Basis of Presentation and Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation of Unaudited Interim Financial Information	Our consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) regarding interim financial information. Our consolidated financial statements include the accounts of Reddit, Inc. and our wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Certain information and disclosures normally included in the annual consolidated financial statements prepared in accordance with U.S. GAAP have been omitted. Accordingly, the unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the SEC on February 13, 2025 (our “Annual Report”). The unaudited interim consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and reflect, in our opinion, all the adjustments of a normal, recurring nature that are necessary for the fair statement of our financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the results expected for the full year or any other period.
Basis of Presentation of Unaudited Interim Financial Information	Our consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) regarding interim financial information. Our consolidated financial statements include the accounts of Reddit, Inc. and our wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Certain information and disclosures normally included in the annual consolidated financial statements prepared in accordance with U.S. GAAP have been omitted. Accordingly, the unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the SEC on February 13, 2025 (our “Annual Report”). The unaudited interim consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and reflect, in our opinion, all the adjustments of a normal, recurring nature that are necessary for the fair statement of our financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the results expected for the full year or any other period.
Use of Estimates	The preparation of the unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Management’s estimates are based on historical information available as of the date of the consolidated financial statements and various other assumptions that we believe are reasonable under the circumstances. Actual results could differ materially from those estimates. Significant estimates relate primarily to determining the fair value of stock-based awards, the fair value of assets and liabilities assumed in business combinations, and the incremental borrowing rate used to determine operating lease right-of-use assets and lease liabilities. On an ongoing basis, management evaluates our estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities.
Functional Currency	Generally, the U.S. dollar is the functional currency for our subsidiaries, and therefore, foreign currency denominated monetary assets and liabilities are remeasured into U.S. dollars at exchange rates at the balance sheet date and foreign currency denominated non-monetary assets and liabilities are remeasured into U.S. dollars at historical exchange rates. Gains or losses from foreign currency remeasurement and settlements are included in other income (expense), net in the consolidated statements of operations. For those foreign subsidiaries where the local currency is the functional currency, we translate the financial statements to U.S. dollars at exchange rates at the balance sheet date for assets and liabilities and at monthly average exchange rates for revenues and expenses. Translation gains and losses are recorded in accumulated other comprehensive income (loss) as a component of stockholders’ equity (deficit). Net foreign exchange gains and losses were not material for the three months ended March 31, 2025 and 2024.
Concentration of Credit Risk	Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash and cash equivalents, restricted cash, marketable securities, and accounts receivable. We maintain cash and cash equivalents with several financial institutions. We believe that the financial institutions that hold our cash and cash equivalents are financially sound and, accordingly, minimal credit risks exist with respect to these balances. We maintain investments in U.S. and non-U.S. government securities, investment-grade corporate and government agency securities, certificates of deposit, commercial paper, and money market accounts that carry high credit ratings and accordingly, minimal credit risk exists with respect to these balances.
Recently Adopted Accounting Pronouncements / Accounting Pronouncements Not Yet Adopted	In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires an entity to disclose specific categories in the effective tax rate reconciliation as well as provide additional information for reconciling items that meet a quantitative threshold. This standard also requires certain disaggregated disclosures related to income from continuing operations, income tax expense, and income taxes paid. We adopted this standard effective January 1, 2025. Adoption of this standard will result in additional disclosures in our annual consolidated financial statements, but did not impact these unaudited interim consolidated financial statements. Accounting Pronouncements Not Yet Adopted In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires an entity to disclose disaggregated information about certain income statement expense line items. The standard is effective for us beginning January 1, 2027, with early adoption permitted. We are currently evaluating the impact the adoption will have on our disclosures.
Net Income (Loss) per Share	We compute net income (loss) per share of Class A and Class B common stock using the two-class method required for multiple classes of common stock and participating securities. Prior to our initial public offering (“IPO”) in March 2024, our participating securities included Series A, Series A-1, Series B, Series C, Series D, Series D-1, Series E, Series F, and Series F-1 convertible preferred stock, as the holders of these series of preferred stock were entitled to receive noncumulative dividends subject to certain requirements at an annual rate of 8% of the respective original issue price then in effect in the event that a dividend was paid on common stock. In connection with our IPO, our Series A, Series A-1, Series B, Series C, Series D, Series D-1, Series E, and Series F preferred stock converted on a one-to-one basis into 67,917,432 shares of Class B common stock, and our Series F-1 preferred stock converted on a one-to-one basis into 5,104,017 shares of Class A common stock. These shares are weighted in the denominator of net income (loss) per share for Class A and Class B common stock for the portion of the time outstanding subsequent to our IPO.
Fair Value Measurements	Fair value is defined as the price that would be received to sell an asset in an orderly transaction between market participants at the measurement date. To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs to valuation methodologies used to measure fair value: •Level 1: Quoted market prices in active markets for identical assets or liabilities •Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data •Level 3: Unobservable inputs reflecting the reporting entity’s own assumptions or external inputs from inactive markets We classify our cash equivalents and marketable securities within Level 1 or Level 2 because we use quoted market prices or alternative pricing sources and models utilizing market observable inputs to determine their fair value. There were no transfers between levels during the periods presented.

Basis of Presentation and Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation of Unaudited Interim Financial Information

Our consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and applicable rules and regulations of the U.S. Securities and Exchange Commission (the “SEC”) regarding interim financial information. Our consolidated financial statements include the accounts of Reddit, Inc. and our wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Certain information and disclosures normally included in the annual consolidated financial statements prepared in accordance with U.S. GAAP have been omitted. Accordingly, the unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2024, as filed with the SEC on February 13, 2025 (our “Annual Report”). The unaudited interim consolidated financial statements have been prepared on the same basis as the audited consolidated financial statements and reflect, in our opinion, all the adjustments of a normal, recurring nature that are necessary for the fair statement of our financial position, results of operations, and cash flows for the interim periods, but are not necessarily indicative of the results expected for the full year or any other period.

Basis of Presentation of Unaudited Interim Financial Information

Use of Estimates

The preparation of the unaudited consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements and accompanying notes. Management’s estimates are based on historical information available as of the date of the consolidated financial statements and various other assumptions that we believe are reasonable under the circumstances. Actual results could differ materially from those estimates.

Significant estimates relate primarily to determining the fair value of stock-based awards, the fair value of assets and liabilities assumed in business combinations, and the incremental borrowing rate used to determine operating lease right-of-use assets and lease liabilities. On an ongoing basis, management evaluates our estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities.

Functional Currency

Generally, the U.S. dollar is the functional currency for our subsidiaries, and therefore, foreign currency denominated monetary assets and liabilities are remeasured into U.S. dollars at exchange rates at the balance sheet date and foreign currency denominated non-monetary assets and liabilities are remeasured into U.S. dollars at historical exchange rates. Gains or losses from foreign currency remeasurement and settlements are included in other income (expense), net in the consolidated statements of operations. For those foreign subsidiaries where the local currency is the functional currency, we translate the financial statements to U.S. dollars at exchange rates at the balance sheet date for assets and liabilities and at monthly average exchange rates for revenues and expenses. Translation gains and losses are recorded in accumulated other comprehensive income (loss) as a component of stockholders’ equity (deficit). Net foreign exchange gains and losses were not material for the three months ended March 31, 2025 and 2024.

Concentration of Credit Risk

Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash and cash equivalents, restricted cash, marketable securities, and accounts receivable. We maintain cash and cash equivalents with several financial institutions. We believe that the financial institutions that hold our cash and cash equivalents are financially sound and, accordingly, minimal credit risks exist with respect to these balances. We maintain investments in U.S. and non-U.S. government securities, investment-grade corporate and government agency securities, certificates of deposit, commercial paper, and money market accounts that carry high credit ratings and accordingly, minimal credit risk exists with respect to these balances.

Recently Adopted Accounting Pronouncements / Accounting Pronouncements Not Yet Adopted

In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires an entity to disclose specific categories in the effective tax rate reconciliation as well as provide additional information for reconciling items that meet a quantitative threshold. This standard also requires certain disaggregated disclosures related to income from continuing operations, income tax expense, and income taxes paid. We adopted this standard effective January 1, 2025. Adoption of this standard will result in additional disclosures in our annual consolidated financial statements, but did not impact these unaudited interim consolidated financial statements.

Accounting Pronouncements Not Yet Adopted

In November 2024, the FASB issued ASU No. 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, which requires an entity to disclose disaggregated information about certain income statement expense line items. The standard is effective for us beginning January 1, 2027, with early adoption permitted. We are currently evaluating the impact the adoption will have on our disclosures.

Net Income (Loss) per Share

We compute net income (loss) per share of Class A and Class B common stock using the two-class method required for multiple classes of common stock and participating securities. Prior to our initial public offering (“IPO”) in March 2024, our participating securities included Series A, Series A-1, Series B, Series C, Series D, Series D-1, Series E, Series F, and Series F-1 convertible preferred stock, as the holders of these series of preferred stock were entitled to receive noncumulative dividends subject to certain requirements at an annual rate of 8% of the respective original issue price then in effect in the event that a dividend was paid on common stock.

In connection with our IPO, our Series A, Series A-1, Series B, Series C, Series D, Series D-1, Series E, and Series F preferred stock converted on a one-to-one basis into 67,917,432 shares of Class B common stock, and our Series F-1 preferred stock converted on a one-to-one basis into 5,104,017 shares of Class A common stock. These shares are weighted in the denominator of net income (loss) per share for Class A and Class B common stock for the portion of the time outstanding subsequent to our IPO.

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset in an orderly transaction between market participants at the measurement date. To increase the comparability of fair value measures, the following hierarchy prioritizes the inputs to valuation methodologies used to measure fair value:

•Level 1: Quoted market prices in active markets for identical assets or liabilities

•Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data

•Level 3: Unobservable inputs reflecting the reporting entity’s own assumptions or external inputs from inactive markets

We classify our cash equivalents and marketable securities within Level 1 or Level 2 because we use quoted market prices or alternative pricing sources and models utilizing market observable inputs to determine their fair value. There were no transfers between levels during the periods presented.