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Head-to-head · Mutation Testing Tools

ArcMutate vs Mutant

  • Updated Sep 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score ArcMutate #1 in Mutation Testing Tools 9.8/10 Free plan · paid from $8/user/mo Free plan✓ 4 of 4 features Visit ArcMutate
Mutant #8 in Mutation Testing Tools 6.7/10 Free plan · paid from $30/mo Free plan✓ 3 of 4 features Visit Mutant

ArcMutate leads on 1 check, Mutant on 0, and 4 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreArcMutate · 9.8/10
  • Free planboth
  • Most featuresArcMutate · 4 of 4

ArcMutate scores higher on our rubric for mutation testing tools: 9.8 against 6.7 out of 10; our editors rank them #1 and #8.

ArcMutate offers mutation quality gate; Mutant doesn't publish it.

ArcMutate is the better fit for java teams needing broad CI mutation testing. Mutant is the better fit for ruby teams with Rails applications.

  • ArcMutate fits best

    Java teams needing broad CI mutation testing

  • Mutant fits best

    Ruby teams with Rails applications

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature ArcMutate 9.8/10 Visit ↗ Mutant 6.7/10 Visit ↗
At a glance
Editor score 9.8 6.7
Ranking #1 in Mutation Testing Tools #8 in Mutation Testing Tools
Best for Java teams needing broad CI mutation testing Ruby teams with Rails applications
Pricing model Free plan + paid Free plan + paid
Starting price Not published $30/mo
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Self-hosted
Platforms Linux, Windows, macOS Linux, macOS
Support Email, Community, Docs Email, Community, Docs
Integrations 10 integrations 5 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features ArcMutate 4/4 · Mutant 3/4
Incremental analysis ✓ ✓
Parallel execution ✓ ✓
Surviving mutant reports ✓ ✓
Mutation quality gate ✓ (best) Not published
Specs
Supported languages Java, Kotlin, Groovy Ruby
Test frameworks JUnit 4, JUnit 5, Spring Test, Mockito, MockK, Robolectric RSpec, Minitest, Test::Unit
Mutation operators Extended, extreme, chained calls, varargs, one-less-parameter, remove distinct/filter/limit/skip/sorted, predicate operators, field writes, parameter swaps, stream match swaps, reactive return and mapping operators, Groovy boundary and conditional operators, Spring annotation operators Arithmetic, logical, bitwise, statement removal, return-value modification, ordering
Our review
Pros
  • Extended and extreme mutation operators with subsumption analysis
  • Pull-request workflows with surviving-mutant annotations
  • Java, Kotlin and Groovy support across four platforms
  • Supports RSpec, Minitest, Test::Unit, Rails, and SimpleCov
  • Incremental analysis and parallel workers help target larger test suites
  • Reports surviving mutants with session history and report recall
Cons
  • Android and Robolectric support is still in beta
  • The Base plan does not include Git or CI platform integrations
  • Teams outside JVM development will need another tool
  • Commercial access starts at $30 per developer per month
  • Supports Ruby rather than multiple programming languages
  • Runs on Linux and macOS only
Our verdict

ArcMutate is mutation testing software from CloudDev for JVM development teams that want to identify weaknesses in automated test suites. It extends PIT mutation testing with support for Java, Kotlin and Groovy, while Android support is…

Read the review →

Mutant is a mutation-testing tool for Ruby applications and libraries. It modifies Ruby source code, runs selected tests, and reports mutations that survive. The product is aimed at Ruby teams that want to assess whether their test suites…

Read the review →
  1. ArcMutateMutation Testing Tools 9.8Free plan · paid from $8/user/mo
  2. MutantMutation Testing Tools 6.7Free plan · paid from $30/mo

Strengths and trade-offs

  • ArcMutate — where it wins

    • Extended and extreme mutation operators with subsumption analysis
    • Pull-request workflows with surviving-mutant annotations
    • Java, Kotlin and Groovy support across four platforms

    Where it doesn't

    • Android and Robolectric support is still in beta
    • The Base plan does not include Git or CI platform integrations
    • Teams outside JVM development will need another tool

  • Mutant — where it wins

    • Supports RSpec, Minitest, Test::Unit, Rails, and SimpleCov
    • Incremental analysis and parallel workers help target larger test suites
    • Reports surviving mutants with session history and report recall

    Where it doesn't

    • Commercial access starts at $30 per developer per month
    • Supports Ruby rather than multiple programming languages
    • Runs on Linux and macOS only
  • ArcMutate9.8/10 · Free plan · paid from $8/user/mo

    A broad JVM mutation testing suite with CI workflows, quality gates and a free plan.

    Visit ArcMutateFull verdict →
  • Mutant6.7/10 · Free plan · paid from $30/mo

    A focused Ruby mutation-testing tool with strong Rails and test-framework coverage.

    Visit MutantFull verdict →

More comparisons

All mutation testing tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update