| Cover page | Aug. 11, 2021 | Jun. 08, 2021 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Aug. 11, 2021 | |
| Entity Registrant Name | MARQETA, INC. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-40465 | |
| Entity Tax Identification Number | 27-4306690 | |
| Entity Address, Address Line One | 180 Grand Avenue | |
| Entity Address, Address Line Two | 6th Floor | |
| Entity Address, City or Town | Oakland | |
| Entity Address, State or Province | CA | |
| Entity Address, Postal Zip Code | 94612 | |
| City Area Code | 888 | |
| Local Phone Number | 462-7738 | |
| 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 per share | |
| Trading Symbol | MQ | |
| Security Exchange Name | NASDAQ | |
| Entity Emerging Growth Company | true | |
| Entity Ex Transition Period | false | |
| Entity Central Index Key | 0001522540 | |
| Amendment Flag | false |
