v3.26.1
Stock-based compensation (Tables)
 6 Months Ended
Jun. 30, 2026
Share-Based Payment Arrangement [Abstract]  
Schedule of Black-Scholes Option-Pricing Model
The following table presents, on a weighted average basis, the assumptions used in the Black-Scholes option-pricing model to determine the grant-date fair value of stock options granted:
Three Months Ended June 30,Six Months Ended June 30,
2026202520262025
Risk-free interest rate 4.3 %4.2 %3.9 %4.3 %
Expected term (in years)5.55.96.06.0
Expected volatility40.5 %53.2 %42.6 %51.7 %
Expected dividend yield0 %0 %0 %0 %
Schedule of Stock Option Activity
The following table summarizes the Company’s stock option activity since December 31, 2025:
Number of
shares		Weighted
average
exercise price		Weighted
average
remaining
contractual term		Aggregate
intrinsic value
(in years)(in thousands)
Outstanding as of December 31, 20256,539,263$2.43 6.00$8,653 
Granted 1,446,5003.91 
Exercised(158,736)1.16 $231 
Expired(11,400)1.17 
Forfeited(291,039)3.16 
Outstanding as of June 30, 20267,524,588$2.72 5.76$2,951 
Options vested and expected to vest as of
June 30, 2026		7,524,588$2.73 5.76$2,951 
Options exercisable as of June 30, 20265,317,431$2.49 4.45$2,709 
Schedule of Restricted Stock Units Activity
The following table summarizes the Company’s restricted stock units activity since December 31, 2025:
Number of
shares		Weighted
average grant date fair value
Unvested as of December 31, 20252,795,976$2.39 
Granted2,199,8252.99 
Vested(1,004,341)2.31 
Forfeited(362,796)2.74 
Unvested as of June 30, 20263,628,664$2.75 
Schedule of ESPP Black-Scholes Option-Pricing Model The following weighted average assumptions were used in the calculation of fair value of shares under the 2021 ESPP at the grant date for both the six months ended June 30, 2026 and 2025:
Six Months Ended June 30,
20262025
Risk-free interest rate3.7 %4.3 %
Expected term (in years)0.50.5
Expected volatility41.5 %51.5 %
Expected dividend yield0 %0 %
Schedule of Stock-Based Compensation Expense
Stock-based compensation expense was classified in the condensed consolidated statements of operations as follows (in thousands):
Three Months Ended June 30,Six Months Ended June 30,
2026202520262025
Cost of revenue$145 $120 $234 $213 
Research and development106 50 171 190 
Sales and marketing147 111 236 200 
General and administrative923 937 1,903 1,657 
Total stock-based compensation expense$1,321 $1,218 $2,544 $2,260