Biggest changeSince our founding in 2008, we have achieved a number of significant milestones, including: • 2010: Surpassed 1,000 customers; • 2012: Started expansion into SEO software, launched Position Tracking, and opened our first U.S. office near Philadelphia, Pennsylvania; • 2014: Continued expansion of SEO capabilities with Site Audit tool; 49 • 2015: Surpassed 10,000 customers and launched Social Media tools; • 2016: Launched Content Marketing and Digital PR tools; • 2017: Completed our first round of financing led by entities affiliated with Siguler Guff & Company and introduced collaboration features, including the ability to add users and share projects and received U.S. and UK search awards for the “Best SEO Software Suite”; • 2018: Completed another round of financing led by Greycroft and e.ventures, relocated headquarters to Boston, Massachusetts, and opened an office in Dallas, Texas, surpassed $70 million in ARR, and launched our first add-on offering, Local Listings; • 2019: Surpassed 50,000 customers and $100 million in ARR, and launched our second add-on offering, our competitive intelligence tool; • 2020: Received multiple awards, including “Best SEO Software Suite” and “Best Search Software Tool” according to the European Search Awards, our headcount grew to more than 900 employees globally, and acquired Prowly; • 2021 : Completed our IPO and the Follow-On Offering and surpassed $200 million in ARR; and • 2022 : Continued expansion of our App Center to 37 apps including 17 third-party apps, increased the number of customers that pay more than $10,000 annually by more than 50% year over year, and acquired Backlinko and Kompyte. • 2023 : Surpassed $300 million in ARR, 100,000 paying customers, 1,000,000 active free customers, and acquired Traffic Think Tank and a controlling interest in Datos.
Biggest changeSince our founding in 2008, we have achieved a number of significant milestones, including: • 2010: Surpassed 1,000 customers. • 2015: Surpassed 10,000 customers. • 2016: Launched Semrush Brand and Content Marketing tools. • 2017: Completed our first round of financing and introduced collaboration features, including the ability to add users and share projects and received U.S. and UK search awards for the “Best SEO Software Suite”. • 2018: Completed another round of financing led by Greycroft and e.ventures; surpassed $70 million in ARR; and launched Semrush Local and Semrush Intelligence. • 2019: Surpassed 50,000 customers and $100 million in ARR. • 2020: Received multiple awards, including “Best SEO Software Suite” and “Best Search Software Tool” according to the European Search Awards, our headcount grew to more than 900 employees globally. • 2021 : Completed our IPO and the Follow-On Offering and surpassed $200 million in ARR. • 2022 : Launched our first AI product powered by ChatGPT 1.0. • 2023 : Surpassed $300 million in ARR, 100,000 paying customers, and 1,000,000 active free customers. • 2024 : Surpassed $400 million in ARR and launched the general availability of the Enterprise SEO solution. 51 Key Factors Affecting Our Performance We regularly review a number of factors that have impacted, and we believe will continue to impact, our results of operations and growth.
The utility of each of free cash flow and free cash flow margin as a measure of our liquidity is further limited as each measure does not represent the total increase or decrease in our cash balance for any given period.
The utility of free cash flow and free cash flow margin as a measure of our liquidity is further limited as each measure does not represent the total increase or decrease in our cash balance for any given period.
In addition, other companies, including companies in our industry, may calculate free cash flow and free cash flow margin differently or not at all, which reduces the usefulness of free cash flow and free cash flow margin as tool for comparison. A summary of our cash flows from operating, investing, and financing activities is provided below.
In addition, other companies, including companies in our industry, may calculate free cash flow and free cash flow margin differently or not at all, which reduces the usefulness of free cash flow and free cash flow margin as a tool for comparison. A summary of our cash flows from operating, investing, and financing activities is provided below.
Investing Activities Net cash used in investing activities for the year ended December 31, 2023 was $29.1 million, which resulted from $257.5 million used to purchase short-term investments, $5.2 million in capitalization of internal-use software costs, $5.1 million used in cash paid for acquisition of assets and businesses, and $2.5 million used in purchases of property and equipment.
Net cash used in investing activities for the year ended December 31, 2023 was $29.1 million, which resulted from $257.5 million used to purchase short-term investments, $5.2 million in capitalization of internal-use software costs, $5.1 million used in cash paid for acquisition of assets and businesses, and $2.5 million used in purchases of property and equipment.
We expect to continue to incur additional expenses as a result of operating as a public company, including costs to comply with rules and regulations applicable to companies listed on a U.S. securities exchange, costs related to compliance and reporting obligations pursuant to the rules and regulations of the SEC, increases in insurance premiums, investor relations, and professional services.
We expect to continue to incur additional expenses as a result of operating as a public company, including costs to 57 comply with rules and regulations applicable to companies listed on a U.S. securities exchange, costs related to compliance and reporting obligations pursuant to the rules and regulations of the SEC, increases in insurance premiums, investor relations, and professional services.
Sustaining Product and Technology Innovation We have a strong track record of developing new products that have high adoption rates among our paying customers. Our product development organization plays a critical role in continuing to enhance the 52 effectiveness and differentiation of our technology in an evolving landscape and maximizing retention of our existing customers.
Sustaining Product and Technology Innovation We have a strong track record of developing new products that have high adoption rates among our paying customers. Our product development organization plays a critical role in continuing to enhance the effectiveness and differentiation of our technology in an evolving landscape and maximizing retention of our existing customers.
In addition to these expenses, we incur third-party service provider costs, such as data center and networking expenses, data acquisition costs, allocated overhead costs, depreciation and amortization expense associated with our property and equipment, and amortization of capitalized software development costs and intangible assets acquired through business combinations and asset acquisitions.
In addition to these expenses, we incur third-party service provider costs, 56 such as data center and networking expenses, data acquisition costs, allocated overhead costs, depreciation and amortization expense associated with our property and equipment, and amortization of capitalized software development costs and intangible assets acquired through business combinations and asset acquisitions.
As such, they are accounted for as a single performance obligation. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. We primarily invoice and collect payments from our customers for in advance on a monthly or annual basis.
As such, they are accounted for as a single performance obligation. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met. We primarily invoice and collect payments from our customers on a monthly or annual basis.
Contractual Obligations and Commitments Our principal commitments consist of obligations under leases for office space and leases for data center facilities. For more information regarding our lease obligations, see Note 4 to the consolidated financial statements of this Annual Report on Form 10-K.
Contractual Obligations and Commitments Our principal commitments consist of obligations under leases for office space and leases for data center facilities. For more information regarding our lease obligations, see Note 4 “Leases” to the consolidated financial statements of this Annual Report on Form 10-K.
These subscriptions are generally stand-ready obligations as the customer has access to the service throughout the term of the subscription, and our 64 performance obligations are satisfied with the customer over time. We consider the SaaS subscription and related support services to have the same pattern of transfer to the customer.
These subscriptions are generally stand-ready obligations as the customer has access to the service throughout the term of the subscription, and our performance obligations are satisfied with the customer over time. We consider the SaaS subscription and related support services to have the same pattern of transfer to the customer.
Our subscription arrangements provide customers the right to access our hosted software applications and customers do not have the right to take possession of our software during the hosting arrangement. We recognize revenue in accordance with ASC 606, Revenue from Contracts with Customers (“ASC 606”).
Our subscription arrangements provide customers the right to access our hosted software 64 applications and customers do not have the right to take possession of our software during the hosting arrangement. We recognize revenue in accordance with ASC 606, Revenue from Contracts with Customers (“ASC 606”).
We believe there is significant opportunity to expand within our existing customer base as customers often initially purchase our entry-level subscription, which offers lower usage limits and limited user licenses, as well as fewer features.
We believe there is significant opportunity to expand within our existing customer base as customers often initially purchase our entry-level subscription, which offers lower usage limits and limited user licenses, as well as fewer features and functionality.
Subscription revenue is recognized ratably over the contract term beginning on the date on which we provide the customer access to our platform. Our customers do not have the right to 54 take possession of our software.
Subscription revenue is recognized ratably over the contract term beginning on the date on which we provide the customer access to our platform. Our customers do not have the right to take possession of our software.
Deferred contract costs that will be recorded as expense during the succeeding 12-month period are recorded as current deferred contract costs, and the remaining portion is recorded as deferred contract costs, net of current portion. Amortization of deferred contract costs is included in sales and marketing expense in the accompanying consolidated statement of operations and comprehensive income (loss).
Deferred contract costs that will be recorded as expense during the succeeding 12-month period are recorded as current deferred contract costs, and the remaining portion is recorded as deferred contract costs, net of current portion. Amortization of deferred contract costs is included in sales and marketing expense in the accompanying consolidated statements of operations and comprehensive income (loss).
Non-cash charges primarily consisted of $15.3 million of stock-based compensation expense, $10.4 million for amortization of deferred contract acquisition costs related to capitalized commissions, $6.8 million of depreciation and amortization expense, and $3.9 million of non-cash lease expense; partially offset by a cash outflow of $6.1 million for amortization (accretion) of premiums and discounts on investments.
Non-cash charges primarily consisted of $15.3 million of stock-based compensation expense, $10.4 million for amortization of deferred contract costs related to capitalized commissions, $6.8 million of depreciation and amortization expense, and $3.9 million of non-cash lease expense; partially offset by $6.1 million for accretion of premiums and discounts on investments.
We expect to fund these obligations with cash flows from operations and cash on our balance sheet. Recent Accounting Pronouncements Refer to sections titled “Recent Accounting Pronouncements” in Note 2 to the audited consolidated financial statements included elsewhere in this Annual Report on Form 10-K for more information.
We expect to fund these obligations with cash flows from operations and cash on our balance sheet. Recent Accounting Pronouncements Refer to sections titled “Recent Accounting Pronouncements” in Note 2 “Summary of Significant Accounting Policies” to the audited consolidated financial statements included elsewhere in this Annual Report on Form 10-K for more information.
We recommend that you review the reconciliation of free cash flow to net cash provided by (used in) operating activities, the most directly comparable GAAP financial measure, and the reconciliation of free cash flow margin to net cash provided by (used in) operating activities (as a percentage of revenue), the most directly comparable GAAP financial measure, provided below, and that you not rely on free cash flow, free cash flow margin or any single financial measure to evaluate our business.
We recommend that you review the reconciliation of free cash flow to net cash provided by operating activities, the most directly comparable GAAP financial measure, and the reconciliation of free cash flow margin to net cash provided by operating activities (as a percentage of 55 revenue), the most directly comparable GAAP financial measure, and that you not rely on free cash flow, free cash flow margin or any single financial measure to evaluate our business.
This section of this Annual Report on Form 10-K discusses 2023 and 2022 items and year-to-year comparisons between 2023 and 2022.
This section of this Annual Report on Form 10-K discusses 2024 and 2023 items and year-to-year comparisons between 2024 and 2023.
While we believe that free cash flow and free cash flow margin are useful in evaluating our business, free cash flow and free cash flow margin are each a non-GAAP financial measure that have limitations as an analytical tool, and free cash flow and free cash flow margin should 53 not be considered as an alternative to, or substitute for, net cash provided by (used in) operating activities in accordance with GAAP.
While we believe that free cash flow and free cash flow margin are useful in evaluating our business, free cash flow and free cash flow margin are each non-GAAP financial measures that have limitations as an analytical tool, and free cash flow and free cash flow margin should not be considered as an alternative to, or substitute for, net cash provided by operating activities in accordance with GAAP.
In addition to our leases, we also have multi-year commitments with certain data providers expiring at various dates through 2026. For more information regarding our commitments with data providers, see Note 16 to the consolidated financial statements of this Annual Report on Form 10-K.
In addition to our leases, we also have multi-year commitments with certain data providers expiring at various dates through 2026. For more information regarding our commitments with data providers, see Note 15 “Commitments and Contingencies” to the consolidated financial statements of this Annual Report on Form 10-K.
Our tax expense for the years ended December 31, 2023 and 2022 primarily relates to increased profits in our foreign subsidiaries and the requirement to capitalize certain research and development costs which results in a current U.S. tax provision but no deferred tax benefit as a result of the valuation allowance maintained against our net deferred tax assets. 57 Results of Operations for the Years Ended December 31, 2023 and 2022 The following tables set forth information comparing our results of operations in dollars and as a percentage of total revenue for the periods presented.
Our tax expense for the years ended December 31, 2024 and 2023 primarily relates to increased profits in our foreign subsidiaries, the non-deductibility of certain equity awards and the requirement to capitalize certain research and development costs which results in a current U.S. tax provision but no deferred tax benefit as a result of the valuation allowance maintained against our net deferred tax assets. 58 Results of Operations for the Years Ended December 31, 2024 and 2023 The following tables set forth information comparing our results of operations in dollars and as a percentage of total revenue for the periods presented.
Discussions of 2021 items and year-to-year comparisons between 2022 and 2021 can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, which was filed with the SEC on March 15, 2023.
Discussions of 2022 items and year-to-year comparisons between 2023 and 2022 have been omitted from this Annual Report but can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which was filed with the SEC on March 7, 2024.
Our sales team is largely focused on driving account expansion by encouraging our customers to fully recognize the potential benefit from our comprehensive platform. As a result, we have become 51 increasingly efficient at acquiring customers who increase their spend with us over time.
Our sales team is largely focused on driving account expansion by encouraging our customers to fully recognize the potential benefit from our comprehensive platform and the additional features and functionalities available in our Enterprise SEO solution. As a result, we have become increasingly efficient at acquiring customers who increase their spend with us over time.
As of December 31, 2023, we had cash and cash equivalents of $58.8 million, short-term investments of $179.7 million and accounts receivable of $7.9 million. Our principal uses of cash in recent periods have been to fund operations , invest in capital expenditures and short-term investments, and strategically acquire new businesses.
Liquidity and Capital Resources As of December 31, 2024, we had cash and cash equivalents of $48.9 million, short-term investments of $186.7 million and accounts receivable of $9.0 million. Our principal uses of cash in recent periods have been to fund operations , invest in capital expenditures and short-term investments, and strategically acquire new businesses and assets.
The change in operating assets and liabilities was primarily the result of a $9.5 million increase in deferred contract costs, a $3.3 million increase in accounts receivable, a $4.1 million decrease in operating lease liabilities, and a $2.4 million increase in prepaid expenses and other current assets.
The change in operating assets and liabilities was primarily the result of a $12.9 million increase in deferred contract costs, a $4.8 million increase in prepaid expenses and other current assets, and a $4.4 million decrease in operating lease liabilities.
Year Ended December 31, 2023 2022 (in thousands) Net cash provided by (used in) operating activities $ 7,986 $ (9,624) Net cash used in investing activities (29,068) (179,832) Net cash used in financing activities (19) (345) Effect of exchange rate changes on cash and cash equivalents 184 (275) Decrease in cash and cash equivalents $ (20,917) $ (190,076) Year Ended December 31, 2023 2022 (in thousands) Net cash provided by (used in) operating activities $ 7,986 $ (9,624) Purchases of property and equipment (2,486) (4,234) Capitalization of internal-use software costs (5,165) (1,706) Free cash flow $ 335 $ (15,564) Year Ended December 31, 2023 2022 Net cash provided by (used in) operating activities (as a percentage of revenue) 2.6 % (3.8) % Purchases of property and equipment (as a percentage of revenue) (0.8) % (1.7) % Capitalization of internal-use software costs (as a percentage of revenue) (1.7) % (0.7) % Free cash flow margin 0.1 % (6.1) % Components of our Results of Operations Revenue We generate nearly all of our revenue from subscriptions to our online visibility management platform under a SaaS model.
Year Ended December 31, 2024 2023 (in thousands) Net cash provided by operating activities $ 46,996 $ 7,986 Net cash used in investing activities (58,222) (29,068) Net cash provided by (used in) financing activities 1,870 (19) Effect of exchange rate changes on cash and cash equivalents (432) 184 Decrease in cash and cash equivalents $ (9,788) $ (20,917) Year Ended December 31, 2024 2023 (in thousands) Net cash provided by operating activities $ 46,996 $ 7,986 Purchases of property and equipment (3,802) (2,486) Capitalization of internal-use software costs (7,862) (5,165) Free cash flow $ 35,332 $ 335 Year Ended December 31, 2024 2023 Net cash provided by operating activities (as a percentage of revenue) 12.5 % 2.6 % Purchases of property and equipment (as a percentage of revenue) (1.0) % (0.8) % Capitalization of internal-use software costs (as a percentage of revenue) (2.1) % (1.7) % Free cash flow margin 9.4 % 0.1 % Components of our Results of Operations Revenue We generate nearly all of our revenue from subscriptions to our online visibility management SaaS platform under a SaaS model.
The credit facility matured on January 12, 2024. 62 Operating Activities Our largest source of operating cash is cash collections from our customers for subscription services. Our primary uses of cash from operating activities are for online advertising, personnel costs across the sales and marketing and product and development departments, and hosting costs.
Operating Activities Our largest source of operating cash is cash collections from our customers for subscription services. Our primary uses of cash from operating activities are for online advertising, personnel costs across the sales and marketing, product and development, and general and administrative departments, and hosting costs.
These cash outflows were partially offset by $241.6 million in proceed from sales and maturities of short-term investments.
These cash outflows were partially offset by $147.5 million in proceeds from sales and maturities of short-term investments.
New sales personnel require training and may take several months or more to achieve productivity; as such, the costs we incur in connection with the hiring of new sales personnel in a given period are not typically offset by increased revenue in that period and may not result in new revenue if these sales personnel fail to become productive. 55 Research and Development Research and development expenses primarily consist of personnel and related costs, including salaries, benefits, incentive compensation, stock-based compensation, and allocated overhead costs.
New sales personnel require training and may take several months or more to achieve productivity; as such, the costs we incur in connection with the hiring of new sales personnel in a given period are not typically offset by increased revenue in that period and may not result in new revenue if these sales personnel fail to become productive.
Non-GAAP Financial Measures In addition to our financial results determined in accordance with U.S. generally accepted accounting principles (“GAAP”), we believe that non-GAAP income (loss) from operations, non-GAAP income (loss) from operations margin, free cash flow and free cash flow margin, each a non-GAAP financial measure, are useful in evaluating the performance of our business.
We intend to continue investing in product development to improve our data assets, expand our products and enhance our technological capabilities. 53 Non-GAAP Financial Measures In addition to our financial results determined in accordance with U.S. generally accepted accounting principles (“GAAP”), we believe that non-GAAP income from operations, non-GAAP income from operations margin, free cash flow and free cash flow margin, each a non-GAAP financial measure, are useful in evaluating the performance of our business.
We account for income taxes in accordance with the asset and liability method. Under this method, deferred tax assets and liabilities are recognized based on temporary differences between the financial reporting and income tax bases of assets and liabilities using statutory rates.
Under this method, deferred tax assets and liabilities are recognized based on temporary differences between the financial reporting and income tax bases of assets and liabilities using statutory rates.
These outflows were partially offset by a $9.1 million increase in deferred revenue due to the addition of new customers and expansion of the business and a $6.8 million increase in accounts payable.
These outflows were partially offset by an $8.5 million increase in deferred revenue due to the addition of new customers and expansion of the business and a $1.4 million increase in accrued expenses.
On an ongoing basis, we evaluate our estimates and assumptions. Our actual results may differ from these estimates. We believe that of our significant accounting policies, which are described in Note 2 to the audited consolidated financial statements included elsewhere in this Annual Report on Form 10-K, the following accounting policies involve a greater degree of judgment and complexity.
We believe that of our significant accounting policies, which are described in Note 2 “Summary to Significant Accounting Policies” to the audited consolidated financial statements included elsewhere in this Annual Report on Form 10-K, the following accounting policies involve a greater degree of judgment and complexity.
We do not expect to incur exit costs associated with our relocation efforts in future periods. Other Income (Expense), Net Included in other income (expense), net are foreign currency transaction gains and losses.
We do not expect to incur exit costs associated with our relocation efforts in future periods. Other Income, Net Included in other income, net are foreign currency transaction gains and losses. The functional currencies of our international locations are the local currencies for these regions.
Net cash used in financing activities for the year ended December 31, 2022 was $0.3 million and consisted of cash inflows related to the exercises of stock options of $1.0 million as well as shares issued 63 in connection with the Employee Stock Purchase Plan of $0.8 million and cash outflows relating to payments on finance leases of $2.1 million.
Net cash used in financing activities for the year ended December 31, 2023 consisted of $2.5 million in cash outflows relating to payments on finance leases. These outflows were partially offset by $2.2 million in proceeds related to the exercises of stock options and $0.3 million in proceeds related to shares issued in connection with the Employee Stock Purchase Plan.
We have elected the fair value option in respect to the accounting for our convertible note investments, allowing for increases and decreases in the fair value of such investments to be recorded to other income (expense), 56 net for each reporting period.
We have elected the fair value option in respect to the accounting for our convertible debt security and investment receivable investments, allowing for increases and decreases in the fair value of such investments to be recorded to other income, net for each reporting period. Interest expense is related to interest associated with outstanding finance leases.
As indicated in the chart, our customer cohorts typically experience their lowest dollar-based net revenue retention rate during their second full year after becoming a customer, after which the dollar-based net revenue retention rate typically improves and we are able to drive increased spending across the remaining customers within the cohort.
As indicated in the chart, our customer cohorts typically experience their lowest dollar-based net revenue retention rate during their second full year after becoming a customer, after which the dollar-based net revenue retention rate typically improves and we are able to drive increased spending across the remaining customers within the cohort. 52 We calculate our dollar-based net revenue retention rate as of the end of a period by using (a) the revenue from our customers during the twelve month period ending one year prior to such period as the denominator and (b) the revenue from those same customers during the twelve months ending as of the end of such period as the numerator.
This increase was primarily driven by a $1.8 million increase to integration and data costs, primarily as a result of increasing costs incurred related to new products and customer growth, a $1.1 million increase to merchant fees commensurate with revenue growth, and a $0.8 million increase to depreciation and amortization expense primarily related to increased capitalized software balances as of December 31, 2023.
This increase was primarily driven by a $3.9 million increase to integration and data costs, primarily as a result of increasing costs incurred related to new products and customer growth, a $3.5 million increase to depreciation and amortization expense primarily related to increased intangible asset balances as of December 31, 2024, a $1.7 million increase to personnel costs, a $1.6 million increase to merchant fees commensurate with revenue growth, and an overall increase in allocable overhead costs.
We define ARR per paying customer as of a given date as ARR from our paying customers as of that date divided by the number of paying customers as of that date. We define the number of paying customers as the number of unique business and individual customers as of a given date.
We define the number of paying customers as the number of unique business and individual customers as of a given date.
Provision for Income Taxes Year Ended December 31, Change 2023 2022 Amount % (dollars in thousands) Provision for income taxes $ 3,696 $ 931 $ 2,765 297 % Percentage of total revenue 1.2 % 0.4 % For the year ended December 31, 2023, the provision for income taxes increased by $2.8 million.
Provision for Income Taxes Year Ended December 31, Change 2024 2023 Amount % (dollars in thousands) Provision for income taxes $ 13,027 $ 3,696 $ 9,331 252 % Percentage of total revenue 3.5 % 1.2 % For the year ended December 31, 2024, the provision for income taxes increased by $9.3 million.
Research and development expenses also include depreciation expense and other expenses associated with product development. Other than internal-use software costs that qualify for capitalization, research and development costs are expensed as incurred.
Research and Development Research and development expenses primarily consist of personnel and related costs, including salaries, benefits, incentive compensation, stock-based compensation, and allocated overhead costs. Research and development expenses also include depreciation expense and other expenses associated with product development. Other than internal-use software costs that qualify for capitalization, research and development costs are expensed as incurred.
Other Income, Net Year Ended December 31, Change 2023 2022 Amount % (dollars in thousands) Other income, net $ 12,313 $ 3,456 $ 8,857 256 % Percentage of total revenue 4 % 1 % For the year ended December 31, 2023, other income, net increased by $8.9 million.
Other Income, Net Year Ended December 31, Change 2024 2023 Amount % (dollars in thousands) Other income, net $ 12,094 $ 12,313 $ (219) (2) % Percentage of total revenue 3 % 4 % For the year ended December 31, 2024, other income, net decreased by $0.2 million.
This calculation excludes revenue from new customers and any non-recurring revenue. We have successfully increased ARR per paying customer over time and believe this metric is an indicator of our ability to grow the long-term value of our platform.
We have successfully increased ARR per paying customer over time and believe this metric is an indicator of our ability to grow the long-term value of our platform and products. We expect ARR per paying customer to continue to increase as customers adopt our premium offerings and we continue to introduce new products and functionality.
Non-cash charges primarily consisted of $9.0 million for amortization of deferred contract acquisition costs related to capitalized commissions, $7.4 million of stock-based compensation expense, $6.7 million of depreciation and amortization expense, and $4.5 million of non-cash lease expense.
Non-cash charges primarily consisted of $28.0 million of stock-based compensation expense, $12.5 million for amortization of deferred contract costs related to capitalized commissions, $10.1 million of depreciation and amortization expense, and $4.6 million of non-cash lease expense; partially offset by $3.3 million for accretion of premiums and discounts on investments.
For the Year Ended December 31, 2023 2022 (in thousands) Revenue $ 307,675 $ 254,316 Cost of revenue (1) 52,327 48,553 Gross profit 255,348 205,763 Operating expenses Sales and marketing (1) 126,871 126,889 Research and development (1) 57,442 41,204 General and administrative (1) 77,410 62,779 Exit Costs 1,292 11,264 Total operating expenses 263,015 242,136 Loss from operations (7,667) (36,373) Other income, net 12,313 3,456 Income (loss) before income taxes 4,646 (32,917) Provision for income taxes 3,696 931 Net income (loss) 950 (33,848) Net income (loss) attributable to noncontrolling interest in consolidated subsidiary — — Net income (loss) attributable to Semrush Holdings, Inc. $ 950 $ (33,848) (1) Includes stock-based compensation expense as follows: For the Year Ended December 31, 2023 2022 (in thousands) Cost of revenue $ 130 $ 74 Sales and marketing 3,077 2,235 Research and development 2,213 1,123 General and administrative 9,917 3,961 Total stock-based compensation $ 15,337 $ 7,393 58 The following table sets forth our consolidated statements of operations data expressed as a percentage of revenue for the periods indicated (amounts may not sum due to rounding): For the Year Ended December 31, 2023 2022 Revenue 100 % 100 % Cost of revenue 17 % 19 % Gross profit 83 % 81 % Operating expenses Sales and marketing 41 % 50 % Research and development 19 % 16 % General and administrative 25 % 25 % Exit Costs — % 4 % Total operating expenses 85 % 95 % Loss from operations (2) % (14) % Other income, net 4 % 1 % Income (loss) before income taxes 2 % (13) % Provision for income taxes 2 % — % Net income (loss) — % (13) % Net income (loss) attributable to noncontrolling interest in consolidated subsidiary — % — % Net income (loss) attributable to Semrush Holdings, Inc. — % (13) % Comparison of the Years Ended December 31, 2023 and 2022 Revenue O ur revenue during the years end ed December 31, 2023 and 2022 was as follows: For the Year Ended December 31, Change 2023 2022 Amount % (dollars in thousands) Revenue $ 307,675 254,316 $ 53,359 21 % For the year ended December 31, 2023, revenue increased by $53.4 million.
For the Year Ended December 31, 2024 2023 (in thousands) Revenue $ 376,815 $ 307,675 Cost of revenue (1) 65,477 52,327 Gross profit 311,338 255,348 Operating expenses Sales and marketing (1) 144,340 126,871 Research and development (1) 80,080 57,442 General and administrative (1) 78,610 77,410 Exit Costs — 1,292 Total operating expenses 303,030 263,015 Income (loss) from operations 8,308 (7,667) Other income, net 12,094 12,313 Income before income taxes 20,402 4,646 Provision for income taxes 13,027 3,696 Net income 7,375 950 Net loss attributable to noncontrolling interest in consolidated subsidiaries (861) — Net income attributable to Semrush Holdings, Inc. $ 8,236 $ 950 (1) Includes stock-based compensation expense as follows: For the Year Ended December 31, 2024 2023 (in thousands) Cost of revenue $ 239 $ 130 Sales and marketing 4,742 3,077 Research and development 5,906 2,213 General and administrative 17,112 9,917 Total stock-based compensation $ 27,999 $ 15,337 59 The following table sets forth our consolidated statements of operations data expressed as a percentage of revenue for the periods indicated (amounts may not sum due to rounding): For the Year Ended December 31, 2024 2023 Revenue 100 % 100 % Cost of revenue 17 % 17 % Gross profit 83 % 83 % Operating expenses Sales and marketing 38 % 41 % Research and development 21 % 19 % General and administrative 21 % 25 % Exit Costs — % — % Total operating expenses 80 % 85 % Income (loss) from operations 3 % (2) % Other income, net 3 % 4 % Income before income taxes 6 % 2 % Provision for income taxes 3 % 1 % Net income 3 % 1 % Net loss attributable to noncontrolling interest in consolidated subsidiaries — % — % Net income attributable to Semrush Holdings, Inc. 3 % 1 % Comparison of the Years Ended December 31, 2024 and 2023 Revenue O ur revenue during the years end ed December 31, 2024 and 2023 was as follows: For the Year Ended December 31, Change 2024 2023 Amount % (dollars in thousands) Revenue $ 376,815 307,675 $ 69,140 22 % For the year ended December 31, 2024, revenue increased by $69.1 million.
Net cash used in operating activities during the year ended December 31, 2022 was $9.6 million, which resulted from a net loss of $33.8 million adjusted for non-cash charges of $28.8 million and a net cash outflow of $4.5 million from changes in operating assets and liabilities.
Net cash provided by operating activities during the year ended December 31, 2024 was $47.0 million, which resulted from net income of $7.4 million adjusted for non-cash charges of $51.1 million and a net cash outflow of $11.5 million from changes in operating assets and liabilities.
Accordingly, these are the policies we believe are the most critical to aid in fully understanding and evaluating our audited consolidated financial condition and results of operations. Revenue Recognition Revenue Recognition Policy We generate revenue primarily from subscriptions to our online visibility management platform, which is comprised of subscription fees from customers accessing our SaaS services and related customer support.
Revenue Recognition Revenue Recognition Policy We generate revenue primarily from subscriptions to our online visibility management SaaS platform, which is comprised of subscription fees from customers accessing our SaaS services and related customer support.
This cash is held in deposits and money market funds. We believe our existing cash, cash equivalents, and short-term investments, along with our available financial resources from our credit facility, will be sufficient to meet our operating and capital needs for at least the next 12 months.
This cash is held in deposits and money market funds. 62 We believe our existing cash, cash equivalents, and short-term investments, will be sufficient to meet our operating and capital needs for at least the next 12 months. Our future capital requirements will depend on many factors, including those set forth under Item 1A. Risk Factors.
Operating Expenses Sales and Marketing Year Ended December 31, Change 2023 2022 Amount % (dollars in thousands) Sales and marketing $ 126,871 $ 126,889 $ (18) — % Percentage of total revenue 41 % 50 % For the year ended December 31, 2023, sales and marketing expense remained relatively flat.
Operating Expenses Sales and Marketing Year Ended December 31, Change 2024 2023 Amount % (dollars in thousands) Sales and marketing $ 144,340 $ 126,871 $ 17,469 14 % Percentage of total revenue 38 % 41 % For the year ended December 31, 2024, sales and marketing expense increased by $17.5 million.
We expect our foreign currency exchange gains and losses to continue to fluctuate in the future as foreign currency exchange rates change. Other income (expense), net also includes amounts for interest income and expense, other miscellaneous income and expense, and gains and losses unrelated to our core operations.
Other income, net also includes amounts for interest income and expense, other miscellaneous income and expense, and gains and losses unrelated to our core operations.
Marketing and advertising expense decreased by $19.6 million, primarily as a result of decreased expenses for paid video and paid search marketing.
These increases were partially offset by a $3.5 million decrease to marketing and advertising expense as a result of decreased expenses for paid video and paid search marketing.
As of December 31, 2023 and 2022, we had nearly 108,000 paying customers and over 95,000 paying customers, respectively, accounting for $337.1 million and $275.1 million in ARR, respectively. Retaining and Expanding Sales to Our Existing Customers We serve a diverse customer base across a variety of sizes and industries that is focused on maximizing their online visibility.
Retaining and Expanding Sales to Our Existing Customers We serve a diverse customer base across a variety of sizes and industries that is focused on maximizing their online visibility.
These factors include: Acquiring New Paying Customers We expect increasing demand for third-party online visibility software to accelerate adoption of our platform. Our recurring subscription model provides significant visibility into our future results and we believe ARR is the best indicator of the scale of our platform, while mitigating fluctuations due to seasonality and contract term.
Our recurring subscription model provides significant visibility into our future results and we believe Annual Recurring Revenue (“ARR”) is the best indicator of the scale of our platform and products, while mitigating fluctuations due to seasonality and contract term.
Net cash used in investing activities for the year ended December 31, 2022 was $179.8 million, which resulted from $157.9 million used to purchase short-term investments, $14.0 used in cash paid for acquisition of assets and businesses, $4.2 million used in purchases of property and equipment, and $2.0 million used to purchase convertible debt securities.
Investing Activities Net cash used in investing activities for the year ended December 31, 2024 was $58.2 million, which resulted from $151.2 million used to purchase short-term investments, $25.9 million used in cash paid for acquisition of assets and businesses, net of cash acquired, $7.9 million in capitalization of internal-use software costs, $7.8 million used in funding of investment loan receivables, $5.4 million used for the purchasing of noncontrolling interest shares, and $3.8 million used in purchases of property and equipment.
The increase in the provision for income taxes for the year ended December 31, 2023 compared to the year ended December 31, 2022 was primarily due to increased profits in our foreign subsidiaries and the requirement to capitalize certain research and development costs which results in a current U.S. tax provision but no deferred tax benefit as a result of the valuation allowance maintained against our net deferred tax assets. 61 Liquidity and Capital Resources Our principal sources of liquidity have been the net proceeds of our initial public offering in March 2021 and our follow-on offering in November 2021, which totaled $213.8 million, after deducting underwriting discounts and offering expenses paid or payable by us, and the net proceeds we received through private sales of equity securities, as well as sales of premium subscriptions to our platform.
The increase in the provision for income taxes for the year ended December 31, 2024 compared to the year ended December 31, 2023 was primarily due to increased profits in our foreign subsidiaries, the non-deductibility of certain equity awards and the requirement to capitalize certain research and development costs which results in a current U.S. tax provision but no deferred tax benefit as a result of the valuation allowance maintained against our net deferred tax assets.
We have only issued stock options with service-based vesting conditions and record the expense for these awards using the straight-line method.
We have only issued stock options with service-based vesting conditions and record the expense for these awards using the straight-line method. See Note 14 “Stock-Based Compensation” to the consolidated financial statements of this Annual Report on Form 10-K for additional information on fair value measurement of stock-based awards.
Research and Development Year Ended December 31, Change 2023 2022 Amount % (dollars in thousands) Research and development $ 57,442 $ 41,204 $ 16,238 39 % Percentage of total revenue 19 % 16 % For the year ended December 31, 2023, research and development costs increased by $16.2 million, primarily as a result of a 12% increase in headcount as compared to the year ended December 31, 2022, as well as increased compensation costs associated with the relocation of many research and development employees to higher cost countries. 60 General and administrative Year Ended December 31, Change 2023 2022 Amount % (dollars in thousands) General and administrative $ 77,410 $ 62,779 $ 14,631 23 % Percentage of total revenue 25 % 25 % For the year ended December 31, 2023, general and administrative expense increased by $14.6 million.
Research and Development Year Ended December 31, Change 2024 2023 Amount % (dollars in thousands) Research and development $ 80,080 $ 57,442 $ 22,638 39 % Percentage of total revenue 21 % 19 % For the year ended December 31, 2024, research and development costs increased by $22.6 million, primarily due to a $12.8 million increase to personnel costs, which includes a $3.7 million increase to stock based compensation expense, primarily as a result of a 11% increase in headcount as compared to the year ended December 31, 2023.
Our subscriptions are generally non-cancellable during the contractual subscription term, however our subscription contracts contain a right to a refund if requested within seven days of purchase. We offer our paid products to customers via monthly or annual subscription plans, as well as one-time and ongoing add-ons.
Our subscriptions are generally non-cancellable during the contractual subscription term, however some of our subscription contracts contain a right to a refund if requested within seven days of purchase. Cost of Revenue Cost of revenue primarily consists of expenses related to hosting our platform and products, acquiring data, merchant account fees, and providing support to our customers.
Year Ended December 31, 2023 2022 (in thousands) Loss from operations $ (7,667) $ (36,373) Stock-based compensation expense 15,337 7,393 Non-GAAP income (loss) from operations $ 7,670 $ (28,980) Year Ended December 31, 2023 2022 Loss from operations (as a percentage of revenue) (2.0) % (14.0) % Stock-based compensation expense (as a percentage of revenue) 5.0 % 3.0 % Non-GAAP income (loss) from operations (as a percentage of revenue) 3.0 % (11.0) % Free cash flow and free cash flow margin We define free cash flow, a non-GAAP financial measure, as net cash provided by (used in) operating activities less purchases of property and equipment and capitalized software development costs.
By excluding acquisition-related costs and adjustments from our non-GAAP measures, management is better able to evaluate our ability to utilize our existing assets and estimate the long-term value that acquired assets will generate for us. 54 Year Ended December 31, 2024 2023 (in thousands) Income (loss) from operations $ 8,308 $ (7,667) Stock-based compensation expense 27,999 15,337 Amortization of acquired intangibles $ 4,346 $ 2,307 Restructuring and other costs $ 2,230 $ 1,292 Acquisition-related costs $ 2,917 $ 372 Non-GAAP income from operations $ 45,800 $ 11,641 Year Ended December 31, 2024 2023 Income (loss) from operations (as a percentage of revenue) 2.2 % (2.5) % Stock-based compensation expense (as a percentage of revenue) 7.4 % 5.0 % Amortization of acquired intangibles (as a percentage of revenue) 1.2 % 0.8 % Restructuring and other costs (as a percentage of revenue) 0.6 % 0.4 % Acquisition-related costs (as a percentage of revenue) 0.8 % 0.1 % Non-GAAP income from operations margin 12.2 % 3.8 % Free cash flow and free cash flow margin We define free cash flow, a non-GAAP financial measure, as net cash provided by operating activities less purchases of property and equipment and capitalized software development costs.
For the year ended December 31, 2023, the functional currencies of our international locations were the local currencies for these regions. Any differences resulting from the re-measurement of assets and liabilities denominated in a currency other than the functional currency are recorded within other income (expense), net.
Any differences resulting from the re-measurement of assets and liabilities denominated in a currency other than the functional currency are recorded within other income, net. We expect our foreign currency exchange gains and losses to continue to fluctuate in the future as foreign currency exchange rates change.
The change in other income, net for the year ended December 31, 2023 compared to the year ended December 31, 2022 was primarily due to an increase in interest income and an increase in the fair value of convertible notes during the year.
The change in other income, net for the year ended December 31, 2024 compared to the year ended December 31, 2023 was primarily due to a decrease in fair value adjustments compared to the prior year. This decrease was partially offset by increases to foreign currency gains.
We expect ARR per paying customer to continue to increase as customers adopt our premium offerings, and we continue to introduce new products and functionality. Our ARR per paying customer as of December 31, 2023 and 2022 was $3,125 and $2,868, respectively, in absolute unrounded amounts.
Our ARR per paying customer as of December 31, 2024 and 2023 was $3,522 and $3,125, respectively, in absolute unrounded amounts. We define ARR per paying customer as of a given date as ARR from our paying customers as of that date divided by the number of paying customers as of that date.
Interest expense is related to our revolving credit facility, which matured on January 12, 2024, as well as interest associated with outstanding finance leases. Income Tax Provision We operate in several tax jurisdictions and are subject to taxes in each country or jurisdiction in which we conduct business.
Income Tax Provision We operate in several tax jurisdictions and are subject to taxes in each country or jurisdiction in which we conduct business. We account for income taxes in accordance with the asset and liability method.
The majority of this increase was driven by an increase in the number of paying customers to nearly 108,000 as of December 31, 2023 from over 95,000 as o f December 31, 2022. The increase in revenue for the year ended December 31, 2023 was also driven by growth in user licenses per customer, add-ons, and attach rates.
This increase was also driven by an increase in the number of paying customers to approximately 117,000 as of December 31, 2024 from nearly 108,000 as o f December 31, 2023. 60 Cost of Revenue, Gross Profit and Gross Margin For the Year Ended December 31, Change 2024 2023 Amount % (dollars in thousands) Cost of revenue $ 65,477 $ 52,327 $ 13,150 25 % Gross profit $ 311,338 $ 255,348 $ 55,990 22 % Gross margin 83 % 83 % For the year ended December 31, 2024, cost of revenue increased by $13.2 million.
Financing Activities Net cash used in financing activities for the year ended December 31, 2023 consisted of $2.5 million in cash outflows relating to payments on finance leases.
These cash outflows were partially offset by $241.6 million in proceeds from sales and maturities of short-term investments. 63 Financing Activities Net cash provided by financing activities for the year ended December 31, 2024 was $1.9 million and consisted of $4.1 million in proceeds related to the exercises of stock options; partially offset by $1.6 million in repayment of acquired debt and $0.6 million of cash outflows relating to payments on finance leases.
We define Annual Recurring Revenue (“ARR”) as of a given date as the monthly recurring revenue that we expect to contractually receive from all paid subscription agreements that are actively generating revenue as of that date multiplied by 12.
We define ARR as the total subscription revenue as of a given date that we expect to contractually receive over the subsequent 12 months from customers on an annualized basis, assuming no increases, reductions or cancellations.
Non-GAAP income (loss) from operations and non-GAAP income (loss) from operations margin We define non-GAAP income (loss) from operations as GAAP income (loss) from operations, excluding stock-based compensation expense.
Non-GAAP income from operations and non-GAAP income from operations margin We define non-GAAP income from operations as GAAP income from operations, excluding stock-based compensation, amortization of acquired intangible assets, acquisition-related costs, restructuring costs and other one-time expenses outside the ordinary course of business. We define non-GAAP operating margin as non-GAAP income from operations divided by GAAP revenue.
Our dollar-based net revenue retention rate enables us to evaluate our ability to retain and expand subscription revenue generated from our existing customers. Our dollar-based net revenue retention rate as of December 31, 2023 and 2022 was approximately 107% and 118%, respectively.
In 2024, macro-economic pressure in the lower end of our market was a contributing factor to a slight decrease of our dollar-based net revenue retention rate from 107% to 106% as of December 31, 2023 and 2024, respectively. This calculation excludes revenue from new customers and any non-recurring revenue.