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EARNINGS (LOSS) PER SHARE (Tables)
12 Months Ended
Dec. 31, 2024
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted As the liquidation and dividend rights are identical for Class A and Class B common stock, the undistributed earnings are allocated on a proportional basis and the resulting net income per share attributable to common stockholders will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis.
Year Ended December 31,
(In thousands, except per share data)202420232022
Numerator:
Net income (loss) attributable to Class A and Class B common stockholders$88,574 $16,067 (59,574)
Denominator:
Weighted-average shares in computing net income (loss) per share attributable to Class A and Class B common stockholders, basic and diluted43,504 41,451 39,470 
Effect of dilutive securities
Founder awards where performance has been met360 270 — 
Dilutive effect of stock options outstanding (1)1,435 2,774 — 
RSUs outstanding1,802 2,027 — 
Denominator for dilutive net income per common share - weighted-average shares47,101 46,522 39,470 
Basic income (loss) per common share$2.04 $0.39 $(1.51)
Diluted income (loss) per common share$1.88 $0.35 $(1.51)
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(1) The Company had 1.5 million options outstanding as of December 31, 2024. The estimated dilutive effect is calculated as the number of shares expected to be issued upon vesting or exercise, adjusted for the strike price proceeds that are received by the Company and assumed to be used to repurchase shares of Duolingo common stock.
Schedule of Antidilutive Securities Excluded from Computation of Net Loss Per Share The potential shares of common stock that were excluded from the computation of diluted net loss per share attributable to common stockholders for the period presented because including them would have been antidilutive are as follows:
Year Ended December 31,
(In thousands)2022
Stock options outstanding180 
RSUs outstanding4,410 
Founder awards where performance has been met2,036 
Total6,626