Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (22,555)	$ (28,736)
Denominator:
Weighted-average shares used in computing net loss per share, basic (in shares)	548,451	569,925
Net loss per share, basic (in dollars per share)	$ (0.04)	$ (0.05)
Numerator:
Net loss	$ (22,555)	$ (28,736)
Denominator:
Weighted-average shares used in computing net loss per share, diluted (in shares)	548,451	569,925
Net loss per share, diluted (in dollars per share)	$ (0.04)	$ (0.05)
Class A
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (19,277)	$ (24,579)
Denominator:
Weighted-average shares used in computing net loss per share, basic (in shares)	468,751	487,472
Net loss per share, basic (in dollars per share)	$ (0.04)	$ (0.05)
Numerator:
Net loss	$ (19,277)	$ (24,579)
Denominator:
Weighted-average shares used in computing net loss per share, diluted (in shares)	468,751	487,472
Net loss per share, diluted (in dollars per share)	$ (0.04)	$ (0.05)
Class B
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (3,278)	$ (4,157)
Denominator:
Weighted-average shares used in computing net loss per share, basic (in shares)	79,700	82,453
Net loss per share, basic (in dollars per share)	$ (0.04)	$ (0.05)
Numerator:
Net loss	$ (3,278)	$ (4,157)
Denominator:
Weighted-average shares used in computing net loss per share, diluted (in shares)	79,700	82,453
Net loss per share, diluted (in dollars per share)	$ (0.04)	$ (0.05)