Chromatic vs Percy: Which Visual Testing Tool to Choose in 2026?
Component Visual Testing: "An automated verification method that captures the visual rendering of isolated UI components in their various states, then compares those captures to references to detect any unintentional change in their appearance."
Chromatic and Percy. Two visual testing tools, two philosophies, two audiences. One was born in the Storybook ecosystem and swears by it. The other aims to be universal and integrates everywhere. Both end up doing the same thing — comparing screenshots — but the path to get there is radically different.
If you searched "chromatic vs percy," it's probably because you use Storybook and you're torn between the in-house solution and the versatile outsider. This article will help you decide. And maybe consider an option that neither one offers.
Chromatic: the native Storybook tool
Chromatic was created by the Storybook maintainers themselves. That's not a trivial detail — it's the foundation of its entire value proposition. When the people who build Storybook also build the visual testing tool for Storybook, the integration is, unsurprisingly, impeccable.
How Chromatic works
The principle is disarmingly simple. You have your Storybook stories — those isolated labs where each component lives in its various states. Chromatic automatically captures each of those stories as an image. Every time code changes, it recaptures and compares. If something has changed visually, it shows you.
No SDK to configure, no tests to write. If you have stories, you have visual tests. It's that direct.
Chromatic's strengths
Total Storybook integration. Chromatic understands your stories, args, decorators, and configured viewports. It treats Storybook as its native language. Excellent review workflow. Each visual change triggers a review in the Chromatic dashboard with side-by-side comparison. Smart change detection. Only affected components are recaptured. Interaction visual testing. Play interactions before capture. Visual documentation. Automatically publishes an online version of your Storybook.
Chromatic's weaknesses
Storybook or nothing. If you don't use Storybook, Chromatic is useless. And even if you do, it only tests what's in Storybook — not your complete pages. Cost scales quickly beyond the free tier. Cloud only. All captures are sent and stored on Chromatic's servers. No full-page testing. Composition bugs between components go undetected.
Percy: the universalist
Percy, owned by BrowserStack since 2020, plays a different game. Where Chromatic is a specialist, Percy is a generalist. It integrates with many frameworks, not just Storybook.
How Percy works
Percy integrates into your existing tests via an SDK. Whether you use Cypress, Playwright, Selenium, or Storybook, you add Percy calls to your scenarios. These calls capture the page state and send it to the Percy cloud for comparison.
Percy's strengths
Universality. Not tied to one framework. Full-page testing. Unlike Chromatic, Percy captures entire pages in their real context. Real multi-browser rendering via BrowserStack. Pull request integration. Results appear as checks in your merge requests. Responsive testing. Multiple viewport sizes per page.
Percy's weaknesses
Pixel-by-pixel comparison leads to higher false positive rates. Inferior Storybook integration compared to Chromatic. Cost with browser/viewport multipliers. Cloud latency on large test suites.
Direct comparison: 6 key dimensions
1. Test scope
Chromatic: isolated components via Storybook. Percy: full pages and components. Advantage: Percy for coverage, Chromatic for component depth.
2. Ease of adoption
If you already have Storybook, Chromatic activates in minutes. Percy requires SDK integration. Advantage: Chromatic with Storybook, Percy otherwise.
3. Detection quality
Chromatic uses smart comparison optimized for Storybook components. Percy uses pixel-by-pixel comparison more prone to false positives. Advantage: Chromatic, moderately.
4. Collaborative workflow
Both offer review dashboards. Chromatic better integrates design review. Percy better integrates development workflow. Advantage: depends on your culture.
5. Multi-browser rendering
Percy uses real browsers via BrowserStack. Chromatic defaults to Chrome. Advantage: Percy, clearly.
6. Total cost
Both charge by usage. Cost depends on your volume. Advantage: variable — do the math with your actual volumes.
The shared blind spot: cloud-only and paid
Here's the essential point: Chromatic and Percy share the same structural limitations.
Both are cloud-only. Your screenshots — images of your application, potentially with sensitive data — leave your infrastructure. In 2026, with GDPR, the NIS2 directive, and growing awareness of digital sovereignty, this is increasingly difficult for organizations to accept.
Both become paid beyond the free tier. The transition from free to paid can be abrupt. The pay-per-use model means your investment in visual quality is directly limited by your budget. More testing = higher cost.
Both require technical skills. Chromatic needs Storybook. Percy needs SDK integration. In both cases, non-technical QA depends on developers.
Both are external dependencies. Your ability to visually test depends on a third-party service's availability.
Delta-QA: the local and free alternative
What if visual testing could be local, free, and accessible to everyone?
That's the proposition of Delta-QA. Not a low-cost version of Chromatic or Percy, but a fundamentally different approach:
Local by default. Your screenshots never leave your machine. Comparison runs locally. No cloud, no data transfer, no external dependency. Your GDPR compliance thanks you.
Free, no asterisk. No free tier with a ticking counter. No "enterprise" tier to unlock features. Delta-QA is free, period. You test 10 pages or 10,000 — same price: zero.
Truly no-code. No Storybook required, no SDK to integrate, no tests to write. You point Delta-QA at your pages, it captures and compares. A junior QA, a designer checking mockups, a product owner validating a sprint — anyone can use it from day one.
Full pages and components. Unlike Chromatic (components only) and like Percy (but without the complexity), Delta-QA tests your pages in their real context.
Complementary, not competing. If you already use Chromatic for Storybook components, Delta-QA can complete your coverage by testing assembled pages. If you use Percy, Delta-QA can serve as a local safety net.
Visual testing is too important to be limited by a budget, a tech stack, or a skill level.
FAQ
Does Chromatic work without Storybook?
No. Chromatic is designed exclusively for Storybook. Percy or Delta-QA are alternatives that work independently of Storybook.
Is Percy better than Chromatic for visual testing?
It depends on your context. If you use Storybook and prioritize component testing, Chromatic offers a superior experience. If you need full-page testing across multiple browsers, Percy is better suited.
How much do Chromatic and Percy cost?
Both offer limited free tiers. Beyond that, billing is usage-based. Costs can rise quickly with many components or pages, especially with Percy's multi-browser multiplier.
Can you use Chromatic and Percy together?
Technically yes. In practice, few teams do so due to cumulative cost and management complexity.
Does Chromatic detect layout bugs between components?
No. Chromatic tests components in isolation. Problems appearing only when components are assembled in a real page are not detected.
Is there a free and local alternative to Chromatic and Percy?
Yes. Delta-QA is a no-code visual testing tool that runs locally. It's free without capture limits, requires no development skills, and transfers no data to a third-party cloud.
How to migrate from Chromatic or Percy to Delta-QA?
Migration is simple since Delta-QA doesn't depend on your existing tests. Start using Delta-QA in parallel, create your first visual references, and evaluate results. Once satisfied, reduce or stop your cloud tool usage.
Your visual testing deserves better than a capture counter. Try the local alternative.