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Stockholders’ Equity (Tables)
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Shares and Warrants Reserved for Issuance
In December 2020, the Company's amended and restated certificate of incorporation became effective, which authorizes the issuance of 700,000,000 shares of common stock with a par value of $0.0001 per share. Shares of common stock reserved for issuance, on an as-converted basis, are as follows:
December 31,June 30,
20232024
Options issued and outstanding12,617,254 13,229,971 
Restricted stock units outstanding5,534,394 5,141,818 
Shares available for future issuance under 2020 plan6,420,703 7,961,242 
Shares available for issuance under employee stock purchase plan2,896,226 3,561,383 
Total27,468,577 29,894,414 
Schedule of Stock Option Activity
The following table summarizes stock option activity for the six months ended June 30, 2024:
Number of OptionsWeighted-Average Exercise Price Per ShareWeighted-Average Remaining Contractual Life (years)Aggregate
Intrinsic
Value
Balances at December 31, 202312,617,254 $14.57 6.1$375,897 
Options granted1,267,617 25.76 
Options exercised(621,102)3.56 
Options cancelled and forfeited(33,798)16.43 
Balances at June 30, 202413,229,971 16.15 6.1156,871 
Options exercisable – June 30, 20249,126,356 12.28 4.9139,527 
Options vested and expected to vest – June 30, 202413,205,397 $16.12 6.1$156,855 
Schedule of Restricted Stock Units and Restricted Stock The following table summarizes RSU activity for the six months ended June 30, 2024:
Number of SharesWeighted-Average Grant Date Fair Value Per Share
Unvested at December 31, 20235,534,394$34.90 
RSUs granted2,051,99925.67 
RSUs vested(1,934,708)32.45 
RSUs cancelled and forfeited(509,867)34.75 
Unvested at June 30, 20245,141,818$32.15 
Schedule of Stock Options Fair Value Assumptions
The following assumptions were used to estimate the fair value of options granted:

Three Months Ended June 30,Six Months Ended June 30,
2023202420232024
Expected term (in years)
5.2 – 5.3
*
5.2 – 7.0
5.3 – 7.0
Expected volatility
53.13% – 53.26%
*
50.96% – 53.26%
50.32% – 53.38%
Risk-free interest rate
3.74%
*
3.45% – 3.74%
4.21% – 4.27%
Dividend yield—%*—%—%

*No options were granted during the three months ended June 30, 2024.
Schedule of Employee Stock Purchase Plan Fair Value Assumptions
The following assumptions were used to estimate the fair value of ESPP purchase rights:
Three Months Ended June 30,Six Months Ended June 30,
2023202420232024
Expected term (in years)**0.50.5
Expected volatility**97.74%96.69%
Risk-free interest rate**4.97%5.30%
Dividend yield**—%—%
_________
*No ESPP purchase rights were granted during the three months ended June 30, 2023 and 2024.
Schedule of Stock-based Compensation Expense
The Company recorded stock-based compensation in the following expense categories in its condensed consolidated statements of operations and comprehensive loss for employees and nonemployees:
Three Months Ended June 30,Six Months Ended June 30,
2023202420232024
Sales and marketing$(1,505)$3,078 $1,867 $6,056 
Customer operations3,093 2,120 5,976 4,083 
Engineering and product development18,708 17,917 75,367 37,127 
General, administrative, and other12,300 11,094 23,495 22,720 
Total$32,596 $34,209 $106,705 $69,986