Fess vs OpenSearch
| Fess | OpenSearch | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | Free |
| Open source | No | No |
| Platforms | api, Linux, macOS, self-hosted, Web, Windows | api, Linux, macOS, self-hosted, Web, Windows |
| Free plan | Yes | — |
| Permission sync | Yes | — |
| Answer citations | Yes | — |
| Deployment options | self-hosted | — |
| Admin controls | Yes | — |
Both are listed in Best AI Enterprise Search Software. On Freedom251, OpenSearch scores higher on our published basis.