Net Loss Per Share Attributable To Common Stockholders - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
Numerator:
Net loss	$ (89,538)	$ (96,306)	$ (196,407)	$ (186,140)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	293,170,401	277,417,227	290,775,910	273,424,105
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	293,170,401	277,417,227	290,775,910	273,424,105
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.31)	$ (0.35)	$ (0.68)	$ (0.68)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.31)	$ (0.35)	$ (0.68)	$ (0.68)