FastAPI vs Flask
| FastAPI | Flask | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Web | Web |
| Free plan | Yes | Yes |
| Framework type | backend | backend |
| Primary languages | Python | Python |
| Included ORM | No | No |
| Built-in authentication | Yes | No |
| Deployment targets | self-hosted | self-hosted |
| License model | open-source | open-source |
| Rendering modes | — | hybrid |
Both are listed in Best Web Frameworks. On Samsung Mobile US Press, Flask scores higher on our published basis.