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REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Schedule of Revenue Sources and Streams |
|  |  | Year Ended December 31,
(In thousands) |  |  |  |  | 2023 |  | 2022 |  | 2021
Revenues: |  |  |  |  |  |  |  |  |
Subscription |  |  |  |  | $ | 404,684 |  |  | $ | 273,507 |  |  | $ | 180,698 |
Advertising |  |  |  |  | 49,858 |  |  | 44,731 |  |  | 38,501 |
Duolingo English Test |  |  |  |  | 41,212 |  |  | 32,718 |  |  | 24,658 |
In-App Purchases |  |  |  |  | 34,673 |  |  | 17,914 |  |  | 6,836 |
Other (1) |  |  |  |  | 682 |  |  | 625 |  |  | 79 |
Total revenues |  |  |  |  | $ | 531,109 |  |  | $ | 369,495 |  |  | $ | 250,772 |
________________ (1) Other revenue is mainly comprised of revenue from Duo’s Taquería.
Schedule of Revenue by Geographic Areas | Information regarding geography of revenues is based upon the location where the users are located or, in the case of the Duolingo English Test, where the tests are taken:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
United States | $ | 238,759 |  |  | $ | 168,320 |  |  | $ | 109,163 |
United Kingdom | 42,118 |  |  | 31,539 |  |  | 25,163 |
Rest of World | 250,232 |  |  | 169,636 |  |  | 116,446 |
Total | $ | 531,109 |  |  | $ | 369,495 |  |  | $ | 250,772 |
Schedule of Deferred Revenues | Changes in deferred revenues were as follows:
| Year Ended December 31,
(In thousands) | 2023 |  | 2022
Beginning balance—January 1 | $ | 157,550 |  |  | $ | 98,267 |
Amount from beginning balance recognized into revenue | (157,550) |  |  | (98,267) |
Recognition of deferred revenue | (287,429) |  |  | (199,130) |
Deferral of revenue | 536,621 |  |  | 356,680 |
Ending balance—December 31 | $ | 249,192 |  |  | $ | 157,550 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph a -SubTopic 10 -Topic 280 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 + Details
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