Best Test Coverage Tools in 2026
Updated
In short: OpenClover is ranked #1 of 26 as of 4 October 2026, ahead of SimpleCov and Coverage.py. The best-ranked option with a free plan is SimpleCov. The lowest first paid tier on this page is Codecov at $5/mo.
Test coverage tools help you examine which parts of a codebase are exercised by tests and how coverage changes. Compare supported languages and coverage types, then consider coverage gates, historical trends and pull-request annotations. Report formats and self-hosted options can matter when deciding how coverage information fits your development workflow. Free plans and paid-from pricing provide additional comparison points. Codecov and Coveralls head the ranking, with ReportGenerator and OpenClover next among the opening entries. Follow the listed order as you assess which reporting and review features are relevant to your repository.
26 test coverage tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
9 of the 25 here have a free tier you can use, 0 have open-source code on record, and 0 have full bars: free, open, on most of your devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | OpenCloverWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | Free | 6.6 | |
| 2 | SimpleCovWeb · Windows · Mac · Linux | Three bars | — | 4 of 6 | Free | 6.6 | |
| 3 | Coverage.pyWindows · Mac · Linux · Self-hosted · API | Three bars | — | 3 of 6 | Free | 6.5 | |
| 4 | CoverallsWeb · Linux · Self-hosted · API | Two bars | — | 2 of 6 | $10/mo | 6.5 | |
| 5 | CoverletWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.5 | |
| 6 | gofmtWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.5 | |
| 7 | ReportGeneratorWindows · Mac · Linux | Three bars | — | 3 of 6 | Free | 6.5 | |
| 8 | CodecovWeb · Self-hosted · API · Extension | Two bars | — | 1 of 6 | $5/mo | 6.4 | |
| 9 | gcovrWindows · Mac · Linux | Two bars | — | — | 3 of 6 | — | 5.6 |
| 10 | TarpaulinWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.4 |
| 11 | cargo-llvm-covWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 12 | EclEmmaWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 13 | gcovWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 14 | LLVM llvm-covWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 15 | Microsoft Code CoverageWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 5.3 |
| 16 | LCOVLinux | No signal | — | — | 1 of 6 | — | 5.2 |
| 17 | MozJPEGAPI | One bar | — | — | 0 of 6 | — | 5.2 |
| 18 | c8No platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 19 | IstanbulNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 20 | JaCoCoAPI | One bar | — | 0 of 6 | Free | 5.1 | |
| 21 | KoverNo platforms listed | No signal | — | — | 0 of 6 | — | 5.1 |
| 22 | PHP_CodeCoverageNo platforms listed | No signal | — | — | 0 of 6 | — | 5.0 |
| 23 | BullseyeCoverageWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 4.9 |
| 24 | dotCoverWindows · Mac · Linux | One bar | — | — | 3 of 6 | — | 4.9 |
| 25 | Testwell CTC++Windows · Mac · Linux | One bar | — | — | 3 of 6 | — | 4.9 |
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which test coverage tool is ranked first on Freedom251?
OpenClover is ranked #1 of 26 with a score of 6.6. SimpleCov is second and Coverage.py third.
How many of these have a free plan?
9 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Codecov has the lowest first paid tier we found: $5/mo.
How is this list ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation. Paid placements never change a rank.