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REVENUE (Tables)
12 Months Ended
Dec. 31, 2023
Revenue from Contract with Customer [Abstract]  
Schedule of Revenue Sources and Streams
Year Ended December 31,
(In thousands)202320222021
Revenues:
Subscription$404,684 $273,507 $180,698 
Advertising49,858 44,731 38,501 
Duolingo English Test41,212 32,718 24,658 
In-App Purchases34,673 17,914 6,836 
Other (1)682 625 79 
Total revenues$531,109 $369,495 $250,772 
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(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,
202320222021
United States$238,759 $168,320 $109,163 
United Kingdom42,118 31,539 25,163 
Rest of World250,232 169,636 116,446 
Total$531,109 $369,495 $250,772 
Schedule of Deferred Revenues
Changes in deferred revenues were as follows:
Year Ended December 31,
(In thousands)20232022
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 revenue536,621 356,680 
Ending balance—December 31$249,192 $157,550