v3.22.0.1
REVENUE (Tables)
12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Schedule of Revenue Sources and Streams
Information regarding source of revenues:
20212020
Over time$180,698 $117,501 
Point in time70,074 44,195 
Total revenue$250,772 $161,696 
Information regarding revenue by stream:
20212020
Revenues:
Subscription$180,698 $117,501 
Advertising38,501 27,043 
Duolingo English Test24,658 15,155 
Other (1)6,915 1,997 
Total revenues$250,772 $161,696 
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(1) Other revenue is mainly comprised of in-app purchases of virtual goods.
Schedule of Deferred Revenues Changes in deferred revenues were as follows:
20212020
Beginning balance—January 1$54,792 $26,307 
Amount from beginning balance recognized into revenue(54,792)(26,307)
Recognition of deferred revenue(139,371)(91,193)
Deferral of revenue237,638 145,985 
Ending balance—December 31$98,267 $54,792 
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:
20212020
United States$109,163 $70,978 
United Kingdom25,163 15,245 
Rest of World116,446 75,473 
Total$250,772 $161,696