Biggest changeWe have a full valuation allowance on our U.S. federal, U.S. state, and U.K. deferred tax assets as we have concluded that it is more likely than not that the deferred tax assets will not be realized. 82 Table of contents Results of Operations The following tables set forth our consolidated results of operations for the periods presented in dollars and as a percentage of our revenue for those periods: Year Ended December 31, 2023 2022 2021 (in thousands) Revenue $ 1,296,745 $ 975,241 $ 656,426 Cost of revenue (1) 307,005 232,610 147,134 Gross profit 989,740 742,631 509,292 Operating expenses: Sales and marketing (1) 599,117 465,762 328,065 Research and development (1) 358,143 298,303 189,408 General and administrative (1) 217,965 179,769 119,503 Total operating expenses 1,175,225 943,834 636,976 Loss from operations (185,485) (201,203) (127,684) Non-operating income (expense): Interest income 68,167 14,877 1,970 Interest expense (5,872) (4,984) (49,234) Loss on extinguishment of debt (50,300) — (72,234) Other income (expense), net (4,372) 577 (794) Total non-operating income (expense), net 7,623 10,470 (120,292) Loss before income taxes (177,862) (190,733) (247,976) Provision for income taxes 6,087 2,648 12,333 Net loss $ (183,949) $ (193,381) $ (260,309) _______________ (1) Includes stock-based compensation expense as follows: Year Ended December 31, 2023 2022 2021 (in thousands) Cost of revenue $ 7,967 $ 6,251 $ 2,583 Sales and marketing 73,682 50,317 27,277 Research and development 132,417 103,276 44,196 General and administrative 59,923 42,933 16,081 Total stock-based compensation expense $ 273,989 $ 202,777 $ 90,137 83 Table of contents Year Ended December 31, 2023 2022 2021 Percentage of Revenue Data: Revenue 100 % 100 % 100 % Cost of revenue 24 24 22 Gross margin 76 76 78 Operating expenses: Sales and marketing 46 48 50 Research and development 27 31 29 General and administrative 17 18 18 Total operating expenses 90 97 97 Loss from operations (14) (21) (19) Non-operating income (expense): Interest income 5 2 — Interest expense — (1) (8) Loss on extinguishment of debt (4) — (11) Other income (expense), net — — — Total non-operating income (expense), net 1 1 (19) Loss before income taxes (13) (20) (38) Provision for income taxes 1 — 2 Net loss (14) % (20) % (40) % Comparison of the Years Ended December 31, 2023 and 2022 Revenue Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) Revenue $ 1,296,745 $ 975,241 $ 321,504 33 % Revenue increased by $321.5 million, or 33%, for the year ended December 31, 2023 compared to the year ended December 31, 2022.
Biggest changeWe have a full valuation allowance on our U.S. federal, U.S. state, and U.K. deferred tax assets as we have concluded that it is more likely than not that the deferred tax assets will not be realized. 84 Table of contents Results of Operations The following tables set forth our consolidated results of operations for the periods presented in dollars and as a percentage of our revenue for those periods: Year Ended December 31, 2024 2023 2022 (in thousands) Revenue $ 1,669,626 $ 1,296,745 $ 975,241 Cost of revenue 378,702 307,005 232,610 Gross profit 1,290,924 989,740 742,631 Operating expenses: Sales and marketing 745,791 599,117 465,762 Research and development 421,374 358,143 298,303 General and administrative 278,520 217,965 179,769 Total operating expenses 1,445,685 1,175,225 943,834 Loss from operations (154,761) (185,485) (201,203) Non-operating income (expense): Interest income 87,426 68,167 14,877 Interest expense (5,196) (5,872) (4,984) Loss on extinguishment of debt — (50,300) — Other income (expense), net 1,660 (4,372) 577 Total non-operating income, net 83,890 7,623 10,470 Loss before income taxes (70,871) (177,862) (190,733) Provision for income taxes 7,929 6,087 2,648 Net loss $ (78,800) $ (183,949) $ (193,381) 85 Table of contents Year Ended December 31, 2024 2023 2022 Percentage of Revenue Data: Revenue 100 % 100 % 100 % Cost of revenue 23 24 24 Gross margin 77 76 76 Operating expenses: Sales and marketing 44 46 48 Research and development 25 27 31 General and administrative 17 17 18 Total operating expenses 86 90 97 Loss from operations (9) (14) (21) Non-operating income (expense): Interest income 5 5 2 Interest expense — — (1) Loss on extinguishment of debt — (4) — Other income (expense), net — — — Total non-operating income, net 5 1 1 Loss before income taxes (4) (13) (20) Provision for income taxes 1 1 — Net loss (5) % (14) % (20) % Comparison of the Years Ended December 31, 2024 and 2023 Revenue Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) Revenue $ 1,669,626 $ 1,296,745 $ 372,881 29 % Revenue increased by $372.9 million, or 29%, for the year ended December 31, 2024 compared to the year ended December 31, 2023.
GAAP financial measures, and not to rely on any single financial measure to evaluate our business. Non-GAAP Income (Loss) from Operations and Non-GAAP Operating Margin We define non-GAAP income (loss) from operations and non-GAAP operating margin as U.S. GAAP income (loss) from operations and U.S.
GAAP financial measures, and not to rely on any single financial measure to evaluate our business. Non-GAAP Income from Operations and Non-GAAP Operating Margin We define non-GAAP income from operations and non-GAAP operating margin as U.S. GAAP loss from operations and U.S.
GAAP operating margin, respectively, excluding stock-based compensation expense and its related employer payroll taxes, amortization of acquired intangible assets, and acquisition-related and other expenses. We exclude stock-based compensation expense, which is a non-cash expense, from certain of our non-GAAP financial measures because we believe that excluding this item provides meaningful supplemental information regarding operational performance.
GAAP operating margin, respectively, excluding stock-based compensation expense and its related employer payroll taxes, amortization of acquired intangible assets, acquisition-related and other expenses. We exclude stock-based compensation expense, which is a non-cash expense, from certain of our non-GAAP financial measures because we believe that excluding this item provides meaningful supplemental information regarding operational performance.
Investing Activities Net cash used in investing activities during the year ended December 31, 2023 of $186.2 million resulted primarily from the purchases of available-for-sale securities of $1,877.5 million, capital expenditures of $114.4 million, capitalization of internal-use software development costs of $20.5 million, and cash paid for asset acquisitions of $6.1 million.
Net cash used in investing activities during the year ended December 31, 2023 of $186.2 million resulted primarily from the purchases of available-for-sale securities of $1,877.5 million, capital expenditures of $114.4 million, capitalization of internal-use software development costs of $20.5 million, and cash paid for asset acquisitions of $6.1 million.
However, non-GAAP financial information is presented for supplemental informational purposes only, has limitations as an analytical tool, and should not be considered in isolation or as a substitute for financial information presented in accordance with U.S. GAAP. In particular, free cash flow is not a substitute for cash provided by (used in) operating activities.
However, non-GAAP financial information is presented for supplemental informational purposes only, has limitations as an analytical tool, and should not be considered in isolation or as a substitute for financial information presented in accordance with U.S. GAAP. In particular, free cash flow is not a substitute for cash provided by operating activities.
Cost of revenue also includes employee-related costs, including salaries, bonuses, benefits, and stock-based compensation for employees whose primary responsibilities relate to supporting our paying customers. Other costs included in cost of revenue include credit card fees related to processing customer transactions and allocated overhead costs.
Cost of revenue also includes employee-related costs, including salaries, benefits, and stock-based compensation for employees whose primary responsibilities relate to supporting our paying customers. Other costs included in cost of revenue include credit card fees related to processing customer transactions and allocated overhead costs.
We believe that historical and future trends in free cash flow and free cash flow margin, even if negative, provide useful information about the amount of cash generated (or consumed) by our operating activities that is available (or not available) to be used for strategic initiatives.
We believe that historical and future trends in free cash flow and free cash flow margin, even if negative, provide useful information about the amount of cash generated by our operating activities that is available (or not available) to be used for strategic initiatives.
As our customers expand and increase the use of our global network and products driven by additional applications and connected devices, we expect that our cost of revenue will increase due to higher network and bandwidth costs and expenses related to operating in additional co-location facilities.
As our customers expand and increase the use of our global network and products driven by additional applications and connected devices, we expect that our cost of revenue will continue to increase due to higher network and bandwidth costs and expenses related to operating in additional co-location facilities.
That in turn provides us with greater knowledge and insight into the challenges that Internet users face every day. • Investments in our network for growth. We believe that the size, sophistication, and distributed nature of our network provide us with a significant competitive advantage.
That in turn provides us with greater knowledge and insight into the challenges that Internet users face every day. • Investments in our network for growth. We believe that the size, sophistication, and distributed nature of our global network provide us with a significant competitive advantage.
Loss on extinguishment of debt also consists of loss recognized from open market transactions to repurchase approximately $123.0 million in aggregate principal amount of the 2025 Notes for an aggregate of $172.7 million in cash (including accrued interest) (the 2025 Notes Repurchases).
Loss on Extinguishment of Debt Loss on extinguishment of debt consists of loss recognized from open market transactions to repurchase approximately $123.0 million in aggregate principal amount of the 2025 Notes for an aggregate of $172.7 million in cash (including accrued interest) (the 2025 Notes Repurchases).
Discussions of 2021 items and year-to-year comparisons between 2022 and 2021 are not included in this Form 10-K, and such disclosure can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, which information is incorporated herein by reference.
Discussions of 2022 items and year-to-year comparisons between 2023 and 2022 are not included in this Form 10-K, and such disclosure can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Part II, Item 7 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, which information is incorporated herein by reference.
As of December 31, 2023, our material cash requirements include contractual obligations from the 2026 Notes, purchase commitments and lease obligations. Refer to Notes 6, 7, and 8 to the consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K for more information regarding these material cash requirements.
As of December 31, 2024, our material cash requirements include contractual obligations from the 2026 Notes, purchase commitments and lease obligations. Refer to Notes 6, 7, and 8 to the consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K for more information regarding these material cash requirements.
Such estimates include, but are not limited to, allowance for doubtful accounts, deferred contract acquisitions costs, the period of benefit generated from the deferred contract acquisition costs, the capitalization and estimated useful life of internal-use software, valuation of acquired intangible assets, the assessment of recoverability of intangible assets and their estimated useful lives, useful lives of property and equipment, the determination of the incremental borrowing rate used for operating lease liabilities, the valuation and recognition of stock-based compensation awards, uncertain tax positions, and the recognition and measurement of current and deferred income tax assets and liabilities.
Such estimates include, but are not limited to, allowance for doubtful accounts, deferred contract acquisitions costs, the period of benefit generated from the deferred contract acquisition costs, the capitalization and estimated useful life of internal-use software, valuation of acquired intangible assets, the assessment of recoverability of intangible assets and their estimated useful lives, useful lives of property and equipment, the determination of the incremental borrowing rate used for operating lease 91 Table of contents liabilities, the valuation and recognition of stock-based compensation awards, uncertain tax positions, and the recognition and measurement of current and deferred income tax assets and liabilities.
Our actual results could vary as a result of, and our near- and long-term future capital requirements will depend on, many factors, including our growth rate, subscription renewal activity, the timing and extent of 87 Table of contents spending to support our infrastructure and research and development efforts, the expansion of sales and marketing activities, the timing of new introductions of products or features, the continuing market adoption of our global network and products, and the impact of macroeconomic conditions to our and our customers', vendors', and partners' businesses.
Our actual results could vary as a result of, and our near- and long-term future capital requirements will depend on, many factors, including our growth rate, subscription renewal activity, the timing and extent of spending to support our infrastructure and research and development efforts, the expansion of sales and marketing activities, the timing of new introductions of products or features, the continuing market adoption of our global network and products, and the impact of macroeconomic conditions to our and our customers', vendors', and partners' businesses.
Off-Balance Sheet Arrangements As of December 31, 2023, we did not have any relationships with unconsolidated organizations or financial partnerships, such as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.
Off-Balance Sheet Arrangements As of December 31, 2024, we did not have any relationships with unconsolidated organizations or financial partnerships, such as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.
Our Annualized Revenue metric also includes any usage charges by a customer during a period, which represents a small portion of our total revenue and may not be recurring. As a result, Annualized Revenue may be higher than actual revenue over the 79 Table of contents course of the year.
Our Annualized Revenue 81 Table of contents metric also includes any usage charges by a customer during a period, which represents a small portion of our total revenue and may not be recurring. As a result, Annualized Revenue may be higher than actual revenue over the course of the year.
In addition, other companies, including companies in our industry, may calculate similarly-titled non-GAAP measures 77 Table of contents differently or may use other measures to evaluate their performance, all of which could reduce the usefulness of our non-GAAP financial measures as tools for comparison.
In addition, other companies, including companies in our industry, may calculate similarly-titled non-GAAP measures differently 79 Table of contents or may use other measures to evaluate their performance, all of which could reduce the usefulness of our non-GAAP financial measures as tools for comparison.
The net cash outflow from changes in operating assets and liabilities was primarily the result of a $113.4 million increase in accounts receivable, net, which increased due to our growing customer base and timing of collections from our customers, a $101.5 million increase in deferred contract acquisition costs due to increased sales commissions from the addition of new customers, a $40.0 million increase in payments for operating lease liabilities, a $22.1 million increase in prepaid expenses and other current assets related to operating activities, which were partially offset by a $134.5 million increase in deferred revenue, a $25.8 million increase in accrued expenses and other current liabilities related to operating activities, and a $11.8 million increase in accounts payable related to operating activities.
The net cash outflow from changes in operating assets and liabilities was primarily the result of a $113.4 million increase in accounts receivable, net, which increased due to our growing customer base and timing of collections from our customers, a $101.5 million increase in deferred contract acquisition costs due to increased sales commissions from the addition of new customers, a $40.0 million increase in payments for operating lease liabilities, a $22.1 million increase in prepaid expenses and other current assets related to operating activities, which were partially offset by a $134.5 million increase in deferred revenue, a $21.8 million increase in accrued compensation, an $11.8 million increase in accounts payable related to operating activities, and a $4.0 million increase in accrued expenses and other current liabilities related to operating activities.
Opportunities, Challenges, and Risks 75 Table of contents We believe that the growth of our business and our future success are dependent upon many factors, including growing our paying customer base, particularly large customers, expanding our relationships with existing paying customers, developing and successfully launching new products and features, expanding into additional market segments, expanding our base of free customers, and developing and maintaining favorable peering and co-location relationships.
Opportunities, Challenges, and Risks We believe that the growth of our business and our future success are dependent upon many factors, including growing our paying customer base, particularly large customers, expanding our relationships with existing paying customers, developing and successfully launching new products and features, expanding into additional market segments, expanding our base of free customers, and developing and maintaining favorable peering and co-location relationships.
We believe macroeconomic uncertainty could persist through 2024. As a result, we expect that some or all of the negative trends described in this paragraph may emerge or recur during future quarters. To the extent challenging macroeconomic conditions persist, we may experience additional adverse effects on our business, financial condition, or results of operations in future periods.
We believe macroeconomic uncertainty could persist during 2025. As a result, we expect that some or all of the negative trends described in this paragraph may emerge or recur during future quarters. To the extent challenging macroeconomic conditions persist, we may experience additional adverse effects on our business, financial condition, or results of operations in future periods.
Recent Accounting Pronouncements Refer to Note 2 to our consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K for more information regarding recently adopted accounting pronouncements.
Recent Accounting Pronouncements Refer to Note 2 to the consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K for more information regarding recently adopted accounting pronouncements.
Our pay-as-you-go customers typically pay with a credit card on a monthly or annual basis for our Pro and Business subscription plans and on a monthly basis for our other pay-as-you-go plans and add-on products. 74 Table of contents Key elements of our business model include: • Significant investment in ongoing product development. We invest significantly in research and development.
Our pay-as-you-go customers typically pay with a credit card on a monthly or annual basis for our Pro and Business subscription plans and on a monthly basis for our other pay-as-you-go plans and add-on products. Key elements of our business model include: • Significant investment in ongoing product development. We invest significantly in research and development.
International markets represented 48%, 47% and 48% of our revenue in the years ended December 31, 2023, 2022, and 2021, respectively, and we intend to continue to invest in our international growth as a strategy to expand our customer base around the world. • Free customer base . Free customers are an important part of our business.
International markets represented 49%, 48%, and 47% of our revenue in the years ended December 31, 2024, 2023, and 2022, respectively, and we intend to continue to invest in our international growth as a strategy to expand our customer base around the world. • Free customer base . Free customers are an important part of our business.
For example, if free cash flow is negative, we may need to access cash reserves or other sources of capital to invest in strategic initiatives. One limitation of free cash flow and free cash flow margin is that they do not reflect our future contractual commitments.
For example, if free cash flow is negative, we may need to access cash reserves or other sources of capital to invest in strategic initiatives. One limitation of free cash flow and free cash flow margin is 80 Table of contents that they do not reflect our future contractual commitments.
Financing Activities Net cash used in financing activities of $192.2 million during the year ended December 31, 2023 was primarily due to $207.6 million of repayments of the 2025 Notes, $10.5 million of payments of indemnity holdback, and $8.0 million payment of tax withholding on Restricted Stock Unit (RSU) settlements, which were partially offset by $19.1 million proceeds from the issuance of Class A common stock pursuant to the 2019 Employee Stock Purchase Plan (ESPP) and $14.9 million of proceeds from the exercise of vested and unvested stock options.
Net cash used in financing activities of $192.2 million during the year ended December 31, 2023 was primarily due to $207.6 million of repayments of the 2025 Notes, $10.5 million of payments of indemnity holdback, and $8.0 million payment of tax withholding on RSU settlements, which were partially offset by $19.1 million proceeds from the issuance of Class A common stock pursuant to the ESPP and $14.9 million of proceeds from the exercise of vested and unvested stock options.
Our dollar-based net retention rates for the three months ended December 31, 2023, 2022, and 2021 were 115%, 122%, and 125%, respectively. Components of Our Results of Operations Revenue We generate revenue primarily from sales to our customers of subscriptions to access our network and products, together with related support services.
Our dollar-based net retention rates for the three months ended December 31, 2024, 2023, and 2022 were 111%, 115%, and 122%, respectively. Components of Our Results of Operations Revenue We generate revenue primarily from sales to our customers of subscriptions to access our network and products, together with related support services.
However, we expect to continue to benefit from economies of scale as our customers increase the use of our global network and products. We intend to continue to invest additional resources in our global network and products and our customer support organizations as we grow our business.
However, we expect to continue to benefit from economies of scale as our customers increase the use of our global network and products. We intend to continue to invest additional resources in our global network and products and our customer support 82 Table of contents organizations as we grow our business.
We are not aware of any specific event or circumstance that would require an update to our estimates or assumptions or a revision of the carrying value of assets or liabilities as of February 21, 2024, the date of issuance of this Annual Report on Form 10-K.
We are not aware of any specific event or circumstance that would require an update to our estimates or assumptions or a revision of the carrying value of assets or liabilities as of February 20, 2025, the date of issuance of this Annual Report on Form 10-K.
These free customers expose us to diverse traffic, threats, and problems, often allowing us to see potential security, performance, and reliability issues at the earliest stage. This knowledge allows us to improve our products and deliver more effective solutions to our paying customers.
These free customers expose us to diverse traffic, threats, and problems, often allowing us to see potential security, 76 Table of contents performance, and reliability issues at the earliest stage. This knowledge allows us to improve our products and deliver more effective solutions to our paying customers.
Interest Expense 81 Table of contents Interest expense consists primarily of contractual interest expense and amortization of the debt issuance costs on our 0.75% Convertible Senior Notes due 2025 (the 2025 Notes) and 0% Convertible Senior Notes due 2026 (the 2026 Notes, and together with the 2025 Notes, the Notes).
Interest Expense Interest expense consists primarily of contractual interest expense and amortization of the debt issuance costs on our 0.75% Convertible Senior Notes due 2025 (the 2025 Notes) and 0% Convertible Senior Notes due 2026 (the 2026 Notes, and together with the 2025 Notes, the Notes).
The level and timing of investment in these areas could affect our cost of revenue in the future. Gross Profit and Gross Margin 80 Table of contents Gross profit is revenue less cost of revenue and gross margin is gross profit as a percentage of revenue.
The level and timing of investment in these areas could affect our cost of revenue in the future. Gross Profit and Gross Margin Gross profit is revenue less cost of revenue and gross margin is gross profit as a percentage of revenue.
This section of this Form 10-K generally discusses 2023 and 2022 items and year-to-year comparisons between 2023 and 2022.
This section of this Form 10-K generally discusses 2024 and 2023 items and year-to-year comparisons between 2024 and 2023.
An entity is defined as a company, a government institution, a non-profit organization, or a distinct business unit of a large company. An active contract is defined as a customer relationship for which we have provided services during the quarter. The number of paying customers was 189,791, 162,086, and 140,096 as of December 31, 2023, 2022, and 2021, respectively.
An entity is defined as a company, a government institution, a non-profit organization, or a distinct business unit of a large company. An active contract is defined as a customer relationship for which we have provided services during the quarter. The number of paying customers was 237,714, 189,791, and 162,086 as of December 31, 2024, 2023, and 2022, respectively.
The number of paying customers with Annualized Revenue greater than $100,000 was 2,756, 2,042, and 1,416 as of December 31, 2023, 2022, and 2021, respectively. Dollar-Based Net Retention Rate Our ability to maintain long-term revenue growth and achieve profitability is dependent on our ability to retain and grow revenue generated from our existing paying customers.
The number of paying customers with Annualized Revenue greater than $100,000 was 3,497, 2,756, and 2,042 as of December 31, 2024, 2023, and 2022, respectively. Dollar-Based Net Retention Rate Our ability to maintain long-term revenue growth and achieve profitability is dependent on our ability to retain and grow revenue generated from our existing paying customers.
Loss on Extinguishment of Debt Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) Loss on extinguishment of debt $ (50,300) $ — $ (50,300) * ______________ * Not meaningful Loss on extinguishment of debt increased by $50.3 million for the year ended December 31, 2023 as compared to the year ended December 31, 2022.
Loss on Extinguishment of Debt Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) Loss on extinguishment of debt $ — $ (50,300) $ 50,300 * ______________ * Not meaningful Loss on extinguishment of debt decreased by $50.3 million for the year ended December 31, 2024 as compared to the year ended December 31, 2023.
Starting in the first half of 2022, potentially as a result of these various macroeconomic impacts on our customers, we periodically have experienced lengthening of the average sales cycle for certain types of customers and sales (including sales to new customers and expansion sales to existing customers), slowdowns in our pipeline of potential new customers and in the rate of converting sales pipeline opportunities into new sales, increase in average days sales outstanding, higher levels of churn in our paying customer base (which is when any of our paying customers cease to be a paying customer for any reason, including any pay-as-you-go customer converting to a free subscription plan), and lengthening of the timing of payment from some of our customers, all of which may have contributed to a slowdown in our revenue growth over that period (including with respect to new customers).
Potentially as a result of these various macroeconomic impacts on our customers, we periodically have experienced lengthening of the average sales cycle for certain types of customers and sales (including sales to new customers and expansion sales to existing customers), slowdowns in our pipeline of potential new customers and in the rate of converting sales pipeline opportunities into new sales, increases in average days sales outstanding, higher levels of churn in our paying customer base (which is when any of our paying customers cease to be a paying customer for any reason, including any pay-as-you-go customer converting to a free subscription plan), and lengthening of the timing of payment from some of our customers, all of which may have contributed to a slowdown in our revenue growth from prior periods (including with respect to new customers).
The increase in revenue was primarily due to the addition of new paying customers, which increased by 17% during the year ended December 31, 2023, as well as expansion within our existing paying customers, which was reflected by our dollar-based net retention rate of 115% for the three months ended December 31, 2023.
The increase in revenue was primarily due to the addition of new paying customers, which increased by 25% during the year ended December 31, 2024, as well as expansion within our existing paying customers, which was reflected by our dollar-based net retention rate of 111% for the three months ended December 31, 2024.
We believe that our existing cash, cash equivalents, and available-for-sale securities will be sufficient to meet our working capital and capital expenditure needs for at least the next 12 months.
We believe that our existing cash, cash equivalents, available-for-sale securities, and available capacity under the Revolving Credit Facility will be sufficient to meet our working capital and capital expenditure needs for at least the next 12 months.
Non-Operating Income (Expense) Interest Income Interest income consists primarily of interest earned on our cash, cash equivalents, and our investment holdings.
Non-Operating Income (Expense) Interest Income 83 Table of contents Interest income consists primarily of interest earned on our cash, cash equivalents, and our investment holdings.
Our global network, with a presence in more than 310 cities and over 120 countries worldwide, has helped to foster our strong international growth.
Our global network, with a presence in more than 335 cities and over 125 countries worldwide, has helped to foster our strong international growth.
As of December 31, 2023, our investment portfolio consisted of investment grade securities with an average credit rating of AA. We have generated significant operating losses from our operations as reflected in our accumulated deficit of $1,023.8 million as of December 31, 2023.
As of December 31, 2024, our investment portfolio consisted of investment grade securities with an average credit rating of AA. We have generated significant operating losses from our operations as reflected in our accumulated deficit of $1,102.6 million as of December 31, 2024.
The ASU is effective for annual periods beginning after December 15, 2023, and for interim periods beginning after December 15, 2024, with early adoption permitted. We are currently evaluating the impact of the new standard.
The ASU is effective for annual reporting periods beginning after December 15, 2026, and for interim reporting periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact of the new standard.
The increase was driven by the loss on extinguishment of debt we recognized in connection with the 2025 Notes Repurchases. Refer to Note 7 to the consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K.
The decrease was driven by the loss on extinguishment of debt we recognized in connection with the 2025 Notes Repurchases during the year ended December 31, 2023. Refer to Note 7 to the consolidated financial statements in Part II, Item 8 of this Annual Report on Form 10-K.
Weak economic conditions or significant uncertainty regarding the stability of financial markets related to stock market volatility, inflation, recession, changes in tariffs, trade agreements or governmental fiscal, monetary and tax policies, among others, could adversely impact our and our customers’ business, financial condition and operating results.
Weak economic conditions or uncertainty regarding the stability of financial markets related to stock market volatility, inflation, recession, threats of tariffs and other impediments to cross-border trade, trade agreements or governmental fiscal, monetary and tax policies, among others, also could adversely impact our and our customers’ business, financial condition and operating results.
The income tax expense of $2.6 million for the year ended December 31, 2022 was primarily related to withholding taxes in the United States and income tax expense from profitable foreign jurisdictions, offset by the partial release of the U.S. valuation allowance in connection with acquisitions.
The income tax expense of $7.9 million for the year ended December 31, 2024 was primarily related to withholding taxes in the United States and income tax expense from profitable foreign jurisdictions, offset by the partial release of the U.S. and U.K. valuation allowances in connection with acquisitions.
For the period beyond the next 12 months, we believe we will be able to meet our working capital and capital expenditure needs from our existing cash, cash equivalents, and available-for-sale-securities, the cash flows from our operating activities and, if necessary, proceeds from potential equity or debt financings.
For the period beyond the next 12 months, we believe we will be able to meet our working capital and capital expenditure needs from our existing cash, cash equivalents, available-for-sale-securities, available 89 Table of contents borrowings under the Revolving Credit Facility, the cash flows from our operating activities and, if necessary, proceeds from other potential equity or debt financings.
During the three months ended September 30, 2023, we settled conversions of the remaining $35.4 million aggregated principal amount outstanding of the 2025 Notes in a combination of $35.4 million cash and approximately 0.5 million shares of our Class A common stock.
Subsequently, in July 2023, we settled conversions of the remaining $35.4 million aggregated principal amount outstanding of the 2025 Notes in a combination of $35.4 million cash and approximately 0.5 million shares of our Class A common stock.
The following table summarizes the revenue by region based on the billing address of customers who use the Company’s products: Year Ended December 31, 2023 2022 2021 (dollars in thousands) Amount Percentage of Revenue Amount Percentage of Revenue Amount Percentage of Revenue United States $ 678,184 52 % $ 515,722 53 % $ 342,578 52 % Europe, Middle East, and Africa 356,569 28 % 258,291 26 % 172,129 26 % Asia Pacific 168,826 13 % 133,353 14 % 96,537 15 % Other 93,166 7 % 67,875 7 % 45,182 7 % Total $ 1,296,745 100 % $ 975,241 100 % $ 656,426 100 % Non-GAAP Financial Measures In addition to our results determined in accordance with generally accepted accounting principles in the United States (U.S.
The following table summarizes the revenue by region based on the billing address of customers who use the Company’s products: Year Ended December 31, 2024 2023 2022 (dollars in thousands) Amount Percentage of Revenue Amount Percentage of Revenue Amount Percentage of Revenue United States $ 849,500 51 % $ 678,184 52 % $ 515,722 53 % Europe, Middle East, and Africa 466,499 28 % 356,569 28 % 258,291 26 % Asia Pacific 223,234 13 % 168,826 13 % 133,353 14 % Other 130,393 8 % 93,166 7 % 67,875 7 % Total $ 1,669,626 100 % $ 1,296,745 100 % $ 975,241 100 % Non-GAAP Financial Measures In addition to our results determined in accordance with generally accepted accounting principles in the United States (U.S.
Liquidity and Capital Resources Since our inception, we have financed our operations primarily through net proceeds from the sale of our equity and debt securities, as well as payments received from customers using our global network and products, and we expect to continue to finance our operations using the same sources for the foreseeable future.
Liquidity and Capital Resources Since our inception, we have financed our operations primarily through net proceeds from the sale of our equity and debt securities, as well as cash flow from our operating activities, and we expect to continue to finance our operations using the same sources for the foreseeable future.
Year Ended December 31, 2023 2022 2021 (dollars in thousands) Loss from operations $ (185,485) $ (201,203) $ (127,684) Add: Stock-based compensation expense and related employer payroll taxes 287,500 217,766 117,334 Amortization of acquired intangible assets 20,002 15,169 2,946 Acquisition-related and other expenses — 3,947 380 Non-GAAP income (loss) from operations $ 122,017 $ 35,679 $ (7,024) Operating margin (14) % (21) % (19) % Non-GAAP operating margin (non-GAAP income (loss) from operations as a percentage of revenue) 9 % 4 % (1) % Free Cash Flow and Free Cash Flow Margin Free cash flow is a non-GAAP financial measure that we calculate as net cash provided by (used in) operating activities less cash used for purchases of property and equipment and capitalized internal-use software.
Year Ended December 31, 2024 2023 2022 (dollars in thousands) Loss from operations $ (154,761) $ (185,485) $ (201,203) Add: Stock-based compensation expense and related employer payroll taxes 356,423 287,500 217,766 Amortization of acquired intangible assets 12,747 20,002 15,169 Acquisition-related and other expenses 702 — 3,947 One-time compensation charge 15,000 — — Non-GAAP income from operations $ 230,111 $ 122,017 $ 35,679 Operating margin (9) % (14) % (21) % Non-GAAP operating margin (non-GAAP income from operations as a percentage of revenue) 14 % 9 % 4 % Free Cash Flow and Free Cash Flow Margin Free cash flow is a non-GAAP financial measure that we calculate as net cash provided by operating activities less cash used for purchases of property and equipment and capitalized internal-use software.
During the three months ended June 30, 2023, we repurchased approximately $123.0 million in aggregate principal amount of the 2025 Notes for $172.7 million in cash (including accrued interest).
In May 2023, we repurchased approximately $123.0 million in aggregate principal amount of the 2025 Notes for $172.7 million in cash (including accrued interest).
Operating Expenses Sales and Marketing Sales and marketing expenses consist primarily of employee-related costs, including salaries, benefits, and stock-based compensation expense, sales commissions that are recognized as expenses over the period of benefit, marketing programs, certificate authority services costs for free customers, travel-related expenses, bandwidth and co-location costs for free customers, and allocated overhead costs.
Operating Expenses Sales and Marketing Sales and marketing expenses consist primarily of employee-related costs, including salaries, a one-time cash compensation charge incurred during the three months ended March 31, 2024, benefits, and stock-based compensation expense, sales commissions that are recognized as expenses over the period of benefit, marketing programs, certificate authority services costs for free customers, travel-related expenses, bandwidth and co-location costs for free customers, and allocated overhead costs.
The remainder of the increase was primarily due to an increase of $15.7 million in expenses for marketing programs due to investments in brand awareness advertising, third-party industry events, and digital performance marketing, an increase of $13.0 million in co-location and bandwidth expenses for free customers, an increase of $6.9 million in travel-related expenses, an increase of $3.6 million in allocated overhead costs, an increase of $2.8 million in subscriptions expenses, and an increase of $1.4 million in consulting expenses.
The remainder of the increase was primarily due to an increase of $24.5 million in expenses for marketing programs due to acquisitions, investments in brand awareness advertising, third-party industry events, and digital performance marketing, an increase of $9.7 million in co-location and bandwidth expenses for free customers, an increase of $7.2 million in travel-related expenses, an increase of $5.8 million in consulting expenses, and an increase of $4.1 million in subscription expenses.
The increase was primarily driven by $86.1 million in increased employee-related costs due to a 15% increase in headcount in our sales and marketing organization, including an increase of $26.2 million in stock-based compensation expense.
The increase was primarily driven by $90.9 million in increased employee-related costs due to an 11% increase in headcount in our sales and marketing organization, including an increase of $19.2 million in stock-based compensation expense, and a $15.0 million one-time compensation charge.
Impact of Macroeconomic Developments We are closely monitoring macroeconomic developments and global events, such as the Hamas-Israel and the Russia-Ukraine conflicts and the potential expansion of those conflicts and other areas of geopolitical tension around the world, and how they may adversely impact our and our customers’ businesses.
Impact of Macroeconomic Developments We are closely monitoring macroeconomic developments and global events, such as the conflicts in the Middle East and Ukraine and the potential worsening or expansion of those conflicts and other areas of geopolitical tension around the world, and other geopolitical events such as elections and other governmental changes, and, in each case, how they may adversely impact our and our customers’ businesses.
Cash Flows The following table summarizes our cash flows for the periods presented: Year Ended December 31, 2023 2022 2021 (in thousands) Net cash provided by operating activities $ 254,406 $ 123,595 $ 64,648 Net cash used in investing activities $ (186,201) $ (235,696) $ (709,322) Net cash provided by (used in) financing activities $ (192,185) $ 6,347 $ 847,486 Operating Activities Net cash provided by operating activities during the year ended December 31, 2023 was $254.4 million, which resulted from a net loss of $183.9 million, adjusted for non-cash charges of $543.1 million and net cash outflow of $104.7 million from changes in operating assets and liabilities.
Cash Flows The following table summarizes our cash flows for the periods presented: Year Ended December 31, 2024 2023 2022 (in thousands) Net cash provided by operating activities $ 380,429 $ 254,406 $ 123,595 Net cash used in investing activities $ (330,224) $ (186,201) $ (235,696) Net cash provided by (used in) financing activities $ 12,785 $ (192,185) $ 6,347 Operating Activities Net cash provided by operating activities during the year ended December 31, 2024 was $380.4 million, which resulted from a net loss of $78.8 million, adjusted for non-cash charges of $568.2 million and net cash outflow of $108.9 million from changes in operating assets and liabilities.
Usage-based consideration is primarily related to fees charged for our customer’s use of excess bandwidth when accessing our network in a given period and is recognized as revenue in the period in which the usage occurs.
Usage-based consideration is primarily related to fees charged for our customer’s use of excess bandwidth when accessing our network in a given period and is recognized as revenue in the period in which the usage occurs. The subscription and support term contracts for the Company’s contracted customers, typically range from one to three years.
In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures , which requires an entity, on an annual basis, to disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures.
Recently Issued Accounting Pronouncements Not Yet Effective In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures , which requires an entity, on an annual basis, to disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid.
The increase in the cost of revenue was primarily due to an increase of $24.2 million in expenses related to operating in co-location facilities and network and bandwidth costs for operating our global 84 Table of contents network for our expanded customer base, as well as increased capacity to support our growth, an increase of $17.4 million in depreciation expense related to purchases of equipment located in co-location facilities, an increase of $14.2 million in third-party technology services costs, registry fees, and payment processing fees, and an increase of $10.1 million in employee-related costs due to a 41% increase in headcount in our customer support and technical operations organizations.
The increase in the cost of revenue was primarily due to an increase of $32.6 million of third-party technology services costs, registry expenses, and payment processing fees, an increase of $23.9 million in expenses related to operating in co-location facilities and network and bandwidth costs for operating our global network for our expanded customer base, as well as increased capacity to support our growth, an increase of $15.4 86 Table of contents million in employee-related costs, and an increase of $2.1 million in purchases of computer equipment and supplies.
The increase was primarily driven by an increase in interest rates. ______________ * Not meaningful Interest Expense Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) Interest expense $ (5,872) $ (4,984) $ (888) 18 % Interest expense did not significantly fluctuate during the year ended December 31, 2023 as compared to the year ended December 31, 2022.
The increase was primarily driven by an increase in interest rates and investment balance. Interest Expense Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) Interest expense $ (5,196) $ (5,872) $ 676 (12) % Interest expense did not significantly fluctuate during the year ended December 31, 2024 as compared to the year ended December 31, 2023.
Year Ended December 31, 2023 2022 2021 (dollars in thousands) Gross profit $ 989,740 $ 742,631 $ 509,292 Gross margin 76 % 76 % 78 % Loss from operations $ (185,485) $ (201,203) $ (127,684) Non-GAAP income (loss) from operations $ 122,017 $ 35,679 $ (7,024) Operating margin (14) % (21) % (19) % Non-GAAP operating margin 9 % 4 % (1) % Net cash provided by operating activities $ 254,406 $ 123,595 $ 64,648 Net cash used in investing activities $ (186,201) $ (235,696) $ (709,322) Net cash provided by (used in) financing activities $ (192,185) $ 6,347 $ 847,486 Free cash flow $ 119,464 $ (39,769) $ (43,090) Net cash provided by operating activities (as a percentage of revenue) 20 % 13 % 10 % Free cash flow margin 9 % (4) % (7) % Paying customers (1) 189,791 162,086 140,096 Paying customers (> $100,000 Annualized Revenue) (1) 2,756 2,042 1,416 (1) Key business metrics are derived on a quarterly basis.
Year Ended December 31, 2024 2023 2022 (dollars in thousands) Gross profit $ 1,290,924 $ 989,740 $ 742,631 Gross margin 77 % 76 % 76 % Loss from operations $ (154,761) $ (185,485) $ (201,203) Non-GAAP income from operations $ 230,111 $ 122,017 $ 35,679 Operating margin (9) % (14) % (21) % Non-GAAP operating margin 14 % 9 % 4 % Net cash provided by operating activities $ 380,429 $ 254,406 $ 123,595 Net cash used in investing activities $ (330,224) $ (186,201) $ (235,696) Net cash provided by (used in) financing activities $ 12,785 $ (192,185) $ 6,347 Free cash flow $ 166,915 $ 119,464 $ (39,769) Net cash provided by operating activities (as a percentage of revenue) 23 % 20 % 13 % Free cash flow margin 10 % 9 % (4) % Paying customers (1) 237,714 189,791 162,086 Paying customers (> $100,000 Annualized Revenue) (1) 3,497 2,756 2,042 (1) Key business metrics are derived on a quarterly basis.
The net cash 88 Table of contents outflow from changes in operating assets and liabilities was primarily the result of a $67.9 million increase in deferred contract acquisition costs due to increased sales commissions from the addition of new customers, a $56.2 million increase in accounts receivable, net, which increased due to our growing customer base and timing of collections from our customers, a $31.7 million decrease in operating lease liabilities, a $9.6 million decrease in accounts payable related to operating activities, a $7.7 million increase in prepaid expenses and other current assets related to operating activities, a $5.4 million decrease in accrued expenses and other current liabilities related to operating activities, and a $2.2 million increase in contract assets, which were partially offset by a $102.2 million increase in deferred revenue.
The net cash outflow from changes in operating assets and liabilities was primarily the result of a $116.8 million increase in deferred contract acquisition costs due to the addition of new customers, a $78.5 million increase in accounts receivable, net, which increased due to our growing customer base and timing of collections from our customers, $55.2 million increase in payments for operating lease liabilities, a $38.2 million increase in prepaid expenses and other current assets, and a $5.5 million increase in contract assets, which were partially offset by a $135.0 million increase in deferred revenue, an $18.7 million increase in accrued compensation, an $18.6 million increase in accounts payable, and a $9.9 million increase in accrued expenses and other current liabilities.
The typical subscription and support term for our contracted customers is one year and subscription and support term lengths range from one to three years. Most of our contracts with contracted customers are non-cancelable over the contractual term. Customers may have the right to terminate their contracts for cause if we fail to perform in accordance with the contractual terms.
Most of our contracts with contracted customers are non-cancelable over the contractual term. Customers may have the right to terminate their contracts for cause if we fail to perform in accordance with the contractual terms. For our pay-as-you-go customers, subscription and support term contracts are typically monthly.
Due in part to the Hamas-Israel and Russia-Ukraine conflicts, and other geopolitical and macroeconomic conditions, there is ongoing uncertainty and significant 89 Table of contents disruption in the global economy and financial markets.
Due in part to the conflicts in the Middle East and Ukraine, and the potential worsening and expansion of such conflicts, and other geopolitical and macroeconomic conditions, there is ongoing uncertainty and significant disruption in the global economy and financial markets.
Pay-as-you-go customers can subscribe to more than one solution and purchase add-on products and network functionality we offer to meet their more advanced needs. For pay-as-you-go or contracted customers who need a scalable Zero Trust security solution to secure users and internal resources using our Cloudflare One suite of products, we make these products available on a per seat basis.
For pay-as-you-go or contracted customers who need a scalable Zero 75 Table of contents Trust security solution to secure users and internal resources using our Zero Trust and network services solutions, we make these products available on a per seat basis.
Additionally, free cash flow does not represent the total increase or decrease in our cash balance for a given period. 78 Table of contents Year Ended December 31, 2023 2022 2021 (dollars in thousands) Net cash provided by operating activities $ 254,406 $ 123,595 $ 64,648 Less: Purchases of property and equipment (114,396) (143,606) (92,986) Less: Capitalized internal-use software (20,546) (19,758) (14,752) Free cash flow $ 119,464 $ (39,769) $ (43,090) Net cash used in investing activities $ (186,201) $ (235,696) $ (709,322) Net cash provided by (used in) financing activities $ (192,185) $ 6,347 $ 847,486 Net cash provided by operating activities (as a percentage of revenue) 20 % 13 % 10 % Less: Purchases of property and equipment (as a percentage of revenue) (9) % (15) % (14) % Less: Capitalized internal-use software (as a percentage of revenue) (2) % (2) % (2) % Free cash flow margin 9 % (4) % (7) % Key Business Metrics In addition to our results determined in accordance with U.S.
Year Ended December 31, 2024 2023 2022 (dollars in thousands) Net cash provided by operating activities $ 380,429 $ 254,406 $ 123,595 Less: Purchases of property and equipment (185,037) (114,396) (143,606) Less: Capitalized internal-use software (28,477) (20,546) (19,758) Free cash flow $ 166,915 $ 119,464 $ (39,769) Net cash used in investing activities $ (330,224) $ (186,201) $ (235,696) Net cash provided by (used in) financing activities $ 12,785 $ (192,185) $ 6,347 Net cash provided by operating activities (as a percentage of revenue) 23 % 20 % 13 % Less: Purchases of property and equipment (as a percentage of revenue) (11) % (9) % (15) % Less: Capitalized internal-use software (as a percentage of revenue) (2) % (2) % (2) % Free cash flow margin 10 % 9 % (4) % Key Business Metrics In addition to our results determined in accordance with U.S.
Cost of Revenue and Gross Margin Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) Cost of revenue $ 307,005 $ 232,610 $ 74,395 32 % Gross margin 76 % 76 % Cost of revenue increased by $74.4 million, or 32%, for the year ended December 31, 2023 compared to the year ended December 31, 2022.
Cost of Revenue and Gross Margin Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) Cost of revenue $ 378,702 $ 307,005 $ 71,697 23 % Gross margin 77 % 76 % Cost of revenue increased by $71.7 million, or 23%, for the year ended December 31, 2024 compared to the year ended December 31, 2023.
The increase was primarily driven by $55.1 million in increased employee-related costs due to a 11% increase in headcount in our research and development organization, including an increase of $30.3 million in stock-based compensation expense. The remainder of the increase was primarily due to an increase of $3.3 million in allocated overhead costs.
The increase was primarily driven by $64.3 million in increased employee-related costs due to a 25% increase in headcount in our research and development organization, including an increase of $15.4 million in stock-based compensation expense, and an increase of $4.5 million in subscription expenses, partially offset by increased capitalized internal-use software development costs of $11.1 million.
Net cash provided by operating activities during the year ended December 31, 2022 was $123.6 million, which resulted from a net loss of $193.4 million, adjusted for non-cash charges of $396.3 million and net cash outflow of $79.3 million from changes in operating assets and liabilities.
Net cash provided by operating activities during the year ended December 31, 2023 was $254.4 million, which resulted from a net loss of $183.9 million, adjusted for non-cash charges of $543.1 million and net cash outflow of 90 Table of contents $104.7 million from changes in operating assets and liabilities.
Operating Expenses Sales and Marketing Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) Sales and marketing $ 599,117 $ 465,762 $ 133,355 29 % Sales and marketing expenses increased by $133.4 million, or 29%, for the year ended December 31, 2023 compared to the year ended December 31, 2022.
Operating Expenses Sales and Marketing Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) Sales and marketing $ 745,791 $ 599,117 $ 146,674 24 % Sales and marketing expenses increased by $146.7 million, or 24%, for the year ended December 31, 2024 compared to the year ended December 31, 2023.
In addition to the contractual obligations described above, as of December 31, 2023, we had $4.4 million recognized as total restricted cash on our consolidated balance sheets which mainly related to irrevocable standby letters of credit and bank guarantees that are required under lease agreements and indemnity holdback consideration associated with asset acquisitions.
In addition to the contractual obligations described above, as of December 31, 2024, we had $6.5 million recognized as total restricted cash on our consolidated balance sheets mainly related to indemnity holdback consideration associated with asset acquisitions and business combinations.
As such, we are focused on driving an increased number of customers onto our network and products to support our long-term growth. We continue to invest to build our direct sales force, increase brand awareness, leverage and expand channel partners, and improve the sophistication of our sales operations for contracted customers, particularly large customers.
We continue to invest to build our direct sales force, increase brand awareness, leverage and expand channel partners, and improve the sophistication of our sales operations for contracted customers, particularly large customers.
These effects could include, among others, reduction or increased delays in purchasing decisions by existing and potential new paying customers, additional lengthening of the sales cycle for some of our existing and potential new paying customers, potential customer requests for concessions (including in terms of payment amounts and/or timing and earlier or additional termination rights), potential losses of paying customers as a result of economic distress or bankruptcy (particularly among our small and medium paying customer base), potential reductions in new non-U.S. customers and expansion of sales to existing non-U.S. paying customers as a result of our products, which are substantially all sold in U.S. dollars, becoming relatively more expensive for such customers due to the higher value of the U.S. dollar relative to other currencies, and increased costs for employee compensation and equipment purchases resulting from continued inflationary cost pressures.
These effects could include, among others, reduction or increased delays in purchasing decisions by existing and potential new paying customers, additional lengthening of the sales cycle for some of our existing and potential new paying customers, potential customer requests for concessions (including in terms of payment amounts and/or timing and earlier or additional termination rights), potential losses of paying customers as a result of economic distress or bankruptcy (particularly among our small and medium paying customer base), potential reductions in new non-U.S. customers and expansion of sales to existing non-U.S. paying customers as a result of our products, which are substantially all sold in U.S. dollars, becoming relatively more expensive for such customers due to the higher value of the U.S. dollar relative to other currencies, and increased costs for employee compensation and equipment purchases resulting from continued inflationary cost pressures. 77 Table of contents For further discussion of the challenges and risks we confront related to macroeconomic conditions and geopolitical tension around the world, please refer to Part I, Item 1A “Risk Factors” of this Annual Report on Form 10-K. 78 Table of contents Financial Measures and Key Business Metrics We review a number of financial and operating metrics, including the following non-GAAP financial measures and key metrics to evaluate our business, measure our performance, identify trends affecting our business, formulate business plans, and make strategic decisions.
The ASU is effective for annual periods beginning after December 15, 2024. We are currently evaluating the impact of the new standard.
The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. The ASU is effective for annual periods beginning after December 15, 2024. We are currently evaluating the impact of the new standard.
Research and Development Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) Research and development $ 358,143 $ 298,303 $ 59,840 20 % Research and development expenses increased by $59.8 million, or 20%, for the year ended December 31, 2023 compared to the year ended December 31, 2022.
Research and Development Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) Research and development $ 421,374 $ 358,143 $ 63,231 18 % Research and development expenses increased by $63.2 million, or 18%, for the year ended December 31, 2024 compared to the year ended December 31, 2023.
General and Administrative Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) General and administrative $ 217,965 $ 179,769 $ 38,196 21 % General and administrative expenses increased by $38.2 million, or 21%, for the year ended December 31, 2023 compared to the year ended December 31, 2022.
General and Administrative Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) General and administrative $ 278,520 $ 217,965 $ 60,555 28 % General and administrative expenses increased by $60.6 million, or 28%, for the year ended December 31, 2024 compared to the year ended December 31, 2023.
Net cash provided by financing activities of $6.3 million during the year ended December 31, 2022 was primarily due to $15.3 million proceeds from the issuance of Class A common stock pursuant to the ESPP and $10.1 million of proceeds from the exercise of vested and unvested stock options, which were partially offset by $16.6 million of repayments of the 2025 Notes, and $2.5 million payment of tax withholding on RSU settlements.
Financing Activities Net cash provided by financing activities of $12.8 million during the year ended December 31, 2024 was primarily due to $19.8 million proceeds from the issuance of Class A common stock pursuant to the 2019 Employee Stock Purchase Plan (ESPP) and $12.9 million of proceeds from the exercise of vested stock options, which were partially offset by $16.8 million payment of tax withholding on Restricted Stock Unit (RSU) settlements, and $2.1 million cash paid for issuance costs on revolving credit facility.
As of December 31, 2023, we had cash and cash equivalents of $86.9 million, including $19.5 million held by our foreign subsidiaries. Our cash and cash equivalents primarily consist of cash and highly liquid money market funds. We also had available-for-sale securities of $1,586.9 million consisting of U.S. treasury securities, commercial paper, and corporate bonds.
Our cash and cash equivalents primarily consist of cash and highly liquid money market funds and U.S. treasury securities. We also had available-for-sale securities of $1,708.2 million consisting of corporate bonds, U.S. treasury securities, U.S. government agency securities, and commercial paper.
Non-Operating Income (Expense) Interest Income Year Ended December 31, Change 2023 2022 $ % (dollars in thousands) Interest income $ 68,167 $ 14,877 $ 53,290 * Interest income increased by $53.3 million, for the year ended December 31, 2023 compared to the year ended December 31, 2022.
Non-Operating Income (Expense) 87 Table of contents Interest Income Year Ended December 31, Change 2024 2023 $ % (dollars in thousands) Interest income $ 87,426 $ 68,167 $ 19,259 28 % Interest income increased by $19.3 million, or 28%, for the year ended December 31, 2024 compared to the year ended December 31, 2023.
The increase was primarily driven by $30.3 million in increased employee-related costs due to a 10% increase in headcount in our general and administrative organization, including an increase of $14.9 million in stock-based compensation expense.
The increase was primarily driven by $48.9 million in increased employee-related costs due to a 21% increase in headcount in our general and administrative organization, including an increase of $33.1 million in stock-based compensation expense. The remainder of the increase was primarily due to an increase of $6.1 million in professional fees for third-party accounting, consulting, and legal services.