Drools vs FlexRule Open
| Drools | FlexRule Open | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | api, Linux, self-hosted | api, Linux, macOS, self-hosted, Web, Windows |
| Decision tables | Yes | Yes |
| Visual rule authoring | Yes | Yes |
| Rule testing tools | Yes | Yes |
| DMN support | Yes | Yes |
| Natural-language rules | Yes | Yes |
| Execution access | both | both |
| Deployment options | — | hybrid |
Both are listed in Best Business Rules Management Software. On The Geeks Club, Drools scores higher on our published basis.