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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense
A summary of stock-based compensation expense recognized in the consolidated statements of operations and comprehensive loss is as follows (in thousands):
Years Ended December 31,
202420232022
Cost of revenue$845 $24 $10 
Research and development76,427 7,360 11,223 
Sales and marketing95,887 2,067 10,148 
General and administrative61,429 1,228 8,854 
 Total$234,588 $10,679 $30,235 
Schedule of Estimated Grant Date Fair Values
The estimated grant date fair values of the employee stock options granted during the years ended December 31, 2024, 2023, and 2022 were calculated using the Black-Scholes-Merton Option-pricing model, based on the following minimum and maximum assumptions:
Years Ended December 31,
202420232022
Expected dividend yield0.0 %0.0 %0.0 %
Risk-free interest rate
4.2%
3.9% - 4.7%
1.7% - 2.5%
Expected volatility
52.3%
48.8% - 49.1%
47.5% - 47.8%
Expected term (in years)
6.1
6.1
6.1
Schedule of Stock Option Activity
A summary of stock option activity under the 2018 Plan and 2024 Plan is as follows (in thousands, except years and per share data):
Number of
Shares		Weighted-Average
Exercise Price
(per share)		Weighted-Average
Remaining Contractual Term
(in years)		Aggregate
Intrinsic
Value
Outstanding at December 31, 202310,059$0.84 7.5$175,790 
Granted70.01 
Exercised(4,682)0.87 
Cancelled and forfeited(99)0.72 
Outstanding at December 31, 20245,285$0.83 6.5$695,689 
Vested and expected to vest at December 31, 2024
5,285$0.83 6.5$695,689 
Exercisable at December 31, 20243,868$0.65 6.3$509,743 
Schedule of Estimated Grant Date Fair Values of ESPP Granted
The estimated grant date fair values of the ESPP granted during the year ended December 31, 2024 was calculated using the Black-Scholes-Merton Option-pricing model, based on the following minimum and maximum assumptions:
Year Ended December 31, 2024
Expected dividend yield0.0 %
Risk-free interest rate
4.4% - 5.2%
Expected volatility
46.6% - 70.8%
Expected term (in years)
0.5 - 0.7
Schedule of Restricted Stock Unit Activity
A summary of RSU activity under the 2018 Plan and 2024 Plan is as follows (in thousands, except per share data):
Number of
Restricted Stock
Units		Weighted-Average
Grant Date Fair
Value (per share)
Outstanding at December 31, 20238,583 $13.34 
Granted10,674 39.76 
Vested(5,102)13.40 
Cancelled and forfeited(535)26.57 
Outstanding at December 31, 202413,620 $33.49