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Conversion Optimization

CUX

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Panel rating · 6 judges · How to read the stars

Category median

Sovereignty: not determined

0–5 in half steps. 5 means the rubric's top anchor is met on the evidence.

by CUX sp. z o.o. · cux.io

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CUX: AI-assisted analysis on whats-best.ai CUX: AI-assisted analysis on whats-best.ai (dark)

Add ?theme=dark to the image address for dark backgrounds. The badge shows the category and the month of the latest evaluation, and EU-Made where that is the product’s provenance. It never shows a score.

CUX at a glance

Vendor
CUX sp. z o.o.
Headquarters
Not stated on the vendor’s pages as of 3 Nov 2026
Data hosting
Not stated on the vendor’s pages as of 3 Nov 2026
Free plan
Not stated on the vendor’s pages as of 3 Nov 2026
Panel verdict
The AI panel rates CUX 1/5, the mean of 6 judges. CUX is a digital experience analytics platform, and the vendor's own knowledge base states it "is not a tool for creating A/B tests", with setup and traffic distribution assigned to a testing platform, so experimentation scope and statistical rigour both range 0 to 0 — its documented role is analysing experiments through goals, waterfalls and heatmaps. how scores are made
As of
Vendor pages captured 3 Nov 2026; evaluated by the panel 4 Nov 2026. all sources

CUX alternatives, European ones first →

Read this page as one judge. Each weighs the same scores by what they care about.

The Data Protection Officer

Weighted verdict

Has to answer whether the test script may run before the consent banner is answered, and usually finds the vendor has not said. Wants the storage keys listed, a documented consent-pending mode, visitor data processed in the EU, and a published subprocessor list that includes the CDN.

Same scores as the panel view — this lens weights them the way this judge cares.

Scored by The Data Protection Officer

Panel median The Data Protection Officer This judge’s scores over the panel median. Each label opens its reasoning below.
Scores per criterion, in stars out of 5
Criterion Panel median The Data Protection Officer
Experiment types & delivery 0 of 5 0 of 5
Statistical method & guardrails 0 of 5 0 of 5
Consent & visitor tracking 1.5 of 5 1 of 5
Snippet performance & flicker 1 of 5 1 of 5
Analytics, data export & integrations 2 of 5 1.5 of 5
European sovereignty 2.5 of 5 2 of 5

Experiment types & delivery

How this is scored

What can be tested and where: client-side changes through an editor, server-side and feature experiments through SDKs, multivariate and multi-page tests, and personalisation — judged on what the documentation shows rather than on the feature grid.

0 — Not an experimentation tool; the product cannot split traffic or serve variants (analytics, heatmaps or session recording only).

3 — Client-side A/B tests built in a visual editor, with a traffic split and targeting by URL or device.

5 — A/B, split-URL and multivariate tests through a visual or code editor, audience targeting on behaviour and attributes, and either rule-based personalisation or server-side experiments through a documented SDK.

8 — Client-side and server-side experiments through documented SDKs for common languages, multi-page tests, feature-flag experiments sharing one audience and metric model with web tests, mutually exclusive experiment groups, holdouts, and personalisation that can itself be tested against a control.

10 — One experimentation programme across every surface: web, app, server and edge from the same platform, experiment interactions managed, a documented experiment lifecycle from hypothesis to archived result, and a library of past results a team can search.

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The Data Protection Officer

The vendor states in writing that CUX is not a tool for creating A/B tests and that test setup and traffic distribution must be done in a platform of the customer's choice, with CUX's role confined to analysing variants through goals, waterfalls and heatmaps. By its own documentation the product cannot split traffic or serve variants, so this sits at the base of the scale. 3 4 10

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Statistical method & guardrails

How this is scored

Which statistics decide the winner and what protects the customer from misreading them. Scored on what the vendor documents: the method by name, how peeking and multiple comparisons are handled, and whether sample ratio mismatch is detected.

0 — No statistical evaluation; the product shows raw counts per variant and leaves the decision to the user.

3 — A results report per variant with the method named (frequentist or Bayesian) and a significance or probability-to-beat figure.

5 — A documented method with confidence or credible intervals shown per variant, and a sample-size or test-duration calculator or stated guidance on when a result may be read.

8 — Sequential testing or another documented protection against peeking, plus correction for multiple metrics or variants, sample ratio mismatch detection, variance reduction such as CUPED, and guardrail metrics that can stop a harmful test.

10 — The statistics are auditable: methodology published in enough detail to reproduce a result, the choice of method explained per use case, raw per-visitor data available for independent re-analysis, and the interface refuses to present an underpowered result as a conclusion.

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The Data Protection Officer

The captured pages place test setup in an external tool and offer variant analysis through goals, waterfalls and heatmaps, and we found no public information naming a statistical method, a significance or probability figure, or any guardrail such as sample-size guidance. The A/B testing knowledge-base page itself carries no article text. 3 4 10

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Snippet performance & flicker

How this is scored

The cost the client-side snippet imposes on the page it tests: blocking load, flicker of original content, script weight and the effect on Core Web Vitals — scored on what the vendor measures and publishes, not on "lightning fast".

0 — A synchronous, render-blocking snippet stated as the only way to install the product, with no flicker handling.

3 — An asynchronous or anti-flicker snippet with a timeout, described in the installation documentation.

5 — Asynchronous loading and flicker handling explained with their trade-off, the snippet delivered from a CDN, and its size or loading behaviour documented.

8 — Published performance figures including the impact on Core Web Vitals, a self-hosting or first-party-domain option for the script, per-project bundles containing only active experiments, and a server-side or edge alternative for flicker-sensitive tests.

10 — Performance is a stated commitment: measured overhead published and maintained, flicker eliminated by edge or server-side rendering as a documented path, and tooling that shows the customer what their own configuration costs the page.

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The Data Protection Officer

Installation via Google Tag Manager is documented, and enterprise clients are offered client-side script hosting and self-hosting, but the snippet installation article body is absent from the captured page. We found no public information on loading behaviour, flicker handling, script weight or impact on Core Web Vitals. 2 7 8

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Analytics, data export & integrations

How this is scored

Getting results and raw data out: integration with analytics and tag management, export of visitor-level results, warehouse-native analysis, and an API — because an experiment result that cannot be checked in the customer's own data is a claim, not a finding.

0 — A closed dashboard: the vendor states that results cannot be exported or sent to another tool.

3 — Results exportable as a CSV file or report, and an integration with at least one named analytics tool.

5 — Integrations with common analytics and tag managers (Google Analytics, Adobe Analytics, Google Tag Manager or similar), export of results, and a documented API or webhooks.

8 — Visitor-level raw data export or streaming to a data warehouse, warehouse-native analysis on the customer's own metrics, CDP integration for audiences, and an API for managing experiments and reading results with stated limits.

10 — The platform treats the customer's warehouse as the source of truth: metrics defined once and computed there, full historical experiment data exportable in open formats, and a versioned API a team can build its own programme tooling on.

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The Data Protection Officer

A Google Analytics integration, Google Tag Manager installation, a dataLayer capture feature for finding matching visits, and a weekly report are documented, with the full single-user visit history visible within the retention period. We found no public information on a documented API, webhooks, or visitor-level export of raw data to the customer's own systems. 6 9 10

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European sovereignty

How this is scored

Where visitor data is processed and stored and who the contracting entity is. Independently sourced by the sovereignty pipeline; weighted higher here than in categories that hold only the customer's own data, because the script runs on every visitor to the customer's site and their behaviour is what the platform records.

0 — Vendor, contracting entity and processing of visitor data all shown to be outside the EU, with no transfer safeguard stated.

3 — A named contracting entity and a privacy policy or data processing agreement; EU data residency offered as an option or add-on, or the hosting location not stated.

5 — EU hosting or EU processing of visitor data stated as standard, together with an EU contracting entity or a published subprocessor list, and a data processing agreement offered.

8 — EU contracting entity, EU hosting on named infrastructure including the delivery of the snippet, a subprocessor list published with locations, and a data processing agreement covering the visitor data the script collects.

10 — Sovereign end to end and evidenced: vendor, entity, hosting, snippet delivery and every subprocessor European, certification published, and no visitor data reaching a non-EU party at any point.

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The Data Protection Officer

Visitor data is stated to be hosted only in ISO 27001-certified data centres in Frankfurt, Warsaw, Roubaix and Strasbourg with EU-based storage, under CUX Research Sp. z o.o. of Wrocław with published Polish KRS, NIP and REGON registration. We found no published subprocessor list — including where the snippet itself is delivered from — and no data processing agreement documented on the captured pages. 2 10

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Pricing transparency not rated — the vendor publishes no price

How this is scored

A category priced by traffic — monthly tracked users, visitors or impressions — where the tier a site lands in depends on numbers the buyer has to estimate. Whether a buyer can compute the real annual cost including traffic limits, overage, server-side or personalisation modules and seats — from public pages alone.

0 — No public prices at all; every tier is a sales conversation.

3 — A public "from" price, a free tier or one priced tier, while the other tiers or the traffic metric behind the price are not stated.

5 — Prices public per tier with the billing period and the traffic metric (tracked users, visitors or impressions) and its limits stated; modules such as server-side SDKs or personalisation, or overage, may still be "contact sales".

8 — Every tier and module priced publicly with the traffic metric defined, limits, overage rates, seats, minimum term and VAT treatment stated.

10 — Complete price computability: annual invoice derivable for a given traffic volume, set of modules and team size, with overage and every add-on published.

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The Data Protection Officer

The only public offer we found is a free trial, and we found no public information on prices, tiers, the traffic metric behind them, or their limits on the captured pages. A buyer cannot compute an annual cost from what is published. 6

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European sovereignty — proven facts

0 of 6 dimensions proven

Built only from facts shown on the vendor's own pages. A dimension we could not prove is left open, not scored as zero.

Hosting location Not determined ⚠ unverified — uncited Report an error
Hosting options Not determined — uncited Report an error
Open source Not determined — uncited Report an error
Data processing agreement Not determined — uncited Report an error
Transfer impact assessment Not determined ⚠ unverified — uncited Report an error

Questions about CUX

Is CUX European?

Not determined: the vendor’s pages as captured do not say where CUX is based.

Where does CUX store data?

Not stated on the vendor’s pages as of 3 Nov 2026.

Does CUX have a free plan?

Not stated on the vendor’s pages as of 3 Nov 2026.

What are the best alternatives to CUX?

As of 4 Nov 2026, the panel rates GrowthBook (3.5/5), Varify.io (3/5) and AB Tasty (3/5) highest among the other 37 Conversion Optimization products evaluated. Ratings that look equal are rounded to half stars; the order uses the unrounded rating, then the name. The highest-rated European alternative is Varify.io (EU-Made). Ratings are the AI panel’s opinion, formed from public evidence: how scores are made. The full list, with European products first: CUX alternatives.

Where this could be wrong

What we left out

A claim that does not survive our checks costs us the claim, not the page. This is what was taken off this one.

Do you know more about CUX? Tell us Report an error on this page

Sources (10)

The pages every claim on this page was read from — each one checked, dated, and kept verifiable.

  1. 1 Vendor page cux.io Checked 3 Nov 2026 Details →
  2. 2 Security / trust page — found from the homepage cux.io Checked 3 Nov 2026 Details →
  3. 3 Experiment types & delivery — found from sitemap cux.io Checked 3 Nov 2026 Details →
  4. 4 Experiment types & delivery — found from sitemap cux.io Checked 3 Nov 2026 Details →
  5. 5 Consent & visitor tracking — found from sitemap cux.io Checked 3 Nov 2026 Details →
  6. 6 Consent & visitor tracking — found from sitemap cux.io Checked 3 Nov 2026 Details →
  7. 7 Snippet performance & flicker — found from sitemap cux.io Checked 3 Nov 2026 Details →
  8. 8 Snippet performance & flicker — found from sitemap cux.io Checked 3 Nov 2026 Details →
  9. 9 Analytics, data export & integrations — found from sitemap cux.io Checked 3 Nov 2026 Details →
  10. 10 Analytics, data export & integrations — found from sitemap cux.io Checked 3 Nov 2026 Details →