Chromatic vs Percy
Side-by-side comparison of features, pricing, ratings, and alternatives.
Chromatic is a cloud platform for visual, interaction, and accessibility testing of UI components, built and maintained by the team behind Storybook. It captures snapshots across real browsers (Chrome, Safari, Firefox, Edge) to catch visual regressions before they ship, and layers in comment-based review workflows tied to pull requests. Beyond testing, Chromatic offers a Publish feature that turns a team's component library into a searchable, auto-updating catalog. It integrates with Storybook, Playwright, and Cypress test suites without requiring additional test authoring, and is used by teams at GitHub, Vercel, Adobe, and the BBC.
Percy is a visual testing platform, now part of BrowserStack, that captures screenshots of a web application across browsers and screen sizes on every commit, then compares them against an approved baseline to flag unintended visual changes. It plugs into existing test frameworks like Playwright, Selenium, and Storybook so teams add visual coverage without rewriting their test suite. An AI-powered Visual Review Agent prioritizes which changes actually matter and summarizes them in plain language, aiming to cut review time and alert fatigue from minor, harmless pixel differences. Dynamic content filtering, root-cause analysis (DOM vs CSS vs layout), and a real device cloud round out the platform for teams scaling visual test coverage.
- Deep, native Storybook integration
- Covers visual, interaction, and a11y testing in one tool
- Strong PR-based review workflow
- Used by well-known engineering teams
- Catches layout and styling bugs that functional tests typically miss
- AI review agent reduces time spent triaging noisy screenshot diffs
- Broad integration list including Playwright, Selenium, and Storybook
- Usable free tier for smaller projects
- Snapshot-based pricing can get costly at scale
- Extra billed snapshots incur per-unit charges
- Most value requires an existing Storybook setup
- Now bundled under BrowserStack's broader pricing and product suite, adding complexity
- Visual testing still requires initial baseline setup and periodic maintenance
- Full paid pricing tiers are not transparently listed on the public page
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The Verdict
AI-generated from listing dataPercy is the safer default for general visual regression across browsers, while Chromatic adds interaction and accessibility testing but shines when you already use Storybook.
Key differences
- •Percy focuses on pure visual regression across many browsers and devices; Chromatic adds interaction and WCAG accessibility scans.
- •Chromatic’s deep native Storybook integration enables component‑driven review and PR workflows; Percy works with any test framework.
- •Pricing transparency: Percy’s paid tiers aren’t listed, whereas Chromatic charges per snapshot, which can become expensive at scale.
- •Collaboration: Chromatic provides comment‑based UI reviews and automatic reviewer assignment; Percy relies on an AI review agent for triage.
- •Device coverage: Percy includes a real‑device cloud for iOS/Android testing; Chromatic tests only on desktop browsers.
Pricing & value
Both offer freemium, but Chromatic adds per‑snapshot charges that can grow costly; Percy’s paid tiers are undisclosed but free tier is usable.
Ease of use / learning curve
Percy needs baseline screenshot setup; Chromatic requires an existing Storybook setup—each eases adoption for its target audience.
Features & depth
Chromatic combines visual regression, interaction testing, and accessibility scans; Percy provides visual testing only.
Integrations & ecosystem
Percy lists over 50 integrations (Playwright, Selenium, Cypress, Storybook, CI/CD, device cloud); Chromatic lists fewer, mainly VCS and design tools.
Collaboration
Chromatic offers comment‑based UI review, PR status checks, and auto‑assign reviewers; Percy relies on AI triage without built‑in review UI.
Scalability
Percy supports cross‑browser, cross‑resolution, and real‑device testing; Chromatic’s snapshot‑based pricing can limit large‑scale use.
Choose Chromatic if…
Frontend teams already using Storybook who want visual, interaction, and accessibility testing with built‑in review workflow.
Choose Percy if…
QA or frontend teams needing broad visual regression across browsers/devices without a Storybook prerequisite.
Common questions
How does pricing differ at scale?
Percy’s pricing isn’t publicly detailed; Chromatic charges per snapshot, which can become expensive as test volume grows.
Can I use these tools with my existing test framework?
Percy integrates with Playwright, Selenium, Cypress, and others; Chromatic works with existing Storybook, Playwright, and Cypress suites.
Do I need to adopt Storybook to use Chromatic?
Most value from Chromatic comes from a Storybook setup; without it, you lose its native component‑driven workflow.