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Equity (Tables)
 12 Months Ended
Jan. 31, 2022
Share-based Payment Arrangement [Abstract]  
Schedule of Shares Reserved For Future Issuance
The Company had reserved shares of common stock for future issuance as follows:

January 31, 2022January 31, 2021
2012 Equity Incentive Plan:
Options outstanding42,043,097 64,574,656 
Restricted stock units outstanding4,530,324 7,520,474 
2020 Equity Incentive Plan:
Shares available for future grants45,446,313 32,871,367 
Restricted stock units outstanding5,081,999 1,828,083 
2020 Employee Stock Purchase Plan:
Shares available for future grants8,208,724 5,700,000 
Total shares of common stock reserved for future issuance105,310,457 112,494,580 
Option Activity Rollforward
Stock option activity and activity regarding shares available for grant under the Plans during the fiscal years ended January 31, 2022, 2021, and 2020 is as follows:
Shares
Available for Grant		Number of Options OutstandingWeighted-
Average
Exercise Price		Weighted-Average Remaining Contractual Life
(in years)		Aggregate
Intrinsic
Value
(in thousands)
Balance—January 31, 2019
5,479,974 51,535,443 $2.63 8.8$287,993 
Shares authorized33,799,630 — 
Options granted(46,934,532)46,934,532 $9.21 
Options exercised— (9,735,006)$3.47 
Options forfeited7,831,769 (7,831,769)$4.07 
Repurchases of unvested common stock252,260 — 
Restricted stock awards granted(16,700)— 
Balance—January 31, 2020
412,401 80,903,200 $6.21 8.6$1,546,313 
Shares authorized54,970,187—
Shares ceased to be available for issuance under the 2012 Plan(15,696,031)—
Options granted(876,961)876,961$34.83 
Options exercised—(13,798,741)$3.90 
Options forfeited3,406,764(3,406,764)$7.04 
Repurchase of unvested common stock40,000—
RSUs granted(9,552,687)—
RSUs forfeited167,694—
Balance—January 31, 2021
32,871,36764,574,656$7.04 7.7$17,138,896 
Shares authorized14,395,880—
Options exercised—(20,902,509)$6.08 
Options forfeited1,629,050(1,629,050)$6.80 
RSUs granted(4,025,850)—
RSUs forfeited575,866—
Balance—January 31, 2022
45,446,31342,043,097$7.53 6.9$11,283,299 
Vested and exercisable as of January 31, 2022
22,862,872$6.44 6.5$6,160,733 
Option Rollforward Schedule
Stock option activity and activity regarding shares available for grant under the Plans during the fiscal years ended January 31, 2022, 2021, and 2020 is as follows:
Shares
Available for Grant		Number of Options OutstandingWeighted-
Average
Exercise Price		Weighted-Average Remaining Contractual Life
(in years)		Aggregate
Intrinsic
Value
(in thousands)
Balance—January 31, 2019
5,479,974 51,535,443 $2.63 8.8$287,993 
Shares authorized33,799,630 — 
Options granted(46,934,532)46,934,532 $9.21 
Options exercised— (9,735,006)$3.47 
Options forfeited7,831,769 (7,831,769)$4.07 
Repurchases of unvested common stock252,260 — 
Restricted stock awards granted(16,700)— 
Balance—January 31, 2020
412,401 80,903,200 $6.21 8.6$1,546,313 
Shares authorized54,970,187—
Shares ceased to be available for issuance under the 2012 Plan(15,696,031)—
Options granted(876,961)876,961$34.83 
Options exercised—(13,798,741)$3.90 
Options forfeited3,406,764(3,406,764)$7.04 
Repurchase of unvested common stock40,000—
RSUs granted(9,552,687)—
RSUs forfeited167,694—
Balance—January 31, 2021
32,871,36764,574,656$7.04 7.7$17,138,896 
Shares authorized14,395,880—
Options exercised—(20,902,509)$6.08 
Options forfeited1,629,050(1,629,050)$6.80 
RSUs granted(4,025,850)—
RSUs forfeited575,866—
Balance—January 31, 2022
45,446,31342,043,097$7.53 6.9$11,283,299 
Vested and exercisable as of January 31, 2022
22,862,872$6.44 6.5$6,160,733 
Schedule of Unvested RSA Rollforward Restricted stock award activity during the fiscal years ended January 31, 2022, 2021, and 2020 is as follows:
Under the PlansOut of the Plans
Number of SharesWeighted-Average Grant Date
Fair Value
per Share		Number of SharesWeighted-Average Grant Date
Fair Value
per Share
Unvested Balance—January 31, 2019
920,380 $7.24 1,652,446 $1.49 
Granted16,700 $8.58 661,635 $1.61 
Vested(920,380)$7.24 (442,222)$0.50 
Repurchased— $— (268,297)$— 
Unvested Balance—January 31, 2020
16,700 $8.58 1,603,562 $2.06 
Vested(16,700)$8.58 (861,651)$2.03 
Unvested Balance—January 31, 2021
— $— 741,911 $2.11 
Vested— $— (361,651)$2.10 
Unvested Balance—January 31, 2022
— $— 380,260 $2.11 
Schedule of Unvested RSU Rollforward
RSU activity during the fiscal years ended January 31, 2022 and 2021 was as follows:

Number of SharesWeighted-Average Grant Date
Fair Value
per Share
Unvested Balance—January 31, 2020
— $— 
Granted9,552,687 $123.71 
Vested(36,436)$50.71 
Forfeited(167,694)$64.13 
Unvested Balance—January 31, 2021
9,348,557 $125.06 
Granted4,025,850 $250.46 
Vested(3,186,218)$109.44 
Forfeited(575,866)$169.74 
Unvested Balance—January 31, 2022
9,612,323 $180.08 
Valuation Assumptions Schedule The following table summarizes the weighted-average assumptions used in estimating the fair value of stock options granted to employees and non-employees during the fiscal years ended January 31, 2021 and 2020:
Fiscal Year Ended January 31,
20212020
Expected term (in years)6.06.0
Expected volatility37.2 %36.9 %
Risk-free interest rate1.0 %2.0 %
Expected dividend yield— %— %
Valuation Assumptions Other Than Stock Options Schedule
The following table summarizes the assumptions used in estimating the fair value of employee stock purchase rights granted under the 2020 ESPP during the fiscal years ended January 31, 2022 and 2021:

Fiscal Year Ended January 31,
20222021
Expected term (in years)0.50.5
Expected volatility
37.3% - 49.5%
60.1 %
Risk-free interest rate0.1 %0.1 %
Expected dividend yield— %— %
Share-based Compensation Schedule
Stock-based compensation included in the consolidated statements of operations was as follows (in thousands):
Fiscal Year Ended January 31,
202220212020
Cost of revenue$87,336 $33,642 $3,650 
Sales and marketing185,970 97,879 20,757 
Research and development232,867 99,223 15,743 
General and administrative98,922 70,697 38,249 
Stock-based compensation, net of amounts capitalized605,095 301,441 78,399 
Capitalized stock-based compensation24,174 2,072 1,080 
Total stock-based compensation$629,269 $303,513 $79,479