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, 2024	Apr. 30, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (28,736)	$ (31,901)
Denominator:
Weighted-average shares used in computing net loss per share, basic (in shares)	569,925	557,878
Net loss per share, basic (in dollars per share)	$ (0.05)	$ (0.06)
Denominator:
Weighted-average shares used in computing net loss per share, diluted (in shares)	569,925	557,878
Net loss per share, diluted (in dollars per share)	$ (0.05)	$ (0.06)
Class A
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (24,579)	$ (27,186)
Denominator:
Weighted-average shares used in computing net loss per share, basic (in shares)	487,472	475,425
Net loss per share, basic (in dollars per share)	$ (0.05)	$ (0.06)
Denominator:
Weighted-average shares used in computing net loss per share, diluted (in shares)	487,472	475,425
Net loss per share, diluted (in dollars per share)	$ (0.05)	$ (0.06)
Class B
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (4,157)	$ (4,715)
Denominator:
Weighted-average shares used in computing net loss per share, basic (in shares)	82,453	82,453
Net loss per share, basic (in dollars per share)	$ (0.05)	$ (0.06)
Denominator:
Weighted-average shares used in computing net loss per share, diluted (in shares)	82,453	82,453
Net loss per share, diluted (in dollars per share)	$ (0.05)	$ (0.06)