Testing · head to head
Kameleoon vs Selenium
Kameleoon
Testing
A/B testing and feature experimentation with a hybrid client and server-side engine
- From
- On request
- Rated
- -
Selenium
Testing
Browser automation framework and the W3C WebDriver standard
- From
- Free
- Rated
- -
The short version
- Only Selenium 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.; Selenium flaky tests are the standing complaint: explicit waits and synchronisation are the tester’s job, where newer tools handle it automatically
- They diverge on capability: Kameleoon covers Visual A/B test editor, Selenium covers W3C WebDriver.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Kameleoon and Selenium actually diverge.
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 Selenium
- W3C WebDriver
- Many language bindings
- Selenium Grid
- Broad browser support
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 Selenium
- A team running both marketing page tests and product feature rollouts that wants one results engine rather than two disagreeing onesnot Selenium
- A media site where client-side flicker on a test variant is visibly damaging the reading experiencenot Selenium
- An organisation re-tendering experimentation after Optimizely or VWO pricing changes and wanting an independent European vendornot Selenium
Selenium
- Cross-browser testing where Safari and legacy browsers must be coverednot Kameleoon
- Teams whose test suites are written in Java or C# rather than JavaScriptnot Kameleoon
- Distributing a large suite across a grid of machinesnot 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.
Selenium
- Flaky tests are the standing complaint: explicit waits and synchronisation are the tester’s job, where newer tools handle it automatically
- Setup involves drivers, versions and grid infrastructure that Playwright and Cypress bundle away
- Slower to run than tools that talk to browsers over a debugging protocol rather than WebDriver
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
Selenium
Free- SeleniumFree
- Full functionality
- Unlimited tests
- Community support
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.
Choose Selenium if
- You need w3c webdriver.
- You want to start without paying.
- You work on Linux, macOS, Windows, Web.
- You also want many language bindings.
Questions people ask
- Is Kameleoon or Selenium better?
- Neither clearly leads. Kameleoon starts at On request and Selenium at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Kameleoon or Selenium?
- Selenium has a free tier; the other does not. Paid plans start at On request for Kameleoon and Free for Selenium.
- Does Kameleoon or Selenium run on more platforms?
- Kameleoon runs on Web, iOS, Android. Selenium runs on Linux, macOS, Windows, Web.
- Can I use Selenium for free?
- Yes. Selenium 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 Selenium is typically brought in for.
- What can Kameleoon do that Selenium cannot?
- Kameleoon covers Visual A/B test editor, Server-side experimentation, Feature flags, Anti-flicker engine. Selenium covers W3C WebDriver, Many language bindings, Selenium Grid, Broad browser support.
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.
Selenium: Is Selenium free?
Yes, open source with no licence fee. Paid costs come from grid infrastructure or services like BrowserStack.
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.
Selenium: Selenium or Playwright?
Playwright handles waiting automatically and is faster to set up, which removes most flakiness complaints. Selenium wins on language breadth, browser coverage including Safari, and existing suites you already have.
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.
Selenium: Is Selenium still relevant?
Yes. Its WebDriver protocol is a W3C standard implemented by every major browser, and very large existing suites are not rewritten cheaply.
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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