| Cover | Nov. 04, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 4, 2021 |
| Entity Registrant Name | ALKAMI TECHNOLOGY, INC |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-40321 |
| Entity Tax Identification Number | 45-3060776 |
| Entity Address, Address Line One | 5601 Granite Parkway |
| Entity Address, Address Line Two | Suite 120 |
| Entity Address, City or Town | Plano |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 75024 |
| City Area Code | 877 |
| Local Phone Number | 725-5264 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value per share |
| Trading Symbol | ALKT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001529274 |
| Amendment Flag | false |
