Alternatives to Microsoft Code Coverage

Coverage.py suits Python developers who want to see which code their tests execute and which executable code they miss.

Coveralls

Coveralls suits development teams that want coverage detail at file and line level, plus coverage checks in pull requests.

It is aimed at C and C++ developers and testers, including those working on mission-critical systems and embedded devices.

gcov suits developers using GCC and test suites to find code that tests do not exercise.

It suits Rust developers who want coverage reports in a command-line workflow, including CI pipelines.

EclEmma suits individual developers using Eclipse who want coverage views and reports for Java or Scala work.

ReportGenerator suits developers and teams that need command-line coverage reports across Windows, Linux, or macOS.

It suits .NET teams that need automated line, branch, or method coverage on desktop or server operating systems.

OpenClover suits teams working with Java, Groovy or AspectJ that need coverage metrics and test-selection support.

It suits developers and teams examining coverage from instrumented native-language programs.

Kover suits Kotlin or Java teams targeting JVM and Android that need report generation and enforceable coverage rules.

SimpleCov suits Ruby developers who want coverage reports, test mapping, or thresholds for changed lines.