| Cover | May 10, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | May 10, 2022 |
| 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 | 730 Montgomery Street |
| 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 |
