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REVENUE (Tables)
 3 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
Schedule of Disaggregation of Revenue
Three Months Ended March 31,
(In thousands)20252024
Revenues:
Subscription$190,987 $131,688 
Other (1)39,756 35,865 
Total revenues$230,743 $167,553 
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(1) Other revenue is comprised of the below.
Three Months Ended March 31,
(In thousands)20252024
Advertising$17,882 $12,952 
Duolingo English Test11,986 12,755 
In-App Purchases9,442 9,924 
Other446 234 
Total other revenue$39,756 $35,865 
Schedule of Deferred Revenues Changes in deferred revenues were as follows:
Three Months Ended March 31,
(In thousands)20252024
Beginning balance—January 1$372,884 $249,192 
Amount from beginning balance recognized into revenue(150,183)(102,257)
Recognition of deferred revenue(59,691)(40,907)
Deferral of revenue252,013 173,285 
Ending balance—March 31$415,023 $279,313