Cover - USD ($) $ in Billions	12 Months Ended
	Jan. 31, 2022	Mar. 31, 2022	Jul. 31, 2021
Entity Information [Line Items]
Document Type	10-K
Document Anual Report	true
Document Period End Date	Jan. 31, 2022
Current Fiscal Year End Date	--01-31
Document Transition Report	false
Entity File Number	001-40531
Entity Registrant Name	SENTINELONE, INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	99-0385461
Entity Address, Address Line One	444 Castro Street, Suite 400
Entity Address, City or Town	Mountain View
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94041
City Area Code	855
Local Phone Number	868-3733
Title of 12(b) Security	Class A common stock, par value $0.0001
Trading Symbol	S
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Public Float			$ 6.9
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Central Index Key	0001583708
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		185,652,297
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		86,103,088