CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net income (loss)	$ 22,392	$ (78,541)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	5,630	4,119
Share-based compensation	6,680	14,153
Bad debt expense	41	56
Write-off of capital assets	(6)	37
Amortization of operating lease right-of-use assets	37,646
Write-off of debt issuance costs	362	0
Straight-line rent	0	3,112
Unrealized loss on foreign currency transactions	2,379	1,571
Amortization of debt issuance costs	8,750	239
Amortization of debt discounts	(3,007)	1,988
Change in fair value of share-settled redemption feature and gain on conversion of Convertible Notes	(29,512)	0
Change in fair value of derivative instruments	0	592
Change in fair value of warrants	0	1,532
Change in fair value of SPAC Warrants	(26,324)	0
Change in fair value of Earn Out liability	(73,177)	0
Other adjustments to net income (loss)	285	7
Changes in operating assets and liabilities:
Accounts receivable	3,233	(2,106)
Prepaid rent	(446)	7,383
Prepaid expenses	(9,408)	(686)
Other current assets	(2,059)	(30)
Other non-current assets	6,488	(1,765)
Accounts payable	(22,009)	(3,242)
Accrued liabilities	4,742	3,390
Sales tax payable	2,963	345
Deferred revenue	15,253	7,342
Operating lease assets and operating lease liabilities, net	(4,754)
Other current liabilities	194	5
Other non-current liabilities	2,971	191
Net cash used in operating activities	(50,693)	(40,308)
Cash flows from investing activities
Purchase of property and equipment	(10,539)	(1,675)
Development of internal-use software	(1,077)	(1,001)
Net cash used in investing activities	(11,616)	(2,676)
Cash flows from financing activities
Proceeds from Delayed Draw Notes, net of issuance costs of $5,775	159,225	0
Proceeds from Convertible Notes, net of issuance costs of $2,362	0	162,638
Repayment of debt	(24,680)	(2,018)
Debt extinguishment costs	(3,065)	0
Proceeds from Business Combination and PIPE offering	325,928	0
Issuance costs of common stock	(58,555)	0
Proceeds from exercise of stock options	873	746
Issuance of redeemable convertible preferred stock	0	1,020
Net cash provided by financing activities	399,726	162,386
Effects of foreign exchange on cash	(327)	(280)
Net change in cash and restricted cash	337,090	119,122
Cash and restricted cash at the beginning of period	69,941	123,108
Cash and restricted cash at end of period	407,031	242,230
Supplemental disclosures of cash flow information:
Cash paid for income taxes during the year	381	43
Cash paid for interest during the year	1,873	1,082
Non-cash disclosure of investing and financing activities:
Accrued purchases of property and equipment	1,789	0
Conversion of Convertible Notes	159,172	0
Conversion of Legacy Sonder Warrants	1,243	0
Reclassification of liability-classified Legacy Sonder Warrants to equity	2,111	0
Recognition of Earn Out liability	(98,117)	0
Issuance of Delayed Draw Warrants	5,598	0
Reconciliation of cash and restricted cash:
Cash	406,348	241,730
Restricted cash	683	500
Total cash and restricted cash	$ 407,031	$ 242,230