Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Revenue
Subscription	$ 62,705	$ 38,123	$ 167,142	$ 99,125
Professional services and other	5,533	4,160	15,098	12,381
Total revenue	68,238	42,283	182,240	111,506
Cost of revenue
Subscription	13,553	8,597	37,401	24,523
Professional services and other	7,570	5,506	20,867	15,739
Total cost of revenue	21,123	14,103	58,268	40,262
Gross profit	47,115	28,180	123,972	71,244
Operating expenses
Research and development	19,190	9,706	51,472	28,127
Sales and marketing	49,606	32,442	126,383	87,264
General and administrative	13,546	7,922	37,133	21,009
Total operating expenses	82,342	50,070	214,988	136,400
Operating loss	(35,227)	(21,890)	(91,016)	(65,156)
Other income, net	509	50	872	138
Loss before income taxes	(34,718)	(21,840)	(90,144)	(65,018)
Provision (benefit) for income taxes	(940)	91	(463)	267
Net loss	$ (33,778)	$ (21,931)	$ (89,681)	$ (65,285)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.35)	$ (1.14)	$ (1.17)	$ (3.46)
Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted (in shares)	95,474	19,174	76,950	18,850