Summary of Significant Accounting Policies - Additional Information (Details)		1 Months Ended	12 Months Ended
	Nov. 01, 2020	Dec. 31, 2021 USD ($) $ / shares shares	Jan. 31, 2022 USD ($) Segment Customer shares	Jan. 31, 2021 USD ($) Customer	Jan. 31, 2020 USD ($) Customer
Summary Of Significant Accounting Policies [Line Items]
Proceeds from initial public offering, net of underwriting discounts and commissions		$ 1,247,000,000	$ 1,252,974,000
Conversion of redeemable convertible preferred stock to common stock upon initial public offering		349,100,000
Stock split ratio description			2-for-1 stock split
Stock split conversion ratio	2
Restricted cash			$ 1,800,000	$ 1,800,000	$ 1,800,000
Number of customers individually exceeded 10% of revenue | Customer			0	0	0
Number of customers represented 10% or more accounts receivable, net | Customer			0	0
Property and equipment depreciation method			straight-line
Contract assets			$ 2,900,000	$ 1,300,000
Sales commissions amortization period			5 years
Option to extend description			The lease term includes options to extend or terminate the lease when it is reasonably certain they will be exercised.
Option to extend			true
Option to terminate description			The lease term includes options to extend or terminate the lease when it is reasonably certain they will be exercised.
Option to terminate			true
Deferred offering costs		6,000,000.0
Software capitalized cost			$ 9,900,000	2,900,000	$ 0
Amortization of capitalized costs			1,400,000	1,400,000	0
Advertising costs			6,300,000	2,200,000	2,600,000
Impairment charge			$ 0	$ 0	$ 0
Number of operating segments | Segment			1
Number of reportable segments | Segment			1
Employer contributions under 401(k) plan			$ 0
RSUs
Summary Of Significant Accounting Policies [Line Items]
Cumulative stock-based compensation expense			$ 190,500,000
ASU 2019-12
Summary Of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adoption date			Feb. 01, 2021
Change in accounting principle, accounting standards update, adopted [true false]			true
Change in accounting principle, accounting standards update, immaterial effect [true false]			true
IPO
Summary Of Significant Accounting Policies [Line Items]
Shares issued underwriters' overallotment option | shares			1,230,000
Commission and discounts		69,400,000
Offering expenses		$ 6,000,000.0
IPO | Common Class A
Summary Of Significant Accounting Policies [Line Items]
Number of stock issued during the period | shares		16,530,000
Shares issued, price per share | $ / shares		$ 80.00
IPO | Redeemable Convertible Preferred Stock
Summary Of Significant Accounting Policies [Line Items]
Conversion of convertible stock to common stock (shares) common stock upon initial public offering (shares) | shares		94,127,984
Minimum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful lives			3 years
Subscription revenue from contracts generate period			1 year
Contract with customer, customer payments term			30 days
Maximum
Summary Of Significant Accounting Policies [Line Items]
Property and equipment estimated useful lives			5 years
Subscription revenue from contracts generate period			3 years
Contract with customer, customer payments term			60 days