Lean vs Romeo
| Lean | Romeo | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Linux, macOS, Web, Windows | — |
| Verification method | deductive | model-checking |
| Supported formalisms | theorem-proving | temporal-logic |
| Proof artifacts | Yes | — |
| Input languages | Lean 4 | Timed Petri Nets |
| Deployment | both | self-hosted |
| Free plan | — | Yes |
Both are listed in Best Formal Verification Tools. On Specifiction, Lean scores higher on our published basis.