TLA+ vs Why3
| TLA+ | Why3 | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Windows, macOS, Linux | Web, Linux, Windows |
| Verification method | hybrid | deductive |
| Supported formalisms | invariants | contracts |
| Counterexamples | Yes | Yes |
| Input languages | TLA+ and PlusCal | WhyML, micro-C, micro-Python, MLCFG, Coma |
| Deployment | both | both |
Both are listed in Best Formal Verification Tools. On Samsung Mobile US Press, Why3 scores higher on our published basis.