Testing · head to head
Kameleoon vs TestNG
Kameleoon
Testing
A/B testing and feature experimentation with a hybrid client and server-side engine
- From
- On request
- Rated
- -
TestNG
Testing
Java testing framework created by Cedric Beust, still actively maintained but effectively a single-lead project
- From
- Free
- Rated
- -
The short version
- Only TestNG 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.; TestNG maintainership is concentrated around creator Cedric Beust rather than a broad team or foundation, which is a real continuity risk compared to JUnit's independent team or Jest's foundation backing.
- They diverge on capability: Kameleoon covers Visual A/B test editor, TestNG covers Test dependencies.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Kameleoon and TestNG 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 TestNG
- Test dependencies
- XML suite configuration
- Native parallel execution
- Data providers
- Grouping
- Flexible reporting
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 TestNG
- A team running both marketing page tests and product feature rollouts that wants one results engine rather than two disagreeing onesnot TestNG
- A media site where client-side flicker on a test variant is visibly damaging the reading experiencenot TestNG
- An organisation re-tendering experimentation after Optimizely or VWO pricing changes and wanting an independent European vendornot TestNG
TestNG
- A Java integration test suite that needs to skip dependent tests automatically when a prerequisite test failsnot Kameleoon
- A team wanting XML-based suite configuration to manage large, grouped test suites without touching code for each runnot Kameleoon
- A project needing native parallel test execution at the class or method level without adding a separate pluginnot Kameleoon
- A Selenium-based UI test suite that uses TestNG as the underlying runner for grouping and parallelisationnot 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.
TestNG
- Maintainership is concentrated around creator Cedric Beust rather than a broad team or foundation, which is a real continuity risk compared to JUnit's independent team or Jest's foundation backing.
- It is a smaller ecosystem than JUnit, so fewer third-party integrations, tutorials and Stack Overflow answers exist for edge cases.
- XML-based suite configuration, while powerful, is an extra file and syntax to maintain alongside the codebase, which some teams find adds friction JUnit's more code-centric model avoids.
- There is no commercial support tier or vendor relationship of any kind, unlike JUnit's OpenElements arrangement, so an enterprise wanting a support contract has no route to buy one.
- Release cadence, while active, is slower and less frequent than JUnit 5's, since it depends on a much smaller pool of active maintainers.
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
TestNG
Free- TestNGFree
- Full functionality, no usage limits
- Community support via GitHub
- No commercial support tier exists
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 TestNG if
- You need test dependencies.
- You want to start without paying.
- You work on Linux, macOS, Windows.
- You also want xml suite configuration.
Questions people ask
- Is Kameleoon or TestNG better?
- Neither clearly leads. Kameleoon starts at On request and TestNG at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Kameleoon or TestNG?
- TestNG has a free tier; the other does not. Paid plans start at On request for Kameleoon and Free for TestNG.
- Does Kameleoon or TestNG run on more platforms?
- Kameleoon runs on Web, iOS, Android. TestNG runs on Linux, macOS, Windows.
- Can I use TestNG for free?
- Yes. TestNG 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 TestNG is typically brought in for.
- What can Kameleoon do that TestNG cannot?
- Kameleoon covers Visual A/B test editor, Server-side experimentation, Feature flags, Anti-flicker engine. TestNG covers Test dependencies, XML suite configuration, Native parallel execution, Data providers.
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.
TestNG: Is TestNG still actively maintained in 2026?
Yes, it continues to receive releases in its 7.x line with support for current Java versions, though maintenance is concentrated around a small team led by its creator.
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.
TestNG: What does TestNG offer that JUnit does not?
Native test dependencies, XML-based suite configuration and built-in parallel execution without needing external plugins, all of which JUnit users typically add via separate libraries.
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.
TestNG: Is there a commercial support option for TestNG?
No, unlike JUnit there is no commercial support arrangement; support is purely community-based through GitHub.
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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