ArcMutate vs Cosmic Ray
| ArcMutate | Cosmic Ray | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | $8/mo | — |
| Open source | No | No |
| Platforms | Linux, macOS, self-hosted, Windows | Linux, self-hosted |
| Free plan | Yes | Yes |
| Supported languages | Java, Kotlin, Groovy | Python 3 |
| Test frameworks | JUnit 4, JUnit 5, Spring Test, Mockito, MockK, Robolectric | unittest, pytest, nose |
| Incremental analysis | Yes | Yes |
| Parallel execution | Yes | Yes |
| Surviving mutant reports | Yes | Yes |
| Mutation quality gate | Yes | — |
| Mutation operators | Extended, extreme, chained calls, varargs, one-less-parameter, remove distinct/filter/limit/skip/sorted, predicate operators, field writes, parameter swaps, stream match swaps, reactive return and mapping operators, Groovy boundary and conditional operators, Spring annotation 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 |
Both are listed in Best Mutation Testing Tools. On Samsung Mobile US Press, ArcMutate scores higher on our published basis.