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Head-to-head · Test Coverage Tools

OpenClover vs SimpleCov

  • Updated Sep 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score OpenClover #4 in Test Coverage Tools 7.4/10 Free plan Free plan✓ 2 of 4 features Visit OpenClover
SimpleCov #7 in Test Coverage Tools 6.8/10 Free plan Free plan✓ 2 of 4 features Visit SimpleCov

OpenClover leads on 0 checks, SimpleCov on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreOpenClover · 7.4/10
  • Free planboth

OpenClover scores higher on our rubric for test coverage tools: 7.4 against 6.8 out of 10; our editors rank them #4 and #7.

OpenClover is the better fit for java teams wanting history and test optimization. SimpleCov is the better fit for ruby teams needing advanced coverage gates.

  • OpenClover fits best

    Java teams wanting history and test optimization

  • SimpleCov fits best

    Ruby teams needing advanced coverage gates

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Side by side

Feature OpenClover 7.4/10 Visit ↗ SimpleCov 6.8/10 Visit ↗
At a glance
Editor score 7.4 6.8
Ranking #4 in Test Coverage Tools #7 in Test Coverage Tools
Best for Java teams wanting history and test optimization Ruby teams needing advanced coverage gates
Pricing model Free Free
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Deployment Desktop Cloud, Desktop
Platforms Windows, macOS, Linux Web, Windows, macOS, Linux
Support Community, Docs Docs, Community
Integrations 14 integrations 4 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features OpenClover 2/4 · SimpleCov 2/4
Pull-request annotations Not published Not published
Self-hosted option Not published Not published
Historical trends ✓ ✓
Coverage gates ✓ ✓
Specs
Coverage types method, statement, branch, global, per-test line, branch, method, oneshot-line, eval
Supported languages Java, Groovy, AspectJ Ruby
Report formats HTML, XML, PDF, JSON, TEXT HTML, JSON
Our review
Pros
  • Method, statement, branch, global and per-test coverage metrics
  • Historical reports, data merging and filtering across coverage results
  • Ant, Maven, Gradle, CI, IDE and test-framework integrations
  • Supports line, branch, method, oneshot-line, and eval coverage
  • Merges coverage across test suites and parallel workers
  • Adds thresholds, ratchets, history, and patch coverage analysis
Cons
  • Language support is limited to Java, Groovy and AspectJ
  • The feature set is focused on source-code coverage rather than broad testing
  • Its project structure is an informal, unincorporated group
  • Supports Ruby rather than multiple programming languages
  • Provides HTML and JSON report formatters
  • Is a library, not a vendor-hosted SaaS product
Our verdict

OpenClover is an open-source code coverage tool for Java, Groovy and AspectJ projects. It instruments source code, measures global and per-test coverage, and reports method, statement and branch metrics. Java teams that need coverage…

Read the review →

SimpleCov is an open-source code coverage analysis library for Ruby applications. It suits Ruby teams that need more than a basic line-coverage percentage, including projects using RSpec, Minitest, Rails, or Cucumber. The library uses…

Read the review →
  1. OpenCloverTest Coverage Tools 7.4Free plan
  2. SimpleCovTest Coverage Tools 6.8Free plan

Strengths and trade-offs

  • OpenClover — where it wins

    • Method, statement, branch, global and per-test coverage metrics
    • Historical reports, data merging and filtering across coverage results
    • Ant, Maven, Gradle, CI, IDE and test-framework integrations

    Where it doesn't

    • Language support is limited to Java, Groovy and AspectJ
    • The feature set is focused on source-code coverage rather than broad testing
    • Its project structure is an informal, unincorporated group

  • SimpleCov — where it wins

    • Supports line, branch, method, oneshot-line, and eval coverage
    • Merges coverage across test suites and parallel workers
    • Adds thresholds, ratchets, history, and patch coverage analysis

    Where it doesn't

    • Supports Ruby rather than multiple programming languages
    • Provides HTML and JSON report formatters
    • Is a library, not a vendor-hosted SaaS product

More comparisons

All test coverage tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update