats and revenue and continue to support our high revenue retention rates. However, we expect that enterprise-wide deals will be larger and more complex, which tend to lengthen the sales cycle. 47 Table of Contents Add Partners.
We believe this expansion will add seats and revenue and continue to support our high retention rates. However, we expect that enterprise-wide deals will be larger and more complex, which tend to lengthen the sales cycle. Add Partners.
We incurred net losses of $127.5 million and $90.9 million in 2023 and 2022, respectively. 46 Table of Contents We continue to invest for future growth and are focused on several key drivers, including focusing on multi-solution adoption by new and existing customers, further developing our partner program, accelerating international expansion and our fit-for-purpose solutions.
We incurred net losses of $55.0 million and $127.5 million in 2024 and 2023, respectively. 46 Table of Contents We continue to invest for future growth and are focused on several key drivers, including focusing on multi-solution adoption by new and existing customers, further developing our partner program, accelerating international expansion and our fit-for-purpose solutions.
We enter into certain non-cancelable agreements with third-party providers in the ordinary course of business. Our total commitments under these agreements are $28.1 million and are primarily for cloud infrastructure and cloud services.
We enter into certain non-cancelable agreements with third-party providers in the ordinary course of business. Our total commitments under these agreements are $156.4 million and are primarily for cloud infrastructure and cloud services.
Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our annual report on Form 10-K for the fiscal year ended December 31, 2022, filed with the SEC on February 21, 2023.
Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our annual report on Form 10-K for the fiscal year ended December 31, 2023, filed with the SEC on February 20, 2024.
Additionally, we offer the only unified software-as-a-service (“SaaS”) platform that brings customers’ financial reporting, Environmental, Social, and Governance (“ESG”), and Governance, Risk, and Compliance (“GRC”) together in a controlled, secure, audit-ready platform.
Additionally, we offer the only unified software-as-a-service (“SaaS”) platform that brings customers’ financial reporting, sustainability management, and Governance, Risk, and Compliance (“GRC”) together in a controlled, secure, audit-ready platform.
We continue to invest in the development of our solutions, infrastructure and sales and marketing to drive long-term growth. Our full-time employee headcount expanded to 2,526 at December 31, 2023 from 2,447 at December 31, 2022, an increase of 3.2%. We have achieved significant revenue growth in recent periods.
We continue to invest in the development of our solutions, infrastructure and sales and marketing to drive long-term growth. Our full-time employee headcount expanded to 2,828 at December 31, 2024 from 2,526 at December 31, 2023, an increase of 12.0%. We have achieved significant revenue growth in recent periods.
We expect reduced valuation multiples caused by higher interest rates, inflation, and geopolitical instability to continue to negatively impact the number of IPOs and SPACs in fiscal year 2024. Whether and to what extent the IPO and SPAC markets will moderate cannot be accurately predicted. Key Factors Affecting Our Performance Generate Growth From Existing Customers.
We expect reduced valuation multiples caused by higher interest rates, inflation, and geopolitical instability to create an uncertain impact on the number of IPOs in fiscal year 2025. Whether and to what extent the IPO and SPAC markets will moderate cannot be accurately predicted. Key Factors Affecting Our Performance Generate Growth From Existing Customers.
Growth in subscription and support revenue in 2023 was attributable mainly to strong demand and continued solution expansion across our customer base. The total number of our customers increased 6.5% from December 31, 2022 to December 31, 2023. Professional services revenue decreased $1.5 million in 2023 compared to 2022.
Growth in subscription and support revenue in 2024 was attributable mainly to strong demand and continued solution expansion across our customer base. The total number of our customers increased 4.5% from December 31, 2023 to December 31, 2024. Revenue from professional services was relatively flat in 2024 compared to 2023.
Year ended December 31, 2023 2022 2021 Subscription and support revenue from customers with annual contract value of $100k+ as a percent of total subscription and support revenue 66.3% 62.1% 60.5% Subscription and support revenue from customers with annual contract value of $150k+ as a percent of total subscription and support revenue 51.7% 47.4% 45.2% Subscription and support revenue from customers with annual contract value of $300k+ as a percent of total subscription and support revenue 31.7% 27.6% 26.1% Components of Results of Operations Revenue We generate revenue through the sale of subscriptions to our cloud-based software and the delivery of professional services.
Year ended December 31, 2024 2023 2022 Subscription and support revenue from customers with annual contract value of $100k+ as a percent of total subscription and support revenue 71.2% 66.3% 62.1% Subscription and support revenue from customers with annual contract value of $300k+ as a percent of total subscription and support revenue 35.7% 31.7% 27.6% Subscription and support revenue from customers with annual contract value of $500k+ as a percent of total subscription and support revenue 23.9% 21.5% 9.6% Components of Results of Operations Revenue We generate revenue through the sale of subscriptions to our cloud-based software and the delivery of professional services.
Other expense increased $2.7 million in 2023 compared to 2022 due primarily to losses on the sale of available-for-sale securities and losses on foreign currency transactions. 55 Table of Contents Results of Operations for Fiscal 2022 Compared to 2021 For a comparison of our results of operations for the fiscal years ended December 31, 2022 and 2021, see “Part II, Item 7.
Other income and (expense), net increased $2.4 million in 2024 compared to 2023 due primarily to gains on foreign currency transactions as well as losses on the sale of available-for-sale securities from 2023 which did not recur in 2024. 55 Table of Contents Results of Operations for Fiscal 2023 Compared to 2022 For a comparison of our results of operations for the fiscal years ended December 31, 2023 and 2022, see “Part II, Item 7.
Our annual contract value (“ACV”) for each customer is calculated by annualizing the subscription and support revenue recognized during each quarter. We believe the increase in the number of larger contracts shows our progress in expanding our customers’ adoption of our platform. Our ACV metrics as of December 31, 2023 include information related to ParsePort.
Our annual contract value (“ACV”) for each customer is calculated by annualizing the subscription and support revenue recognized during each quarter. We believe the increase in the number of larger contracts shows our progress in expanding our customers’ adoption of our platform.
As of December 31, 2023, we had outstanding debt relating to our 2026 Notes and 2028 Notes of $70.5 million and $691.9 million, with corresponding maturity dates of August 15, 2026 and August 15, 2028, respectively.
As of December 31, 2024, we had outstanding debt relating to our 2026 Notes and 2028 Notes of $70.8 million and $694.1 million, with corresponding maturity dates of August 15, 2026 and August 15, 2028, respectively.
Revenues from XBRL tagging and consulting services are recognized as the services are performed. 50 Table of Contents Cost of Revenue Cost of revenue consists primarily of personnel and related costs directly associated with our professional services, customer success teams and training personnel, including salaries, benefits, bonuses, and stock-based compensation; the costs of contracted third-party vendors; the costs of server usage by our customers; information technology costs; and facility costs.
Cost of Revenue Cost of revenue consists primarily of personnel and related costs directly associated with our professional services, customer success teams and training personnel, including salaries, benefits, bonuses, travel and stock-based compensation; the costs of contracted third-party vendors; the costs of server usage by our customers; information technology costs; and facility costs.
Cash provided by operating activities of $70.9 million for the year ended December 31, 2023 consisted of a net loss of $127.5 million adjusted for non-cash charges of $105.0 million, net cash inflows of $48.2 million from changes in operating assets and liabilities, and a $45.1 million adjustment for induced conversion expense associated with the repurchase of our convertible senior notes.
Cash provided by operating activities of $70.9 million for the year ended December 31, 2023 consisted of a net loss of $127.5 million adjusted for non-cash charges of $105.0 million and net cash inflows of $48.2 million from changes in operating assets and liabilities.
In addition, the timing of the payments of cash bonuses to employees during the first and fourth calendar quarters may result in some seasonality in operating cash flow. 48 Table of Contents Key Performance Indicators Year ended December 31, 2023 2022 2021 (dollars in thousands) Financial metrics Total revenue $ 630,039 $ 537,875 $ 443,285 Year-over-year percentage increase in total revenue 17.1% 21.3% 26.1% Subscription and support revenue $ 558,645 $ 464,935 $ 379,340 Year-over-year percentage increase in subscription and support revenue 20.2% 22.6% 28.2% Subscription and support as a percent of total revenue 88.7% 86.4% 85.6% As of December 31, 2023 2022 2021 Operating metrics Number of customers 6,034 5,664 4,315 Subscription and support revenue retention rate 97.9% 97.8% 97.0% Subscription and support revenue retention rate including add-ons 110.3% 108.5% 110.0% Number of customers with annual contract value $100k+ 1,631 1,345 1,121 Number of customers with annual contract value $150k+ 915 718 578 Number of customers with annual contract value $300k+ 311 236 183 Total customers .
In addition, the timing of the payments of cash bonuses to employees during the first and fourth calendar quarters may result in some seasonality in operating cash flow. 48 Table of Contents Key Performance Indicators Year ended December 31, 2024 2023 2022 (dollars in thousands) Financial metrics Total revenue $ 738,680 $ 630,039 $ 537,875 Year-over-year percentage increase in total revenue 17.2% 17.1% 21.3% Subscription and support revenue $ 667,646 $ 558,645 $ 464,935 Year-over-year percentage increase in subscription and support revenue 19.5% 20.2% 22.6% Subscription and support as a percent of total revenue 90.4% 88.7% 86.4% As of December 31, 2024 2023 2022 Operating metrics Number of customers 6,305 6,034 5,664 Gross retention rate 97.4% 97.9% 97.8% Net retention rate 111.9% 110.3% 108.5% Number of customers with annual contract value $100k+ 2,055 1,631 1,345 Number of customers with annual contract value $300k+ 416 311 236 Number of customers with annual contract value $500k+ 181 137 101 Total customers .
The increases in accounts receivable, prepaid expenses, other assets and account payable as well as the decrease in accrued expenses and other liabilities were attributable primarily to the timing of our billings, cash collections, and cash payments. The increase in other receivables was attributable primarily to an increase in our refundable research and development tax credit.
The increases in accounts receivable, other assets, accounts payable, and accrued expenses and other liabilities, as well as the decreases in other receivables and prepaid expenses and other assets were attributable primarily to the timing of our billings, cash collections, and cash payments.
Liquidity and Capital Resources Overview of Sources and Uses of Cash As of December 31, 2023, our principal sources of liquidity were cash, cash equivalents, and marketable securities totaling $813.7 million, which were held for working capital purposes. We have financed our operations primarily through the proceeds of offerings of equity, convertible debt, and cash from operating activities.
Liquidity and Capital Resources Overview of Sources and Uses of Cash As of December 31, 2024, our principal sources of liquidity were cash, cash equivalents, and marketable securities totaling $816.4 million, which were held for working capital purposes. We have financed our operations primarily through cash generated from operations and issuances of convertible debt.
Cash Flows The following table summarizes cash flow activity during the years ended December 31, 2023, 2022 and 2021 (in thousands): Year ended December 31, 2023 2022 2021 Cash flow provided by operating activities $ 70,875 $ 11,334 $ 49,844 Cash flow used in investing activities (357,253) (68,012) (68,631) Cash flow provided by (used in) financing activities 301,265 (1,587) (3,388) Net increase (decrease) in cash and cash equivalents, net of impact of exchange rates $ 16,524 $ (60,189) $ (22,445) 56 Table of Contents Operating Activities Our largest source of operating cash is cash collections from customers for subscription and support access to our platform.
As of December 31, 2024, we have not made any repurchases under the 2024 Repurchase Plan. 56 Table of Contents Cash Flows The following table summarizes cash flow activity during the years ended December 31, 2024, 2023 and 2022 (in thousands): Year ended December 31, 2024 2023 2022 Cash flow provided by operating activities $ 87,706 $ 70,875 $ 11,334 Cash flow used in investing activities (45,249) (357,253) (68,012) Cash flow provided by (used in) financing activities 6,741 301,265 (1,587) Net increase (decrease) in cash, cash equivalents, and restricted cash, net of impact of exchange rates $ 45,629 $ 16,524 $ (60,189) Operating Activities Our largest source of operating cash is cash collections from customers for subscription and support access to our platform.
We calculate our subscription and support revenue retention rate including add-ons by annualizing the subscription and support revenue recorded in the current quarter for our base customers that were active at the end of the current quarter.
We calculate our net retention rate by annualizing the subscription and support revenue recorded in the current quarter for our base customers that were active at the end of the current quarter. We divide the result by the annualized subscription and support revenue in the same quarter of the prior year for all base customers.
The change in operating assets and liabilities was driven by an increase in deferred revenue which was primarily due to customer growth. The increases in accounts receivable, other receivables and accrued expenses and other liabilities prepaid expenses and other assets were attributable primarily to the timing of our billings, cash collections, and cash payments.
The increases in accounts receivable, other receivables and accrued expenses and other liabilities, and prepaid expenses and other assets were attributable primarily to the timing of our billings, cash collections, and cash payments.
We recognize revenue for document set ups when the service is complete and control has transferred to the customer.
We recognize revenue for document set ups when the service is complete and control has transferred to the customer. Revenues from XBRL tagging and consulting services are recognized as the services are performed.
Our revenue grew to $630.0 million in 2023 from $537.9 million in 2022, an increase of 17.1%.
Our revenue grew to $738.7 million in 2024 from $630.0 million in 2023, an increase of 17.2%.
Companies with publicly-listed securities account for a substantial majority of our customers. Subscription and support revenue retention rate . We calculate our subscription and support revenue retention rate based on all customers that were active at the end of the same calendar quarter of the prior year (“base customers”).
We calculate our gross retention rate based on all customers that were active at the end of the same calendar quarter of the prior year (“base customers”).
Cash used in investing activities of $68.0 million for the year ended December 31, 2022 consisted of $130.8 million in purchases of marketable securities, $99.2 million for the acquisition of ParsePort, and $3.5 million in purchases of fixed assets partially offset by $150.6 million from the maturities of marketable securities as well as $15.0 million from the sale of marketable securities.
Investing Activities Cash used in investing activities of $45.2 million for the year ended December 31, 2024 consisted of $402.2 million in purchases of marketable securities, $98.1 million for the acquisition of Sustain.Life, and $1.4 million in purchases of fixed assets partially offset by $452.0 million from the maturities of marketable securities and $4.6 million from the sale of marketable securities.
The increase in professional service fees was the result of our continued investment in and support of our platform and solutions. The increase in marketing and advertising expenses are primarily due to increased events and advertising activities.
The increases in professional service fees and marketing and advertising were the result of our continued investment in and support of our platform and solutions.
The increase in travel expense was primarily due to our annual internal research and development event and a modest continued return to travel. 54 Table of Contents Sales and Marketing Sales and marketing expenses increased $41.8 million in 2023 compared to 2022 due primarily to $24.9 million in higher cash-based compensation and benefits, $8.4 million of additional stock-based compensation, a $4.3 million increase in travel expense, a $1.5 million increase in professional service fees, a $1.1 million increase in marketing and advertising, and a $1.0 million increase in software expense.
The increases in professional service fees resulted primarily from our continued investment in and support of our platform and solutions. 54 Table of Contents Sales and Marketing Sales and marketing expenses increased $60.2 million in 2024 compared to 2023 due primarily to $36.0 million in higher cash-based compensation and benefits costs, $7.6 million of additional stock-based compensation, a $4.9 million increase in travel expense, a $5.5 million increase in professional service fees, and a $5.4 million increase in marketing and advertising.
Operating Expenses Comparison of Years Ended December 31, 2023 and 2022 Year ended December 31, Period-to-period change 2023 2022 Amount % Change (dollars in thousands) Operating expenses Research and development $ 172,790 $ 151,716 $ 21,074 13.9% Sales and marketing 287,035 245,260 41,775 17.0% General and administrative 110,519 99,778 10,741 10.8% Total operating expenses $ 570,344 $ 496,754 $ 73,590 14.8% Research and Development Research and development expenses increased $21.1 million in 2023 compared to 2022 due primarily to $14.4 million in higher cash-based compensation and benefits, $5.9 million of additional stock-based compensation, and a $0.7 million increase in travel expense.
Operating Expenses Comparison of Years Ended December 31, 2024 and 2023 Year ended December 31, Period-to-period change 2024 2023 Amount % Change (dollars in thousands) Operating expenses Research and development $ 192,935 $ 172,790 $ 20,145 11.7% Sales and marketing 347,243 287,035 60,208 21.0% General and administrative 102,981 110,519 (7,538) (6.8)% Total operating expenses $ 643,159 $ 570,344 $ 72,815 12.8% Research and Development Research and development expenses increased $20.1 million in 2024 compared to 2023 due primarily to $13.9 million in higher cash-based compensation and benefits costs, $2.6 million of additional stock-based compensation, and a $3.0 million increase in professional service fees.
With the exception of September 2021 when we transitioned to a virtual event, sales and marketing expense has historically been higher in the third quarter due to our annual user conference in September, which was held as a hybrid in-person/virtual event in 2022.
Sales and marketing expense has historically been higher in the third quarter due to our annual user conference in September.
Non-Operating Income (Expenses) Comparison of Years Ended December 31, 2023 and 2022 Year ended December 31, Period-to-period change 2023 2022 Amount (dollars in thousands) Interest income $ 25,882 $ 4,880 $ 21,002 Interest expense (53,639) (6,042) (47,597) Other (expense) income, net (1,814) 926 (2,740) Interest income increased $21.0 million in 2023 compared to 2022 due primarily to larger investment balances coupled with higher interest rates.
Non-Operating Income (Expenses) Comparison of Years Ended December 31, 2024 and 2023 Year ended December 31, Period-to-period change 2024 2023 Amount (dollars in thousands) Interest income $ 39,395 $ 25,882 $ 13,513 Interest expense (12,865) (53,639) 40,774 Other income and (expense), net 563 (1,814) 2,377 Interest income increased $13.5 million in 2024 compared to 2023 due primarily to an increase in our investment balance, facilitated by the issuance of our 2028 convertible notes (the "2028 Notes"), coupled with higher interest rates.
Interest expense increased in 2023 compared to 2022 due primarily to a $45.1 million loss on induced conversion from the partial repurchase of our convertible senior notes due in 2026.
We recorded a $45.1 million loss on induced conversion from the partial repurchase of our 2026 Notes in the third quarter of 2023 which did not recur in 2024 and contributed primarily to the decrease in interest expense compared to the same period a year ago.
The increase in compensation resulted primarily from our continued investment in and support of our platform and solutions. During 2023 we recognized an additional $3.1 million in cash-based and stock-based compensation pursuant to certain severance obligations.
During 2024 we recognized an additional $1.0 million in cash-based and stock-based compensation pursuant to certain severance obligations. The remaining increase in compensation was primarily due to a modest increase in employee headcount.
Cash provided by operating activities of $11.3 million for the year ended December 31, 2022 consisted of a net loss of $90.9 million offset by non-cash charges of $83.9 million and net cash inflows of $18.3 million from changes in operating assets and liabilities. Customer growth accounted for most of the increase in deferred revenue.
Cash provided by operating activities of $87.7 million for the year ended December 31, 2024 consisted of a net loss of $55.0 million adjusted for non-cash charges of $103.2 million and net cash inflows of $39.6 million from changes in operating assets and liabilities.
The increases in compensation, cloud infrastructure services, software expense, and outsourced service fees resulted primarily from our continued investment in and support of our platform and solutions. The increase in travel expense was due to a modest continued return to travel.
The increases in compensation and software expense resulted primarily from our continued investment in and support of our platform and solutions. The increase in travel expense was due to a general increase in travel driven by an increase in employee headcount. Amortization of acquired intangible assets for Sustain.Life was $1.1 million.
General and Administrative General and administrative expenses increased $10.7 million in 2023 compared to 2022, due primarily to $1.4 million in higher cash-based compensation and benefits, $11.6 million of additional stock-based compensation, and a $0.9 million increase in public relations expense, partially offset by a $3.1 million decrease related to consulting, recruiting and professional services fees and a $1.4 million decrease in goods and service tax expense.
General and Administrative General and administrative expenses decreased $7.5 million in 2024 compared to 2023, due primarily to a $10.5 million decrease in stock-based compensation partially offset by a $2.9 million increase in professional service fees.
We expect the revenue growth rate from subscription and support to continue to outpace revenue growth from professional services on an annual basis. 53 Table of Contents Cost of Revenue Comparison of Years Ended December 31, 2023 and 2022 Year ended December 31, Period-to-period change 2023 2022 Amount % Change (dollars in thousands) Cost of revenue Subscription and support $ 99,193 $ 77,711 $ 21,482 27.6% Professional services 55,029 52,174 2,855 5.5% Total cost of revenue $ 154,222 $ 129,885 $ 24,337 18.7% Cost of revenue increased $24.3 million in 2023 compared to 2022 due primarily to $16.1 million in higher cash-based compensation and benefits costs due in part to increased headcount, $2.0 million of additional stock-based compensation, a $3.2 million increase in the cost of cloud infrastructure services, a $1.1 million increase in travel expense, a $0.7 million increase in software expense, and a $0.5 million increase in outsourced service fees.
We continue to transition consulting and other services to our partners and expect the revenue growth rate from subscription and support to continue to outpace revenue growth from professional services on an annual basis. 53 Table of Contents Cost of Revenue Comparison of Years Ended December 31, 2024 and 2023 Year ended December 31, Period-to-period change 2024 2023 Amount % Change (dollars in thousands) Cost of revenue Subscription and support $ 118,697 $ 99,193 $ 19,504 19.7% Professional services 53,358 55,029 (1,671) (3.0)% Total cost of revenue $ 172,055 $ 154,222 $ 17,833 11.6% Cost of revenue increased $17.8 million in 2024 compared to 2023.
Customers whose securities were deregistered due to merger or acquisition or financial distress accounted for just over half of our revenue attrition in the latest quarter. Subscription and support revenue retention rate including add-ons . Add-on revenue includes the change in both solutions and pricing for existing customers.
We believe that our success in maintaining a high rate of retention is attributable primarily to our robust technology platform and strong customer service. Customers whose securities were deregistered due to merger or acquisition or financial distress accounted for just under half of our revenue attrition in the latest quarter. 49 Table of Contents Net retention rate .
Cash used in financing activities of $1.6 million for the year ended December 31, 2022 consisted of $12.5 million in taxes paid related to net share settlements of stock-based compensation awards and $1.6 million in principal payments on finance lease obligations partially offset by $9.3 million in proceeds from shares issued in connection with our employee stock purchase plan and $3.3 million in proceeds from option exercises. 57 Table of Contents Contractual Obligations and Commitments The following table represents our contractual obligations as of December 31, 2023, aggregated by type: Payments due by period Total Less than 1 year 1-3 years 3-5 years More than 5 years (in thousands) Convertible senior notes $ 819,441 $ 9,496 $ 90,395 $ 719,550 $ — Operating leases including imputed interest 18,830 6,048 7,198 3,220 2,364 Finance leases, including interest 22,605 1,315 2,630 2,630 16,030 Other contractual commitments 28,137 24,298 3,839 — — Total contractual obligations $ 889,013 $ 41,157 $ 104,062 $ 725,400 $ 18,394 Total future payments related to our convertible senior notes shown in the table above includes $773.2 million aggregate principal amount and future interest payments associated with the Notes of $46.2 million.
Contractual Obligations and Commitments The following table represents our contractual obligations as of December 31, 2024, aggregated by type: Payments due by period Total Less than 1 year 1-3 years 3-5 years More than 5 years (in thousands) Convertible senior notes $ 809,944 $ 9,576 $ 89,593 $ 710,775 $ — Operating leases including imputed interest 16,723 5,577 5,956 3,102 2,088 Finance leases, including interest 21,290 1,315 2,630 2,630 14,715 Other contractual commitments 156,408 46,601 55,807 54,000 — Total contractual obligations $ 1,004,365 $ 63,069 $ 153,986 $ 770,507 $ 16,803 Total future payments related to our convertible senior notes shown in the table above includes $773.2 million aggregate principal amount and future interest payments associated with the Notes of $36.7 million.
In addition, during 2023 we recorded one-time fees of $0.6 million related to the cancellation of certain events. During 2023 we recognized an additional $1.4 million and $18.1 million in cash-based compensation and stock-based compensation, respectively, pursuant to certain transition agreements with former executives.
The decrease in stock-based compensation is primarily due to the recognition of $1.4 million and $18.1 million in cash-based and stock-based compensation, respectively, pursuant to certain transition agreements with former executives during the first quarter of 2023 which did not recur in 2024, partially offset by a modest increase in employee headcount and an increase in performance-based restricted stock expense driven by additional performance-based restricted stock awards issued to executives in 2024 and changes in the assumptions associated with the attainment of company-specific performance targets.
We divide the result by the annualized subscription and support revenue in the same quarter of the prior year for all base customers. 49 Table of Contents Our subscription and support revenue retention rate including add-ons was 110.3% as of the year ended December 31, 2023, up from 108.5% as of December 31, 2022. Annual contract value.
We believe our net retention rate is an important metric to measure the long-term value of customer agreements and our ability to retain our customers. Our net retention rate was 111.9% as of the year ended December 31, 2024, up from 110.3% as of December 31, 2023. Annual contract value.