COVER - shares	9 Months Ended
	Sep. 30, 2024	Nov. 01, 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	001-40963
Entity Registrant Name	Allbirds, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	47-3999983
Entity Address, Address Line One	30 Hotaling Place
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94111
City Area Code	628
Local Phone Number	225-4848
Title of 12(b) Security	Class A Common Stock, $0.0001 par value per share
Trading Symbol	BIRD
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001653909
Amendment Flag	false
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,390,015
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,542,355