Coveralls vs Chromatic
Coveralls and Chromatic are both popular tools in the Code Review & Testing space. Both use a freemium pricing model, with Coveralls starting at Free and Chromatic 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 Chromatic if you prefer visual testing and review platform built for storybook components.. Key advantages include best-in-class integration with storybook and built by the storybook maintainers themselves. It's also rated higher (4.5 vs 3.9).
Track code coverage over time and ensure test quality in every PR.
Visual testing and review platform built for Storybook components.
| Coveralls | Chromatic | |
|---|---|---|
| Pricing | Free | Free |
| Free Tier | Yes | Yes |
| Pricing Model | Freemium | Freemium |
| Rating | ★ 3.9 | ★ 4.5 |
| Categories | Code Review & Testing | Code Review & Testing |
| Key Features | 6 features | 6 features |
| Feature | Coveralls | Chromatic |
|---|---|---|
| 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 | ✓ | — |
| Visual regression testing for Storybook components | — | ✓ |
| Cross-browser snapshot testing | — | ✓ |
| UI review and approval workflow | — | ✓ |
| Storybook publishing and hosting | — | ✓ |
| Interaction testing for component behavior | — | ✓ |
| GitHub and CI/CD integration | — | ✓ |
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
Chromatic
Pros
- + Best-in-class integration with Storybook
- + Built by the Storybook maintainers themselves
- + Generous free tier for open-source projects
- + Excellent collaborative review workflow
Cons
- − Requires Storybook — not useful without it
- − Snapshot volume can drive up costs quickly
- − Limited to component-level testing
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 Chromatic if: you prefer visual testing and review platform built for storybook components.. It's completely free to use. It holds a higher user rating (4.5 vs 3.9). Keep in mind: requires storybook — not useful without it.
Both tools compete in the Code Review & Testing space. The right choice depends on your specific needs, team size, and budget.
Sweep
CodeRabbit
Qodo
Snyk Code
SonarQube
Greptile