Cover page - shares	6 Months Ended
	Jul. 31, 2020	Aug. 24, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 31, 2020
Document Transition Report	false
Entity File Number	001-38056
Entity Registrant Name	YEXT, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-8059722
Entity Address, Address Line One	61 Ninth Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10011
City Area Code	212
Local Phone Number	994-3900
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	YEXT
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Reporting Company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		119,611,368
Entity Central Index Key	0001614178
Current Fiscal Year End Date	--01-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false