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