Dafny vs F*
| Dafny | F* | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Linux, macOS, self-hosted, Windows | Windows, Linux, macOS |
| Free plan | Yes | — |
| Verification method | deductive | hybrid |
| Supported formalisms | contracts | theorem-proving |
| Counterexamples | Yes | — |
| Input languages | Dafny | F* |
| Deployment | self-hosted | self-hosted |
Both are listed in Best Formal Verification Tools. On The Geeks Club, Dafny scores higher on our published basis.