Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Revenue		$ 1,080,677	$ 893,543	$ 2,115,884	$ 1,694,843
Costs and expenses:
Cost of revenue	[1]	236,113	198,557	460,838	377,423
Developer exchange fees		316,371	208,270	597,935	410,675
Infrastructure and trust & safety		260,684	221,064	502,811	447,998
Research and development		384,996	361,684	759,596	723,749
General and administrative		152,166	105,627	271,298	203,451
Sales and marketing		52,807	36,290	100,575	71,824
Total costs and expenses		1,403,137	1,131,492	2,693,053	2,235,120
Loss from operations		(322,460)	(237,949)	(577,169)	(540,277)
Interest income		48,844	44,383	95,167	86,553
Interest expense		(10,342)	(10,204)	(20,692)	(20,567)
Other income/(expense), net		5,131	(3,315)	8,390	(3,661)
Loss before income taxes		(278,827)	(207,085)	(494,304)	(477,952)
Provision for/(benefit from) income taxes		973	110	1,836	1,163
Consolidated net loss		(279,800)	(207,195)	(496,140)	(479,115)
Net loss attributable to noncontrolling interest		(1,425)	(1,312)	(2,709)	(2,628)
Net loss attributable to common stockholders		$ (278,375)	$ (205,883)	$ (493,431)	$ (476,487)
Net loss per share attributable to common stockholders, basic (in dollars per share)		$ (0.41)	$ (0.32)	$ (0.73)	$ (0.75)
Net loss per share attributable to common stockholders, diluted (in dollars per share)		$ (0.41)	$ (0.32)	$ (0.73)	$ (0.75)
Weighted-average shares used in computing net loss per share attributable to common stockholders—basic (in shares)		684,837	642,814	678,307	638,917
Weighted-average shares used in computing net loss per share attributable to common stockholders—diluted (in shares)		684,837	642,814	678,307	638,917

[1] Depreciation of servers and infrastructure equipment included in infrastructure and trust & safety.