fast-check vs Rapid
| fast-check | Rapid | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | Free |
| Open source | No | No |
| Platforms | api, Linux, Web | self-hosted |
| Free plan | Yes | Yes |
| Supported languages | JavaScript, TypeScript | Go |
| Test runner support | Jest, Mocha, Vitest, Ava, Bun, Deno, Node.js test runner | Go testing package; go test |
| Failing-case shrinking | Yes | Yes |
| Stateful testing | Yes | Yes |
| Reproducible failures | Yes | Yes |
Both are listed in Best Property-Based Testing Tools. On The Geeks Club, fast-check scores higher on our published basis.