Net Loss Per Share Attributable to Common Stockholders - Schedule of Anti-Dilutive Common Stock Equivalents Excluded from Computation of Diluted Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Class A Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	46,301	38,481	44,575	137,516
Class A Common Stock | Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	90,936
Class A Common Stock | Unvested RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	31,022	19,491	29,307	24,917
Class A Common Stock | Outstanding stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	13,812	17,308	13,913	19,664
Class A Common Stock | Shares subject to repurchase from RSAs and early exercised stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	104	1,260	355	1,729
Class A Common Stock | Shares issuable under ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	936	422	851	270
Class A Common Stock | Returnable shares issued in connection with business acquisition
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	427	0	149	0
Class B Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	0
Class B Common Stock | Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	0
Class B Common Stock | Unvested RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	0
Class B Common Stock | Outstanding stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	0
Class B Common Stock | Shares subject to repurchase from RSAs and early exercised stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	0
Class B Common Stock | Shares issuable under ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	0
Class B Common Stock | Returnable shares issued in connection with business acquisition
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive common stock equivalents	0	0	0	0