Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2024
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 notes included in our final prospectus, dated March 20, 2024, filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on March 21, 2024 (the “Prospectus”) in connection with our initial public offering (“IPO”). 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 notes included in our final prospectus, dated March 20, 2024, filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on March 21, 2024 (the “Prospectus”) in connection with our initial public offering (“IPO”). 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. Net foreign exchange gains and losses were not material for the three and six months ended June 30, 2024 and 2023. On January 1, 2024, we changed the functional currency of our U.K. subsidiary, Reddit UK Limited, from the U.S. dollar to the British pound. The change in functional currency is due primarily to the increased exposure to the British pound as our future operating cash flows for our U.K. subsidiary are expected to be in British pounds. We translate the financial statements of the U.K. subsidiary 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). The change in the functional currency of Reddit UK Limited was accounted for prospectively from January 1, 2024 and did not have a material impact on our consolidated financial statements.
Deferred Offering Costs	Prior to our IPO, deferred offering costs, which consist of direct incremental legal, accounting, consulting, and other fees related to the IPO, were capitalized in other noncurrent assets on the consolidated balance sheets. After the IPO, the deferred offering costs were reclassified into additional paid-in capital as an offset against IPO proceeds.
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.
Accounting Pronouncements Not Yet Adopted	In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires disclosure of incremental segment information on an annual and interim basis. All disclosure requirements of this standard are required for entities with a single reportable segment. This standard is effective for us in the annual period beginning January 1, 2024 and interim periods beginning January 1, 2025, with early adoption permitted. We are currently evaluating the impact the adoption will have on our consolidated financial statements. In December 2023, the FASB issued ASU No. 2023-08, Intangibles—Goodwill and Other—Crypto Assets (Subtopic 250-60): Accounting for and Disclosure of Crypto Assets, which requires an entity to measure crypto assets at fair value at each reporting period with changes recognized in net income. This standard also requires additional disclosures about the types of crypto assets held by entities and the changes in those holdings. The standard is effective for us beginning January 1, 2025, with early adoption permitted. We are currently evaluating the impact the adoption will have on our consolidated financial statements. In December 2023, the FASB issued 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. The standard is effective for us beginning January 1, 2025, with early adoption permitted. We are currently evaluating the impact the adoption will have on our consolidated financial statements.
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 the IPO, 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. The holders of 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 did not have a contractual obligation to share in our losses. As such, our net losses for the three and six months ended June 30, 2023 were not allocated to these participating securities.
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)

6 Months Ended

Jun. 30, 2024

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 notes included in our final prospectus, dated March 20, 2024, filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on March 21, 2024 (the “Prospectus”) in connection with our initial public offering (“IPO”). 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. Net foreign exchange gains and losses were not material for the three and six months ended June 30, 2024 and 2023.

On January 1, 2024, we changed the functional currency of our U.K. subsidiary, Reddit UK Limited, from the U.S. dollar to the British pound. The change in functional currency is due primarily to the increased exposure to the British pound as our future operating cash flows for our U.K. subsidiary are expected to be in British pounds. We translate the financial statements of the U.K. subsidiary 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). The change in the functional currency of Reddit UK Limited was accounted for prospectively from January 1, 2024 and did not have a material impact on our consolidated financial statements.

Deferred Offering Costs

Prior to our IPO, deferred offering costs, which consist of direct incremental legal, accounting, consulting, and other fees related to the IPO, were capitalized in other noncurrent assets on the consolidated balance sheets. After the IPO, the deferred offering costs were reclassified into additional paid-in capital as an offset against IPO proceeds.

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.

Accounting Pronouncements Not Yet Adopted

In November 2023, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update (“ASU”) No. 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures, which requires disclosure of incremental segment information on an annual and interim basis. All disclosure requirements of this standard are required for entities with a single reportable segment. This standard is effective for us in the annual period beginning January 1, 2024 and interim periods beginning January 1, 2025, with early adoption permitted. We are currently evaluating the impact the adoption will have on our consolidated financial statements.

In December 2023, the FASB issued ASU No. 2023-08, Intangibles—Goodwill and Other—Crypto Assets (Subtopic 250-60): Accounting for and Disclosure of Crypto Assets, which requires an entity to measure crypto assets at fair value at each reporting period with changes recognized in net income. This standard also requires additional disclosures about the types of crypto assets held by entities and the changes in those holdings. The standard is effective for us beginning January 1, 2025, with early adoption permitted. We are currently evaluating the impact the adoption will have on our consolidated financial statements.

In December 2023, the FASB issued 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. The standard is effective for us beginning January 1, 2025, with early adoption permitted. We are currently evaluating the impact the adoption will have on our consolidated financial statements.

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 the IPO, 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.

The holders of 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 did not have a contractual obligation to share in our losses. As such, our net losses for the three and six months ended June 30, 2023 were not allocated to these participating securities.

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.