PropEr vs Rapid
| PropEr | Rapid | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | — | self-hosted |
| Free plan | Yes | Yes |
| Supported languages | Erlang | Go |
| Test runner support | EUnit, Common Test | Go testing package; go test |
| Failing-case shrinking | Yes | Yes |
| Stateful testing | Yes | Yes |
| Reproducible failures | — | Yes |
Both are listed in Best Property-Based Testing Tools. On Samsung Mobile US Press, Rapid scores higher on our published basis.