Cosmic Ray comparisons

Cosmic Ray head-to-head

• CRCosmic Ray vs ArcMutate
• CRCosmic Ray vs PIT
• CRCosmic Ray vs Stryker Mutator
• CRCosmic Ray vs Infection
• CRDMCosmic Ray vs Dextool Mutate
• CRMCosmic Ray vs Mutatest
• CRMCosmic Ray vs Mutant

Cosmic Ray vs each of them

#	Tool	Free plan	Paid from	Supported languages	Test frameworks	Incremental analysis	Parallel execution	Mutation quality gate	Score
5	CRCosmic Ray	Yes	None	Python 3	unittest, pytest, nose	Yes	Yes	—	7.1
1	ArcMutate	Yes	—	Java, Kotlin, Groovy	JUnit 4, JUnit 5, Spring Test, Mockito, MockK, Robolectric	Yes	Yes	Yes	9.8
2	PIT	Yes	None	Java and JVM bytecode	JUnit 3, JUnit 4, TestNG; JUnit 5 via plugin	Yes	Yes	Yes	8.2
3	Stryker Mutator	Yes	None	JavaScript, TypeScript, C#, Scala	Cucumber, Jasmine, Jest, Karma, Mocha, Tap, Vitest, command runner	Yes	Yes	Yes	7.7
4	Infection	Yes	None	PHP	PHPUnit, PhpSpec, Codeception, Testo	Yes	Yes	Yes	7.4
6	DMDextool Mutate	Yes	None	C, C++	GoogleTest, CTest, Makefile	Yes	Yes	—	6.9
7	MMutatest	Yes	None	Python	pytest	—	Yes	Yes	6.8
8	MMutant	Yes	$30/mo	Ruby	RSpec, Minitest, Test::Unit	Yes	Yes	—	6.7

Compare Cosmic Ray with any mutation testing tool

These are the matchups our editors wrote up. The compare tool pairs Cosmic Ray with any other product in Mutation Testing Tools — and up to four at once — from the same checked specs.

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Compared by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated 28 Sep 2026 · How we research and update