Mutatest is a free command-line tool for Python that checks whether tests catch small changes to code.
Alternatives to muttest-rs
ArcMutate extends PiTest with mutation testing for Java, Kotlin, and Android software.
Mutant is mutation testing software for Ruby.
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MuJava
MuJava is a free, open-source tool for mutation testing Java programs.
Free planLinuxmacOSWindows6.3Free plan - 56.3Free plan
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go-mutesting
go-mutesting is a free, MIT-licensed framework for mutation testing Go code.
Free planLinuxSelf-hosted6.2Free plan - 7
LittleDarwin
LittleDarwin is a Java mutation testing framework written in Python for Linux.
Free planLinux6.2Free plan - 8
MutPy
MutPy is a free, open-source mutation testing tool for Python source code that helps developers check whether their tests detect changes.
Free planLinuxSelf-hosted6.2Free plan - 9
pytest-gremlins
pytest-gremlins is a free, MIT-licensed pytest plugin that checks whether an existing test suite catches small changes to Python code.
Free planLinux6.1Free plan - 10

Infection
Infection is a free PHP mutation-testing library that checks whether a test suite catches changes to source code.
WebLinuxmacOS6.0 - 11
Stryker Dashboard
Stryker Dashboard hosts mutation-testing reports online and provides a mutation score badge for repositories.
Free planWebAPI6.0Free plan - 12
Muter
Muter is a free, open-source utility for assessing Swift test suites through mutation testing.
Free planmacOSSelf-hosted5.8Free plan - 13

Stryker Mutator
Stryker Mutator assesses how well unit tests catch code changes by introducing mutations and running the tests against the altered code.
Free planAPISelf-hosted5.8Free plan - 145.7
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mutmut
mutmut is an open-source mutation testing system for Python that helps teams check whether their pytest tests catch changes to code.
LinuxmacOSSelf-hostedWindows5.7 - 16
muttest
muttest is an R package for mutation testing: it makes selected changes to code and runs tests to see which changes the test suite catches.
LinuxmacOSWindows5.7 - 17

PIT
PIT is a free mutation-testing tool for Java and JVM bytecode projects.
LinuxmacOSSelf-hostedWindows5.5 - 185.4
- 195.4
- 205.3
- 21
Dextool Mutate
Dextool Mutate is a free mutation-testing tool for C and C++ that checks whether tests detect artificially introduced faults.
LinuxSelf-hosted5.2 - 22
mutest-rs
mutest-rs is a free, open-source Rust tool for checking how effectively a test suite detects code changes.
5.2 - 23
Mutode
Mutode is free, open-source mutation testing software for JavaScript and Node.js projects.
5.2 - 24
Mutineer
Mutineer is a free, open-source mutation testing framework for JavaScript and TypeScript.
4.9
