Cover - shares	9 Months Ended
	Sep. 30, 2023	Oct. 27, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-36324
Entity Registrant Name	VARONIS SYSTEMS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	57-1222280
Entity Address, Address Line One	1250 Broadway, 28th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10001
City Area Code	877
Local Phone Number	292-8767
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	VRNS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		108,953,058
Entity Central Index Key	0001361113
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false