Stockholders' Equity - Summary of Stock Based Compensation from Stock Options, RSUs and ESPP (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Oct. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total amount charged to loss from operations		$ 65,500	$ 119,442		$ 130,647	$ 192,061
Property and equipment (capitalized internal-use software)		1,909	2,313		4,231	4,522
Total stock-based compensation		67,409	121,755		134,878	196,583
Stock-based compensation, CRO agreement	$ 52,200
Revenue - subscription and transaction fees | Subscription and transaction fees
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total amount charged to loss from operations		486	0	$ 856	0
Cost of revenue
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total amount charged to loss from operations		2,388	2,298		4,934	4,299
Research and development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total amount charged to loss from operations		26,160	26,981		53,526	47,831
Sales and marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total amount charged to loss from operations		12,789	69,522		26,674	98,779
General and administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total amount charged to loss from operations		20,322	20,641		41,302	41,152
Restructuring
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total amount charged to loss from operations		$ 3,355	$ 0		$ 3,355	$ 0