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Tech riderRev. 20 Sept 2026

mutmut

Ch 126.2of 25 Mutation Testing Tools
  1. 1Runs onWindows, Mac, Linux
  2. 2CostsNot stated by the maker
  3. 3Supported languagesPython
  4. 4Test frameworkspytest
  5. 5Incremental analysisYes
  6. 6Parallel executionYes
  7. 7Surviving mutant reportsYes
  8. 8Mutation operatorsInteger literals are incremented by 1; < is changed to <=; break and continue are swapped
7 lines stated Written from the maker's own pages: mutmut.readthedocs.io
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Overview

mutmut is ranked #12 of 25 in mutation testing tools on Specifiction. It runs on Windows, macOS, Linux.

Compared on mutation testing tools

Supported languages
Pythonmutmut.readthedocs.io
Test frameworks
pytestmutmut.readthedocs.io
Incremental analysis
Yesmutmut.readthedocs.io
Parallel execution
Yesmutmut.readthedocs.io
Surviving mutant reports
Yesmutmut.readthedocs.io
Mutation operators
Integer literals are incremented by 1; < is changed to <=; break and continue are swappedmutmut.readthedocs.io

Best mutmut alternatives

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All accessCh 01 ArcMutate Free planFree trialLinux from $8/mo7.7 All accessCh 02 Infection LinuxMac 7.1 All accessCh 03 Mutant Free planLinuxMac from $20.83/mo7.1 All accessCh 04 Mutatest Free planLinuxMac Free to start7.1 All accessCh 05 PIT LinuxMac 6.9 All accessCh 06 muttest LinuxMac 6.8

Where it ranks on Specifiction

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