Best Mutation Testing Tools in 2026
25 mutation testing tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
25ranked
15free plans on this page
$8/molowest paid tier
2 Oct 2026last checked
#1 ArcMutate Top pick · 9.2 Free plan · $8/mo
#2 PIT Runner-up · 8.7 Free plan · Free
#3 Infection Also great · 8.7 Free plan · Free
- Free planFree trial LinuxmacOSself-hostedWindows
- Free plan
- Yes
- Supported languages
- Java, Kotlin, Groovy
- Test frameworks
- JUnit 4, JUnit 5, Spring Test, Mockito, MockK, Robolectric
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial$8/mofirst paid tier About ArcMutateVisit site - Free plan LinuxmacOSself-hostedWindows
- Free plan
- Yes
- Supported languages
- Java and JVM bytecode
- Test frameworks
- JUnit 3, JUnit 4, TestNG; JUnit 5 via plugin
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trialFree About PITVisit site - Free plan LinuxmacOSWeb
- Free plan
- Yes
- Supported languages
- PHP
- Test frameworks
- PHPUnit, PhpSpec, Codeception, Testo
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan apiself-hosted
- Free plan
- Yes
- Supported languages
- JavaScript, TypeScript, C#, Scala
- Test frameworks
- Cucumber, Jasmine, Jest, Karma, Mocha, Tap, Vitest, command runner
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan LinuxmacOSWindows
- Free plan
- Yes
- Supported languages
- Python
- Test frameworks
- pytest
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan LinuxmacOS
- Free plan
- Yes
- Paid from
- 30 /mo
- Supported languages
- Ruby
- Test frameworks
- RSpec, Minitest, Test::Unit
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial$20.83/mofirst paid tier About MutantVisit site - Free plan Linux
- Free plan
- Yes
- Supported languages
- C, C++
- Test frameworks
- GoogleTest, CTest, Makefile
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan LinuxmacOSWindows
- Free plan
- Yes
- Supported languages
- R
- Test frameworks
- testthat; cucumber
- Incremental analysis
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan
- Free plan
- Yes
- Supported languages
- Python 3
- Test frameworks
- unittest, pytest, nose
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan
- Free plan
- Yes
- Supported languages
- R
- Test frameworks
- testthat; tinytest; generic installed-tests fallback
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- Python
- Test frameworks
- pytest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - WindowsmacOSLinux
- Supported languages
- Python
- Test frameworks
- pytest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan WindowsLinux
- Free plan
- Yes
- Supported languages
- Java
- Test frameworks
- JUnit
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- Rust
- Test frameworks
- cargo test; cargo nextest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan macOSLinuxWindows
- Free plan
- Yes
- Supported languages
- Solidity
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- JavaScript, TypeScript
- Test frameworks
- Vitest, Jest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan
- Free plan
- Yes
- Supported languages
- Java
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- Python 3.3+
- Test frameworks
- unittest; pytest (experimental)
RecognisedDocumentedPlatformsFree planFree trial - Free plan
- Free plan
- Yes
- Supported languages
- Python
- Test frameworks
- pytest; tox
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial - macOS
- Supported languages
- Swift
- Test frameworks
- Xcode test targets; Swift Package Manager tests
- Incremental analysis
- Yes
RecognisedDocumentedPlatformsFree planFree trial - Free plan Web
- Free plan
- Yes
- Supported languages
- JavaScript, TypeScript, C#, Scala, and other languages supported by compatible mutation-testing frameworks
- Incremental analysis
- Yes
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- JavaScript
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- Go
- Test frameworks
- Go package tests
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- Rust
- Test frameworks
- Cargo test
- Parallel execution
- Yes
RecognisedDocumentedPlatformsFree planFree trial -
- Supported languages
- Rust
- Test frameworks
- Rust/Cargo tests
RecognisedDocumentedPlatformsFree planFree trial
Is your tool on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which mutation testing tool is ranked first on Specifiction?
ArcMutate is ranked #1 of 25 with a score of 9.2. PIT is second and Infection third.
How many of these have a free plan?
15 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, ArcMutate has the lowest first paid tier we found: $8/mo.
How is this list ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing. Paid placements never change a rank.
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