Stainless vs VeriFast
| Stainless | VeriFast | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Linux, macOS, Windows | Windows, macOS, Linux |
| Free plan | Yes | — |
| Verification method | deductive | symbolic |
| Supported formalisms | contracts | contracts |
| Counterexamples | Yes | — |
| Input languages | Scala 3 | C, Rust, Java |
| Deployment | self-hosted | self-hosted |
Both are listed in Best Formal Verification Tools. On Samsung Mobile US Press, Stainless scores higher on our published basis.