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Testing · head to head

Kameleoon vs Percy

Kameleoon logo

Kameleoon

Testing

A/B testing and feature experimentation with a hybrid client and server-side engine

From
On request
Rated
-
Full reviewWebsite
Percy logo

Percy

Testing

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Percy has a free tier, so it costs nothing to try first.
  • Each has a real cost: Kameleoon no rate card is published. Reported entry pricing around several hundred euros a month for the limited prompt-based tier comes from third parties rather than Kameleoon, so any budget you build before contacting sales is a guess.; 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.
  • They diverge on capability: Kameleoon covers Visual A/B test editor, Percy covers Screenshot diffing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kameleoon and Percy actually diverge.

Attributes where Kameleoon and Percy differ
AttributeKameleoonPercy
Starting priceOn requestFree
Pricing modelquoteFreemium, paid tiers by screenshot volume
Free tierNoYes
PlatformsWeb, iOS, AndroidWeb

Identical on both: user rating (Not yet rated), category (Testing).

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 Kameleoon

  • Visual A/B test editor
  • Server-side experimentation
  • Feature flags
  • Anti-flicker engine
  • AI personalisation
  • EU data hosting
  • Shared audiences
  • Statistics options

Only in Percy

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

What people use each for

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

Kameleoon

  • A European retailer whose legal team requires EU-hosted experimentation data and has ruled out US-only vendorsnot Percy
  • A team running both marketing page tests and product feature rollouts that wants one results engine rather than two disagreeing onesnot Percy
  • A media site where client-side flicker on a test variant is visibly damaging the reading experiencenot Percy
  • An organisation re-tendering experimentation after Optimizely or VWO pricing changes and wanting an independent European vendornot Percy

Percy

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

Where each one falls short

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

Kameleoon

  • No rate card is published. Reported entry pricing around several hundred euros a month for the limited prompt-based tier comes from third parties rather than Kameleoon, so any budget you build before contacting sales is a guess.
  • Web experimentation, feature experimentation and personalisation are licensed as separate capabilities, so the unified platform story costs materially more than the entry configuration most buyers are first quoted.
  • The partner and agency ecosystem is concentrated in France and continental Europe; a buyer in North America or Asia will find fewer implementation specialists and less community knowledge than for Optimizely or VWO.
  • The integration catalogue is smaller than the market leaders, so a stack built on less common analytics or CDP tooling may need custom work that a larger vendor would cover natively.
  • Client-side visual testing still carries the structural problems of the approach, including performance cost and single-page-application fragility; the anti-flicker engine reduces the symptom but does not remove the dependency on the DOM staying stable.

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.

Pricing, plan by plan

Kameleoon

On request
  • Kameleoon$undefined/year
    • Priced on monthly tested users and features licensed
    • Web experimentation, feature experimentation and personalisation licensed separately
    • Free trial of the prompt-based experimentation feature, with data not retained afterwards

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

Which should you pick?

Choose Kameleoon if

  • You need visual a/b test editor.
  • You work on Web, iOS, Android.
  • You also want server-side experimentation.
Kameleoon review

Choose Percy if

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

Questions people ask

Is Kameleoon or Percy better?
Neither clearly leads. Kameleoon starts at On request and Percy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kameleoon or Percy?
Percy has a free tier; the other does not. Paid plans start at On request for Kameleoon and Free for Percy.
Does Kameleoon or Percy run on more platforms?
Kameleoon runs on Web, iOS, Android. Percy runs on Web.
Can I use Percy for free?
Yes. Percy has a free tier, so you can try it without paying. Kameleoon starts at On request.
What is Kameleoon best used for?
Kameleoon is most often used for a european retailer whose legal team requires eu-hosted experimentation data and has ruled out us-only vendors, a team running both marketing page tests and product feature rollouts that wants one results engine rather than two disagreeing ones, a media site where client-side flicker on a test variant is visibly damaging the reading experience, an organisation re-tendering experimentation after optimizely or vwo pricing changes and wanting an independent european vendor. Of those, a european retailer whose legal team requires eu-hosted experimentation data and has ruled out us-only vendors and a team running both marketing page tests and product feature rollouts that wants one results engine rather than two disagreeing ones are not what Percy is typically brought in for.
What can Kameleoon do that Percy cannot?
Kameleoon covers Visual A/B test editor, Server-side experimentation, Feature flags, Anti-flicker engine. Percy covers Screenshot diffing, Framework integrations, Responsive and cross-browser snapshots, Review workflow.

Answered from the vendors’ own pages

Kameleoon: Does Kameleoon publish pricing?

No. Pricing depends on monthly tested users and which capabilities you licence, and requires a sales conversation.

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.

Kameleoon: Can I keep data in the EU?

Yes. EU hosting and a GDPR-first consent model are among the main reasons European buyers shortlist it.

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.

Kameleoon: Does it do feature flags as well as A/B tests?

Yes, through server-side SDKs, sharing audiences and results with the visual testing side.

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.

Kameleoon: How does it compare with Optimizely?

Similar capability at a smaller scale. Kameleoon's advantages are European data residency and an independent vendor; Optimizely's are ecosystem size and partner availability.

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