Cosmic Ray vs muttest
| Cosmic Ray | muttest | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Linux, self-hosted | Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Supported languages | Python 3 | R |
| Test frameworks | unittest, pytest, nose | testthat; cucumber |
| 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 | Binary operators; arithmetic operators; comparison operators; logical operators; boolean literals; NA/NULL literals; numeric literals; string literals; condition negation; function-call names; index increments/decrements; explicit return values |
| Mutation quality gate | — | Yes |
Both are listed in Best Mutation Testing Tools. On Inferse, Cosmic Ray scores higher on our published basis.