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Head-to-head · Test Coverage Tools

Coveralls vs Coverlet

  • Updated Sep 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score Coveralls #2 in Test Coverage Tools 9.2/10 Free plan · paid from $10/mo · 30-day trial Free plan✓ 4 of 4 features Visit Coveralls
Coverlet #8 in Test Coverage Tools 6.5/10 Free plan Free plan✓ 1 of 4 features Visit Coverlet

Coveralls leads on 3 checks, Coverlet on 0, and 2 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreCoveralls · 9.2/10
  • Free planboth
  • Most featuresCoveralls · 4 of 4

Coveralls scores higher on our rubric for test coverage tools: 9.2 against 6.5 out of 10; our editors rank them #2 and #8.

Coveralls offers pull-request annotations; Coverlet doesn't publish it. Coveralls offers self-hosted option; Coverlet doesn't publish it. Coveralls offers historical trends; Coverlet doesn't publish it.

Coveralls is the better fit for mature multi-language coverage reporting. Coverlet is the better fit for .NET developers needing build-integrated coverage.

  • Coveralls fits best

    Mature multi-language coverage reporting

  • Coverlet fits best

    .NET developers needing build-integrated coverage

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 Coveralls 9.2/10 Visit ↗ Coverlet 6.5/10 Visit ↗
At a glance
Editor score 9.2 6.5
Ranking #2 in Test Coverage Tools #8 in Test Coverage Tools
Best for Mature multi-language coverage reporting .NET developers needing build-integrated coverage
Pricing model Free plan + paid Free
Starting price $10/mo Not published
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Self-hosted
Platforms Web Windows, macOS, Linux
Support Email, Live chat, Community, Docs Community, Docs
Integrations 30+ integrations 4 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Coveralls 4/4 · Coverlet 1/4
Pull-request annotations ✓ (best) Not published
Self-hosted option ✓ (best) Not published
Historical trends ✓ (best) Not published
Coverage gates ✓ ✓
Specs
Coverage types line, branch line, branch, method
Supported languages .NET, C/C++, D, Elixir, Erlang, FORTRAN, Go, Haskell, Java, JavaScript, Julia, Kotlin, Lisp, Lua, OCaml, Objective-C, PHP, Python, R, Ruby, Scala, Smalltalk, Swift Not published
Report formats LCOV, SimpleCov, Cobertura, JaCoCo, Gcov, LuaCov, Golang, Coveralls JSON, Pytest-Cov, Clover XML json, lcov, opencover, cobertura, teamcity
Our review
Pros
  • Repository, file, and line-level coverage statistics with history
  • Pull-request comments, thresholds, and commit status updates
  • Broad CI, language, notification, API, and self-hosted support
  • Measures line, branch, and method coverage
  • Integrates with Microsoft Testing Platform, VSTest, and MSBuild
  • Supports filtering, merging, thresholds, and five report formats
Cons
  • Private repositories require a paid plan
  • Language integrations are community-created unless otherwise noted
  • Higher tiers are needed for larger private-repository portfolios
  • Primarily focused on .NET projects
  • Requires tests to run before coverage results are written
  • Uses packages and tooling rather than a hosted subscription
Our verdict

Coveralls is a web-based code coverage service for software teams and open-source projects. It receives coverage reports from continuous-integration workflows, stores build history, and presents repository, file, and line-level statistics.…

Read the review →

Coverlet is an open-source, cross-platform code-coverage framework for modern SDK-style .NET projects. It is designed for .NET developers and teams running automated tests locally or in continuous-integration environments. Coverlet…

Read the review →
  1. CoverallsTest Coverage Tools 9.2Free plan · paid from $10/mo · 30-day trial
  2. CoverletTest Coverage Tools 6.5Free plan

Strengths and trade-offs

  • Coveralls — where it wins

    • Repository, file, and line-level coverage statistics with history
    • Pull-request comments, thresholds, and commit status updates
    • Broad CI, language, notification, API, and self-hosted support

    Where it doesn't

    • Private repositories require a paid plan
    • Language integrations are community-created unless otherwise noted
    • Higher tiers are needed for larger private-repository portfolios

  • Coverlet — where it wins

    • Measures line, branch, and method coverage
    • Integrates with Microsoft Testing Platform, VSTest, and MSBuild
    • Supports filtering, merging, thresholds, and five report formats

    Where it doesn't

    • Primarily focused on .NET projects
    • Requires tests to run before coverage results are written
    • Uses packages and tooling rather than a hosted subscription
  • Coveralls9.2/10 · Free plan · paid from $10/mo · 30-day trial

    A mature coverage service for multi-language teams needing CI and pull-request visibility.

    Visit CoverallsFull verdict →
  • Coverlet6.5/10 · Free plan

    A free, open-source coverage framework for build-integrated .NET testing.

    Visit CoverletFull verdict →

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