OpenClover

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Score7.1

Rank#2 of 26

PriceFree

Free planYes

Runs onLinux, macOS, Web, Windows

Summary

OpenClover is a free, open-source code coverage tool for Java, Groovy, and AspectJ. It measures coverage globally, per test, or across distributed tests, using method, statement, and branch metrics. Developers can use more than 20 built-in code metrics or add custom ones. Reports are available in HTML, XML, PDF, JSON, and text formats, and coverage scope can be narrowed using paths, classes, methods, code blocks, statements, complexity, and inline comments. For test optimization, it can identify tests to rerun for modified classes, run failing tests first, or randomize test order. Integrations include build tools, CI systems, IDEs, and issue trackers such as Ant, Maven, Gradle, Jenkins, Eclipse, IntelliJ IDEA, Sonar, and JIRA. Dedicated test support covers JUnit 3 and 4, TestNG, and Spock. Version 5.1.x supports JRE or JDK 8 through 25 and Groovy 3.x, 4.x, and 5.x. The software is Apache 2.0 licensed and free forever, with no license tiers, keys, or usage limits.

Who it is for

OpenClover suits developers working with Java, Groovy, or AspectJ who want coverage metrics and test rerun selection. Teams using its Eclipse or IntelliJ IDEA integrations should note that Groovy is not supported there.

What is good

Tracks global, per-test, and distributed per-test coverage
Offers more than 20 built-in code metrics
Generates HTML, XML, PDF, JSON, and text reports
Free forever with no usage limits

What to know first

Groovy is unsupported in Eclipse and IntelliJ IDEA integrations
Community support typically responds within a few days

Verdict

OpenClover combines detailed coverage reporting with test-selection features and integrations across build, CI, IDE, and issue-tracking tools. Its free license has no usage limits, though Groovy has an IDE integration limitation.

OpenClover plans and pricing

All plans

OpenClover Free forever no license tiers · no license keys · no usage limits openclover.org · 1 Oct 2026

Compared on test coverage tools

Free plan: Yesopenclover.org
Coverage types: method, statement, branch, global, per-testopenclover.org
Supported languages: Java, Groovy, AspectJopenclover.org
Report formats: HTML, XML, PDF, JSON, TEXTopenclover.org
Historical trends: Yesopenclover.org
Coverage gates: Yesopenclover.org

Facts

Purpose: OpenClover is a code coverage tool for Java, Groovy and AspectJ.openclover.org · 1 Oct 2026
Code metrics: It includes over 20 built-in code metrics and supports custom metrics.openclover.org · 1 Oct 2026
Integrations: Integrations include Ant, Maven, Gradle, Grails, Griffon, Jenkins, Bamboo, Eclipse, IntelliJ IDEA, Sonar and JIRA.openclover.org · 1 Oct 2026
Test frameworks: Dedicated test support covers JUnit 3 and 4, TestNG and Spock.openclover.org · 1 Oct 2026
Test optimization: It identifies tests to rerun for modified classes and can run failing tests first or randomize test order.openclover.org · 1 Oct 2026
Data filtering: Coverage scope can be filtered by paths, classes, methods, code blocks, statements, complexity and inline comments.openclover.org · 1 Oct 2026
Supported operating systems: Supported operating systems are Microsoft Windows, Linux and Apple Mac OS X.openclover.org · 1 Oct 2026
Runtime support: OpenClover 5.1.x supports JRE or JDK 8 through 25 and Groovy 3.x, 4.x and 5.x.openclover.org · 1 Oct 2026
IDE limitation: Groovy is not supported in the Eclipse and IntelliJ IDEA integrations.openclover.org · 1 Oct 2026
License: OpenClover software is licensed under Apache 2.0.openclover.org · 1 Oct 2026
Technical support: Community support typically responds within a few days through documentation, forums and the issue tracker.openclover.org · 1 Oct 2026
Project status: OpenClover is maintained by volunteers and has been free and open-source since 2017.openclover.org · 1 Oct 2026