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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash Flows from Operating Activities    
Net loss $ (192,908) $ (88,900)
Adjustments to reconcile net loss to cash provided by operating activities:    
Depreciation and amortization expense 123,170 87,688
Non-cash operating lease costs 41,696 29,872
Amortization of deferred contract acquisition costs 63,486 47,296
Stock-based compensation expense 274,113 217,912
Amortization of debt issuance costs 4,865 2,189
Net accretion of discounts and amortization of premiums on available-for-sale securities (13,233) (11,987)
Deferred income taxes (7,013) (480)
Provision for bad debt 5,157 7,815
Other (6,814) 3,227
Changes in operating assets and liabilities, net of effect of asset acquisitions and business combinations:    
Accounts receivable, net (45,614) 1,431
Contract assets (3,656) (4,707)
Deferred contract acquisition costs (84,510) (58,998)
Prepaid expenses and other current assets (60,612) (46,339)
Other noncurrent assets 7,142 4,312
Accounts payable 1,205 (247)
Accrued expenses and other current liabilities 48,699 758
Accrued compensation 40,523 (2,914)
Operating lease liabilities (45,567) (24,973)
Deferred revenue 127,144 82,643
Other noncurrent liabilities (1,379) (18)
Net cash provided by operating activities 275,894 245,580
Cash Flows from Investing Activities    
Purchases of property and equipment (115,192) (145,786)
Capitalized internal-use software (20,244) (13,647)
Asset acquisitions and business combinations, net of cash acquired (75,098) (6,462)
Purchases of available-for-sale securities (783,933) (1,530,775)
Maturities of available-for-sale securities 1,442,199 810,825
Other investing activities 1,636 382
Net cash provided by (used in) investing activities 449,368 (885,463)
Cash Flows from Financing Activities    
Proceeds from settlement of the 2025 capped calls 0 309,616
Gross proceeds from issuance of 2030 convertible senior notes 0 2,000,000
Purchases of capped calls related to the 2030 convertible senior notes 0 (283,400)
Cash paid for issuance costs on 2030 convertible senior notes 0 (27,873)
Proceeds from the exercise of stock options 9,815 17,942
Proceeds from the issuance of common stock for employee stock purchase plan 16,075 13,057
Payment of tax withholding obligation on RSU and PSU settlement (29,473) (18,217)
Payment of indemnity holdback (100) 0
Net cash provided by (used in) financing activities (3,683) 2,011,125
Net increase in cash, cash equivalents, and restricted cash 721,579 1,371,242
Cash, cash equivalents, and restricted cash, beginning of period 954,357 154,214
Cash, cash equivalents, and restricted cash, end of period 1,675,936 1,525,456
Supplemental Disclosure of Cash Flow Information:    
Cash paid for interest 32 9
Cash paid for income taxes, net of refunds 4,154 3,503
Cash paid for operating lease liabilities 43,179 32,378
Supplemental Disclosure of Non-cash Investing and Financing Activities:    
Stock-based compensation capitalized for software development and cloud computing arrangements 7,081 5,952
Accounts payable and accrued expenses related to property and equipment additions 71,412 51,090
Operating lease right-of-use assets obtained in exchange for operating lease liabilities 45,897 46,270
Issuance of common stock related to an acquisition $ 98,686 $ 0