| RESTful APIs | Yes | |
| GraphQL | Yes | |
| Websockets | Yes | |
| Background workers | Partial | FL0 runs a healthcheck and expects your app to be listening on the port specified by the PORT environment variable. If your app doesn't listen to a port, deployments may fail. |
| Static sites | Yes | Static sites can be deployed but require some configuration |
| Frontend | Partial | You can deploy frontends on FL0, but you can't yet connect a custom domain or make use of a built-in CDN. |
| Virtual Machines | No | FL0 builds containers and doesn't support running virtual machines |
| Monorepos | Yes | See Configuring Build Settings. |