Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2019	Jan. 31, 2019
Current assets:
Cash and cash equivalents	$ 732,808	$ 88,408
Marketable securities	94,003	103,247
Accounts receivable, net of allowance for doubtful accounts of $1.0 million as of July 31, 2019 and January 31, 2019	115,256	92,476
Deferred contract acquisition costs, current	34,017	28,847
Prepaid expenses and other current assets	29,348	18,410
Total current assets	1,005,432	331,388
Property and equipment, net	107,989	73,735
Deferred contract acquisition costs, noncurrent	41,766	9,918
Goodwill	7,780	7,947
Intangible assets, net	738	1,048
Other assets	7,881	9,183
Total assets	1,171,586	433,219
Current liabilities:
Accounts payable	1,126	6,855
Accrued expenses	32,568	32,541
Accrued payroll and benefits	20,057	19,284
Deferred revenue	279,951	218,700
Other current liabilities	8,079	4,040
Total current liabilities	341,781	281,420
Deferred revenue, noncurrent	89,811	71,367
Other liabilities, noncurrent	11,897	10,313
Total liabilities	443,489	363,100
Commitments and contingencies (Note 11)
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock, $0.0005 par value; no shares and 137,419 shares authorized as of July 31, 2019 and January 31, 2019, respectively; no shares and 131,268 shares issued and outstanding as of July 31, 2019 and January 31, 2019, respectively; liquidation preference $0 and $545,000 as of July 31, 2019 and January 31, 2019, respectively		557,912
Stockholders' Equity (Deficit)
Preferred stock, $0.0005 par value; 100,000 shares and no shares authorized as of July 31, 2019 and January 31, 2019, respectively; no shares issued and outstanding as of both July 31, 2019 and January 31, 2019, respectively
Common stock, value		24
Additional paid-in capital	1,302,098	31,211
Accumulated deficit	(573,574)	(519,126)
Accumulated other comprehensive income (loss)	(530)	98
Total stockholders' equity (deficit)	728,097	(487,793)
Total liabilities, redeemable convertible preferred stock, and stockholders' equity (deficit)	1,171,586	$ 433,219
Class A and Class B common stock
Stockholders' Equity (Deficit)
Common stock, value	$ 103