Cosmic Ray vs Mutant
| Cosmic Ray | Mutant | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | $20.83/mo |
| Open source | No | No |
| Platforms | Linux, self-hosted | Linux, macOS |
| Free plan | Yes | Yes |
| Supported languages | Python 3 | Ruby |
| Test frameworks | unittest, pytest, nose | RSpec, Minitest, Test::Unit |
| Incremental analysis | Yes | Yes |
| Parallel execution | Yes | 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 | Arithmetic, logical, bitwise, statement removal, return-value modification, ordering |
| Paid from | — | 30 /mo |
Both are listed in Best Mutation Testing Tools. On Inferse, Mutant scores higher on our published basis.