Cosmic Ray vs Muter
| Cosmic Ray | Muter | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | No |
| Platforms | Linux, self-hosted | macOS, self-hosted |
| Free plan | Yes | — |
| Supported languages | Python 3 | Swift |
| Test frameworks | unittest, pytest, nose | Xcode test targets; Swift Package Manager tests |
| Incremental analysis | Yes | Yes |
| Parallel execution | Yes | — |
| Surviving mutant reports | Yes | Yes |
| Mutation operators | binary operator replacement; boolean replacement; break/continue replacement; comparison operator replacement; exception replacement; keyword replacement; number replacement; decorator removal; unary operator replacement; zero-iteration for loops | RelationalOperatorReplacement; RemoveSideEffects; ChangeLogicalConnector; SwapTernary |
Both are listed in Best Mutation Testing Tools. On Everything Xiaomi, Muter scores higher on our published basis.