| Cover | 12 Months Ended | |
| Aug. 30, 2024 | Dec. 31, 2024 | |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Aug. 30, 2024 | |
| Entity Registrant Name | Allbirds, Inc. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-40963 | |
| 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 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Class A common stock, $0.0001 par value | |
| Trading Symbol | BIRD | |
| Security Exchange Name | NASDAQ | |
| Entity Emerging Growth Company | true | |
| Entity Ex Transition Period | false | |
| Entity Central Index Key | 0001653909 | |
| Amendment Flag | false | |
| Current Fiscal Year End Date | --12-31 |
