Best Mutation Testing Tools in 2026
Updated
In short: ArcMutate is ranked #1 of 25 as of 4 October 2026, ahead of Mutant and Mutatest. The best-ranked option with a free plan is Mutant. The lowest first paid tier on this page is ArcMutate at $8/mo.
Mutation testing gives you a way to examine whether tests catch changes made to code. Compare supported languages and test frameworks, along with the mutation operators available; then weigh incremental analysis and parallel execution against your workflow. Surviving mutant reports and mutation quality gates describe how results can be surfaced and used, while free-plan availability and paid-from pricing add cost considerations. ArcMutate, PIT, and Infection lead the ranked entries, followed by Stryker Mutator and Mutatest. Use the listed criteria to assess compatibility with your codebase and the execution and reporting capabilities you need.
25 mutation testing tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 ArcMutate Top pick · 7.2 Free plan · $8/mo
#2 Mutant Runner-up · 7.1 Free plan · $20.83/mo
#3 Mutatest Also great · 7.1 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
RecognisedDocumentedFree planPlatforms$8/mofirst paid tier About ArcMutateVisit site - 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
RecognisedDocumentedFree planPlatforms$20.83/mofirst paid tier About MutantVisit site - Free plan LinuxmacOSWindows
- Free plan
- Yes
- Supported languages
- Python
- Test frameworks
- pytest
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms - LinuxmacOSWeb
- Free plan
- Yes
- Supported languages
- PHP
- Test frameworks
- PHPUnit, PhpSpec, Codeception, Testo
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms - 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
RecognisedDocumentedFree planPlatforms - LinuxmacOSWindows
- Free plan
- Yes
- Supported languages
- R
- Test frameworks
- testthat; cucumber
- Incremental analysis
- Yes
RecognisedDocumentedFree planPlatforms - 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
RecognisedDocumentedFree planPlatforms - Linuxself-hosted
- Free plan
- Yes
- Supported languages
- Python 3
- Test frameworks
- unittest, pytest, nose
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms - Linuxself-hosted
- Free plan
- Yes
- Supported languages
- C, C++
- Test frameworks
- GoogleTest, CTest, Makefile
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms - WindowsmacOSLinux
- Supported languages
- Python
- Test frameworks
- pytest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms - macOSLinuxWindows
- Free plan
- Yes
- Supported languages
- Solidity
RecognisedDocumentedFree planPlatforms - WindowsLinux
- Free plan
- Yes
- Supported languages
- Java
- Test frameworks
- JUnit
RecognisedDocumentedFree planPlatforms - macOS
- Supported languages
- Swift
- Test frameworks
- Xcode test targets; Swift Package Manager tests
- Incremental analysis
- Yes
RecognisedDocumentedFree planPlatforms -
- Supported languages
- Rust
- Test frameworks
- cargo test; cargo nextest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms -
- Free plan
- Yes
- Supported languages
- R
- Test frameworks
- testthat; tinytest; generic installed-tests fallback
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms -
- Supported languages
- JavaScript, TypeScript
- Test frameworks
- Vitest, Jest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms -
- Free plan
- Yes
- Supported languages
- Python
- Test frameworks
- pytest; tox
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms -
- Supported languages
- Python
- Test frameworks
- pytest
- Incremental analysis
- Yes
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms - Web
- Free plan
- Yes
- Supported languages
- JavaScript, TypeScript, C#, Scala, and other languages supported by compatible mutation-testing frameworks
- Incremental analysis
- Yes
RecognisedDocumentedFree planPlatforms -
- Supported languages
- Go
- Test frameworks
- Go package tests
RecognisedDocumentedFree planPlatforms -
- Free plan
- Yes
- Supported languages
- Java
RecognisedDocumentedFree planPlatforms -
- Supported languages
- Rust
- Test frameworks
- Cargo test
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms -
- Supported languages
- JavaScript
- Parallel execution
- Yes
RecognisedDocumentedFree planPlatforms -
- Supported languages
- Python 3.3+
- Test frameworks
- unittest; pytest (experimental)
RecognisedDocumentedFree planPlatforms -
- Supported languages
- Rust
- Test frameworks
- Rust/Cargo tests
RecognisedDocumentedFree planPlatforms
Is your app 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 Everything Xiaomi?
ArcMutate is ranked #1 of 25 with a score of 7.2. Mutant is second and Mutatest third.
How many of these have a free plan?
4 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: documentation depth, a free tier and the platforms it runs on. Paid placements never change a rank.