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Testing · head to head

Percy vs Storybook

Percy logo

Percy

Testing

Visual regression testing owned by BrowserStack, with a permanent free tier for low screenshot volume

From
Free
Rated
-
Full reviewWebsite
Storybook logo

Storybook

Technology

Build component driven UIs faster

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Percy pixel-based diffing generates more false positives from font rendering and anti-aliasing noise than Applitools' AI-based comparison, which trains some teams to start ignoring diff alerts over time.; Storybook requires JavaScript framework knowledge for full utilization
  • They diverge on capability: Percy covers Screenshot diffing, Storybook covers Component isolation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Percy and Storybook actually diverge.

Attributes where Percy and Storybook differ
AttributePercyStorybook
Pricing modelFreemium, paid tiers by screenshot volumeUnknown
PlatformsWebWeb, React Native, iOS, Android, Flutter
CategoryTestingTechnology
FoundedUnknown2017

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Percy

  • Screenshot diffing
  • Framework integrations
  • Responsive and cross-browser snapshots
  • Review workflow
  • Build history
  • BrowserStack platform integration

Only in Storybook

  • Component isolation
  • Interactive development
  • Visual testing
  • Documentation generation
  • Accessibility testing
  • Interaction testing
  • Addons ecosystem
  • Hot module reloading

What people use each for

The jobs each tool is most often brought in to do.

Percy

  • A team already on BrowserStack for device testing that wants to add visual regression without a separate vendor relationshipnot Storybook
  • A low-traffic project that can run indefinitely on the 5,000-screenshot free tier without paying anythingnot Storybook
  • A team wanting a lower cost per screenshot than Applitools and willing to tolerate more manual false-positive triagenot Storybook
  • A Cypress or Playwright test suite adding visual checks without changing its existing test runnernot Storybook

Storybook

  • Component developmentnot Percy
  • Design system documentationnot Percy
  • Visual regression testingnot Percy
  • UI component showcasenot Percy
  • Team collaborationnot Percy

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Percy

  • Pixel-based diffing generates more false positives from font rendering and anti-aliasing noise than Applitools' AI-based comparison, which trains some teams to start ignoring diff alerts over time.
  • It is billed separately from core BrowserStack device testing, and stacking Percy with other BrowserStack modules such as Accessibility Testing materially increases total contract value beyond the headline device testing price.
  • Paid tier pricing above the free tier is not transparently published as a fixed number, requiring a quote to know actual cost at scale.
  • The free tier's 5,000-screenshot cap is easy to exceed for any team running visual tests across multiple browsers and viewports on every commit, pushing many active projects into a paid tier faster than the free number suggests.
  • As part of a larger acquired portfolio, Percy's roadmap priority within BrowserStack's broader product strategy is less certain than it would be as a standalone company's sole focus.

Storybook

  • Requires JavaScript framework knowledge for full utilization
  • Limited native support for non-web platforms compared to specialized tools

Pricing, plan by plan

Percy

Free
  • FreeFree
    • 5,000 screenshots a month
    • Unlimited users and projects
    • 30-day build history
  • Percy$undefined/month
    • Priced by screenshot volume above the free tier
    • Sold separately from core BrowserStack device testing plans
    • Get a current quote before assuming bundled pricing with other BrowserStack products

Storybook

Free

No published plan breakdown. See the Storybook review.

Which should you pick?

Choose Percy if

  • You need screenshot diffing.
  • You want to start without paying.
  • You also want framework integrations.
Percy review

Choose Storybook if

  • You need component isolation.
  • You want to start without paying.
  • You work on Web, React Native, iOS, Android, Flutter.
  • You also want interactive development.
Storybook review

Questions people ask

Is Percy or Storybook better?
Neither clearly leads. Percy starts at Free and Storybook at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Percy or Storybook?
Percy starts at Free and Storybook at Free.
Does Percy or Storybook run on more platforms?
Percy runs on Web. Storybook runs on Web, React Native, iOS, Android, Flutter.
Can I use Percy for free?
Both have a free tier, so you can try either at no cost before committing.
What is Percy best used for?
Percy is most often used for a team already on browserstack for device testing that wants to add visual regression without a separate vendor relationship, a low-traffic project that can run indefinitely on the 5,000-screenshot free tier without paying anything, a team wanting a lower cost per screenshot than applitools and willing to tolerate more manual false-positive triage, a cypress or playwright test suite adding visual checks without changing its existing test runner. Of those, a team already on browserstack for device testing that wants to add visual regression without a separate vendor relationship and a low-traffic project that can run indefinitely on the 5,000-screenshot free tier without paying anything are not what Storybook is typically brought in for.
What can Percy do that Storybook cannot?
Percy covers Screenshot diffing, Framework integrations, Responsive and cross-browser snapshots, Review workflow. Storybook covers Component isolation, Interactive development, Visual testing, Documentation generation.

Answered from the vendors’ own pages

Percy: Is Percy free?

Yes for up to 5,000 screenshots a month with unlimited users and projects; beyond that it is a paid, quote-priced module.

Storybook: Is Storybook free and open source?

Yes, Storybook is completely free and open source with source code hosted on GitHub. It has 2,282 contributors and approximately 83.58 million monthly installations.

Source
Percy: Is Percy included if I already pay for BrowserStack device testing?

No, it is billed separately by screenshot volume, not bundled into core device testing plans.

Storybook: What frameworks does Storybook support?

Storybook integrates with React, Vue, Angular, Svelte, and has been extended to support React Native, Android, iOS, and Flutter for mobile development.

Source
Percy: How does it compare to Applitools?

Percy uses pixel-based diffing, which is generally cheaper per screenshot but produces more false positives than Applitools' AI-based perceptual comparison.

Storybook: What are the main capabilities of Storybook?

Storybook enables component development in isolation, interaction testing, visual testing, documentation, and sharing components with designers and stakeholders.

Source
Storybook: How is Storybook maintained?

Storybook is maintained by a community of 2,282 contributors. It originated from a startup called Kadira, was handed to the community in 2017, and has been community-driven since Storybook 3.0.

Source
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