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Head-to-head · Test Coverage Tools

JaCoCo vs SimpleCov

  • Updated Sep 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score JaCoCo #5 in Test Coverage Tools 7.1/10 Free plan Free plan✓ 1 of 4 features Visit JaCoCo
SimpleCov #7 in Test Coverage Tools 6.8/10 Free plan Free plan✓ 2 of 4 features Visit SimpleCov

JaCoCo leads on 0 checks, SimpleCov on 1, and 2 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 scoreJaCoCo · 7.1/10
  • Free planboth
  • Most featuresSimpleCov · 2 of 4

JaCoCo scores higher on our rubric for test coverage tools: 7.1 against 6.8 out of 10; our editors rank them #5 and #7.

SimpleCov offers historical trends; JaCoCo doesn't publish it.

JaCoCo is the better fit for java builds using Maven or Ant. SimpleCov is the better fit for ruby teams needing advanced coverage gates.

  • JaCoCo fits best

    Java builds using Maven or Ant

  • SimpleCov fits best

    Ruby teams needing advanced coverage gates

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes our verdict. How we rank.

Side by side

Feature JaCoCo 7.1/10 Visit ↗ SimpleCov 6.8/10 Visit ↗
At a glance
Editor score 7.1 6.8
Ranking #5 in Test Coverage Tools #7 in Test Coverage Tools
Best for Java builds using Maven or Ant Ruby teams needing advanced coverage gates
Pricing model Free Free
Starting price Not published Not published
Free plan ✓ ✓
Free trial — —
Deployment Self-hosted Cloud, Desktop
Support Community, Docs Docs, Community
Integrations 4 integrations 4 integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features JaCoCo 1/4 · SimpleCov 2/4
Pull-request annotations Not published Not published
Self-hosted option Not published Not published
Historical trends Not published ✓ (best)
Coverage gates ✓ ✓
Specs
Coverage types instruction, branch, complexity, line, method, class line, branch, method, oneshot-line, eval
Supported languages Java, Kotlin, Groovy, Scala Ruby
Report formats HTML, XML, CSV HTML, JSON
Our review
Pros
  • Supports instruction, branch, complexity, line, method, and class counters
  • Generates HTML, XML, and CSV reports
  • Coverage thresholds can halt builds when requirements are missed
  • 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
  • Self-hosted rather than a hosted coverage dashboard
  • Coverage collection requires instrumentation through an agent or offline mode
  • Build integration is centered on Maven, Ant, and command-line workflows
  • Supports Ruby rather than multiple programming languages
  • Provides HTML and JSON report formatters
  • Is a library, not a vendor-hosted SaaS product
Our verdict

JaCoCo is a free, open-source code coverage library for Java and JVM projects. It is designed for developers who want coverage collection and reporting inside local or continuous-integration build processes, particularly teams working with…

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. JaCoCoTest Coverage Tools 7.1Free plan
  2. SimpleCovTest Coverage Tools 6.8Free plan

Strengths and trade-offs

  • JaCoCo — where it wins

    • Supports instruction, branch, complexity, line, method, and class counters
    • Generates HTML, XML, and CSV reports
    • Coverage thresholds can halt builds when requirements are missed

    Where it doesn't

    • Self-hosted rather than a hosted coverage dashboard
    • Coverage collection requires instrumentation through an agent or offline mode
    • Build integration is centered on Maven, Ant, and command-line workflows

  • 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