COVER - shares	9 Months Ended
	Sep. 30, 2024	Nov. 04, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-39463
Entity Registrant Name	Ouster, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-2528989
Entity Address, Address Line One	350 Treat Avenue
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94110
City Area Code	415
Local Phone Number	949-0108
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		49,770,639
Amendment Flag	false
Entity Central Index Key	0001816581
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Common stock, $0.0001 par value per share
Document Information [Line Items]
Title of 12(b) Security	Common stock, $0.0001 par value per share
Trading Symbol	OUST
Security Exchange Name	NYSE
Warrants to purchase common stock expiring 2026
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock expiring 2026
Trading Symbol	OUST WS
Security Exchange Name	NYSE
Warrants to purchase common stock expiring 2025
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock expiring 2025
Trading Symbol	OUST WSA
Security Exchange Name	NYSEAMER