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, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Numerator:
Net loss attributable to Class A and Class B common stockholders	$ (69,184)	$ (89,538)	$ (139,289)	$ (196,407)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	312,615,531	293,170,401	310,358,089	290,775,910
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	312,615,531	293,170,401	310,358,089	290,775,910
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.22)	$ (0.31)	$ (0.45)	$ (0.68)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.22)	$ (0.31)	$ (0.45)	$ (0.68)