NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Numerator:
Net loss attributable to Class A and Class B common stockholders	$ (60,291)	$ (78,364)	$ (340,503)	$ (217,653)
Denominator:
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, basic (in shares)	332,732,831	316,987,303	328,516,203	312,583,956
Weighted-average shares used in computing net loss per share attributable to Class A and Class B common stockholders, diluted (in shares)	332,732,831	316,987,303	328,516,203	312,583,956
Net loss per share attributable to Class A and Class B common stockholders, basic (in USD per share)	$ (0.18)	$ (0.25)	$ (1.04)	$ (0.70)
Net loss per share attributable to Class A and Class B common stockholders, diluted (in USD per share)	$ (0.18)	$ (0.25)	$ (1.04)	$ (0.70)