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Coverlet

C
C tier on Test Coverage ToolsScore 6.9 · #8 of 26
Android app
Not listed
Free plan
Yes
Runs on
Linux, Mac, Windows
github.com
The Coverlet homepage
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Summary

Coverlet is a free, cross-platform code coverage framework for .NET that reports line, branch and method coverage. Before tests run, it instruments assemblies, records sequence point hits, restores the original assemblies and writes coverage results. Integrations are available for Microsoft Testing Platform, the .NET global tool, VSTest and MSBuild. The Microsoft Testing Platform driver supports JSON, LCOV, OpenCover and Cobertura reports. Depending on the driver, options include merging reports, validating coverage thresholds and deterministic build support. The collector and MSBuild packages use VSTest and are incompatible with Microsoft Testing Platform projects; the project provides coverlet.MTP for those projects. Coverlet supports modern SDK-style projects, and its MTP package requires .NET 8.0 SDK or newer. The project also lists a Cake.Coverlet add-in for Cake Build and extensions for viewing coverage in Visual Studio on Windows and Visual Studio for Mac. Coverlet is licensed under MIT, and bug reports and feature requests are directed to the repository’s issues section.

Who it is for

Coverlet suits .NET developers who need line, branch or method coverage across supported platforms. Teams using Microsoft Testing Platform should select its MTP package rather than the VSTest-based collector or MSBuild packages.

What is good

  • Free and MIT licensed
  • Reports line, branch and method coverage
  • Supports multiple .NET test integrations
  • MTP driver supports four report formats
  • Can validate coverage thresholds

What to know first

  • Collector and MSBuild packages are incompatible with MTP
  • MTP package requires .NET 8.0 SDK or newer
  • Some features vary by driver

Verdict

Coverlet provides a no-cost coverage workflow with several integration and report options. Choose the driver carefully, especially if your project uses Microsoft Testing Platform.

Coverlet plans and pricing

All plans
Coverlet Free MIT licensed · supports modern .NET SDK-style projects github.com · 3 Oct 2026

Compared on test coverage tools

Free plan
Yesgithub.com
Coverage types
line, branch, methodgithub.com
Report formats
json, lcov, opencover, cobertura, teamcitygithub.com
Coverage gates
Yesgithub.com

Facts

Purpose
Coverlet is a cross-platform code coverage framework for .NET with line, branch and method coverage.github.com · 3 Oct 2026
Coverage workflow
It instruments assemblies before tests run, records sequence point hits, restores the original assemblies and writes coverage results.github.com · 3 Oct 2026
Drivers
Coverlet provides Microsoft Testing Platform, .NET global tool, VSTest and MSBuild integrations.github.com · 3 Oct 2026
Feature options
Driver features include report merging, coverage threshold validation and deterministic build support, with availability varying by driver.github.com · 3 Oct 2026
Test platform
The collector and MSBuild packages use VSTest and are incompatible with Microsoft Testing Platform; the project provides coverlet.MTP for MTP projects.github.com · 3 Oct 2026
Requirements
Coverlet supports modern SDK-style projects, and its MTP package requires .NET 8.0 SDK or newer.github.com · 3 Oct 2026
Integrations
The project lists a Cake.Coverlet add-in for Cake Build and extensions for viewing coverage in Visual Studio on Windows and Visual Studio for Mac.github.com · 3 Oct 2026
Support
The project directs users to report bugs and feature requests through the repository’s issues section.github.com · 3 Oct 2026
License
The repository states that Coverlet is licensed under the MIT License.github.com · 3 Oct 2026
Maintainers
The repository lists Toni Solarin-Sodara as author and owner, alongside co-maintainers.github.com · 3 Oct 2026

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