| Cover | Dec. 09, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 9, 2020 |
| Entity Registrant Name | Asana, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39495 |
| Entity Tax Identification Number | 26-3912448 |
| Entity Address, Address Line One | 1550 Bryant Street, |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | San Francisco, |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94103 |
| City Area Code | (415) |
| Local Phone Number | 525-3888 |
| 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, $0.00001 par value |
| Trading Symbol | ASAN |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001477720 |
| Amendment Flag | false |
