Coveralls vs Percy
Coveralls and Percy are both popular tools in the Code Review & Testing space. Both use a freemium pricing model, with Coveralls starting at Free and Percy at Free. Both offer a free tier to get started. Below we break down features, pricing, strengths, and weaknesses to help you decide which tool fits your workflow best.
Last updated: March 2026
Quick Verdict
Choose Coveralls if you want track code coverage over time and ensure test quality in every pr.. Coveralls's biggest strengths include simple setup with most ci providers and free for open-source projects. Choose Percy if you prefer automated visual testing to catch ui regressions in every pr.. Key advantages include catches visual regressions that unit tests miss and excellent cross-browser testing coverage. It's also rated higher (4.2 vs 3.9).
Track code coverage over time and ensure test quality in every PR.
Automated visual testing to catch UI regressions in every PR.
| Coveralls | Percy | |
|---|---|---|
| Pricing | Free | Free |
| Free Tier | Yes | Yes |
| Pricing Model | Freemium | Freemium |
| Rating | ★ 3.9 | ★ 4.2 |
| Categories | Code Review & Testing | Code Review & Testing |
| Key Features | 6 features | 6 features |
| Feature | Coveralls | Percy |
|---|---|---|
| Code coverage tracking and trend analysis | ✓ | — |
| Pull request coverage reporting | ✓ | — |
| Coverage threshold enforcement | ✓ | — |
| Support for all major languages and CI services | ✓ | — |
| Historical coverage data and charts | ✓ | — |
| Badge generation for repository READMEs | ✓ | — |
| Automated visual regression testing | — | ✓ |
| Cross-browser screenshot comparison | — | ✓ |
| Responsive design testing across screen sizes | — | ✓ |
| GitHub and GitLab PR integration | — | ✓ |
| Approval workflows for visual changes | — | ✓ |
| Integration with Cypress, Playwright, and Storybook | — | ✓ |
Coveralls
Pros
- + Simple setup with most CI providers
- + Free for open-source projects
- + Clean interface for tracking coverage trends
- + Good GitHub integration with PR checks
Cons
- − Less feature-rich than Codecov
- − UI feels dated compared to newer alternatives
- − Limited analytics on paid tiers
Percy
Pros
- + Catches visual regressions that unit tests miss
- + Excellent cross-browser testing coverage
- + Good integration with popular testing frameworks
- + Approval workflow makes review process clear
Cons
- − Free tier limited to a small number of screenshots
- − Can produce false positives from dynamic content
- − Pricing scales with screenshot volume
The Bottom Line
Choose Coveralls if: you want track code coverage over time and ensure test quality in every pr.. It's completely free to use. Keep in mind: less feature-rich than codecov.
Choose Percy if: you prefer automated visual testing to catch ui regressions in every pr.. It's completely free to use. It holds a higher user rating (4.2 vs 3.9). Keep in mind: free tier limited to a small number of screenshots.
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