HOL Light vs Viper
| HOL Light | Viper | |
|---|---|---|
| Platforms | Linux, macOS, self-hosted, Web, Windows | extension, Linux, macOS, Web, Windows |
| Free plan | Yes | Yes |
| Verification method | deductive | hybrid |
| Supported formalisms | theorem-proving | contracts |
| Input languages | OCaml; higher-order logic | Viper language; Go, Python, and Rust via front-end tools |
| Deployment | self-hosted | self-hosted |
| Counterexamples | Yes |
Listed together in Best Formal Verification Tools