Kameleoon vs Optimizely

Kameleoon

The plans page documents server-side testing, mobile app testing, multivariate experiments and targeting on more than forty user properties, alongside feature flags with progressive rollout and mutually exclusive groups and holdouts, which goes past solid mid-level capability. We found no public information on edge or CDN delivery, on which SDK languages are supported, or on multi-page tests or personalisation tested against a control.

Optimizely

The product pages advertise A/B, multi-page, feature and server-side testing with real-time personalisation and audience targeting, which is a solid middle position on this scale. Beyond that, we found no public information on documented SDKs, mutually exclusive experiment groups, holdouts, or edge delivery.

Kameleoon

Sequential testing, multiple testing correction, automatic sample ratio mismatch detection and CUPED are all named on the plans and homepage, which covers most of the guardrail set I look for. We found no public information naming the underlying statistical method, showing confidence or credible intervals or a sample-size calculator, and no guardrail metrics that can stop a harmful test.

Optimizely

The plans page promises a proprietary Stats Engine for results you can trust, and we found no public information naming the statistical method, giving sample-size or duration guidance, or warning against stopping a test early. As the person who has to certify a result to a regulator, I cannot even tell from these pages whether a Bayesian or frequentist model decides the winner.

Kameleoon

The captured privacy policy lists cookie purposes and an opt-out for Kameleoon's own website, but we found no public information on what the test script stores on a visitor's device, whether it may run before the consent banner is answered, or any integration with consent management platforms. No storage keys with lifetimes, no cookieless or consent-pending mode, and no IP anonymisation are documented anywhere on the captured pages.

Optimizely

The consent guidance tells customers how to collect consent for personal data — affirmative action, per-purpose, stored and tracked — but it is entirely about the customer's own forms: we found no public information on whether the test script may run before the banner is answered, what it stores on the device, or any consent-pending mode. The privacy notice further describes a hashed user identifier created for social networks such as Google and LinkedIn, which makes the absence of a published storage-key list more worrying.

Kameleoon

A single vendor claim is published — a snippet that loads under 70 ms with 99.99 percent uptime — with nothing behind it. We found no public information on script size, asynchronous loading, flicker handling, or any measured effect on Core Web Vitals, and no self-hosting or first-party-domain option.

Optimizely

We found no public information on script size, loading behaviour, flicker handling, or effects on Core Web Vitals anywhere in the captured pages. What I can see is marketing language about high performance delivery, which tells me nothing about what the snippet costs the page it tests.

Kameleoon

There is a documented API with Bearer authentication and pagination for exporting segments, a two-way BigQuery integration where goals pull conversion data from the warehouse on a schedule, plus CDP, analytics and heatmapping integrations. We found no public information on visitor-level raw data export or stated API rate limits, and the data warehouse capability is a premium add-on priced only on request.

Optimizely

Warehouse-native analytics with documented connections to Google BigQuery, Snowflake, Databricks and Amazon Redshift is the strongest part of this file, including the setup steps for querying the customer's own warehouse. However, we found no public information on visitor-level raw data export, a documented API with stated limits, or export of full historical experiment data for independent re-analysis.

Kameleoon

The contracting entity is a French simplified joint stock company under French law before the Commercial Court of Paris, the legal notice names Hetzner Online GmbH in Gunzenhausen, Germany as host, and the privacy policy states that personal data is stored on servers in the European Union. That statement covers the vendor's website users, and we found no published subprocessor list, no confirmation of where the snippet itself is delivered from, and no published DPA covering the visitor data the script collects.

Optimizely

Multiple contracting entities are named, including Optimizely AB and a Berlin company, but the applicable entity depends on the deal, and we found no public information on where visitor data is processed or stored. The privacy notice lists only categories of recipients — hosting, analytics, storage — rather than a published subprocessor list naming the CDN, and transfers outside the EU rest on the EU-US Data Privacy Framework rather than EU processing.

Kameleoon

The plans page shows a free trial — "Free 30 days. No credit card required." with up to 3 experiments — and an Enterprise tier at "Custom" with unlimited tested traffic, plus a list of starter add-ons that carry no prices, while the data warehouse integration says "Contact your Customer Success Manager for more information." We found no public information on tier prices, the traffic metric, its limits, or what happens above them, so the annual invoice cannot be computed from public pages.

Optimizely

The plans page states every plan is individually packaged through a contact form, so no tier price is public and an annual cost cannot be computed. The subscription terms do publish the mechanics that will surprise buyers — usage-volume overage at two times the unit price invoiced monthly in arrears, automatic twelve-month renewal, ninety-day cancellation notice — but mechanics without figures leave the invoice unknowable.