Istanbul

c8

bcoe/c8

Native V8 code coverage for Node.js with Istanbul-compatible reports, no instrumentation needed.

coverage.py

coveragepy/coveragepy

Popular

The standard code coverage measurement tool for Python, used under pytest-cov.

JaCoCo

jacoco/jacoco

Popular

Free Java code coverage library with Maven/Gradle plugins; the JVM coverage standard.

Coverlet

coverlet-coverage/coverlet

Cross-platform code coverage framework for .NET, integrated with dotnet test.

Codecov

about.codecov.io

Popular

Sentry-owned coverage reporting service that comments coverage diffs on PRs and enforces thresholds.

Coveralls

coveralls.io

Hosted coverage history and PR status checks, long popular with open-source projects.

SonarQube

SonarSource/sonarqube

Popular

Code quality and security platform with quality gates on coverage, bugs, smells and vulnerabilities.

Allure Report

allure-framework/allure2

Framework-agnostic test reporting that turns results from dozens of runners into rich HTML reports.

ReportPortal

reportportal/reportportal

Self-hosted test results dashboard with ML-assisted failure triage and historical analytics.