cargo-mutants vs Cosmic Ray
| cargo-mutants | Cosmic Ray | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | — | Linux, self-hosted |
| Supported languages | Rust | Python 3 |
| Test frameworks | cargo test; cargo nextest | unittest, pytest, nose |
| Incremental analysis | Yes | Yes |
| Parallel execution | Yes | Yes |
| Surviving mutant reports | Yes | Yes |
| Mutation quality gate | Yes | — |
| Mutation operators | Function-body value replacement; binary-operator replacement; unary-operator deletion; match-arm deletion; match-guard replacement; struct-literal field deletion | 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 |
| Free plan | — | Yes |
Both are listed in Best Mutation Testing Tools. On Samsung Mobile US Press, Cosmic Ray scores higher on our published basis.