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REVENUE
 3 Months Ended
Mar. 31, 2025
Revenue from Contract with Customer [Abstract]  
REVENUE REVENUE
Disaggregation of Revenue
In accordance with ASC 606, Revenue from Contracts with Customers, the Company disaggregates revenue from contracts with customers into revenue streams, which most closely depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors.
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 
________________
(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 

Three service providers, Apple, Google and Stripe, processed 61.3%, 23.3%, and 11.0% of total revenues for the three months ended March 31, 2025, respectively. Three services providers, Apple, Google, and Stripe processed 59.3%, 23.7% and 12.9% of total revenues for the three months ended March 31, 2024, respectively.
Deferred revenue mostly consists of payments received in advance of revenue recognition, and is mostly related to time-based subscriptions, which will be recognized into revenue over the course of the upcoming year (recognized over 12 months or less). Additionally, the Duolingo English Test has deferred revenue related to tests that have been purchased, but will not be recognized until the tests have been proctored. 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