# AB Tasty — Conversion Optimization

AB Tasty by AB Tasty SAS holds a panel rating of 2.5/5 from 6 AI judges (category median 2/5), as of 2026-10-15. Provenance: provenance unknown; sovereignty: not determined.

- Vendor: AB Tasty SAS (https://www.abtasty.com)
- Category: [Conversion Optimization](https://whats-best.ai/software/conversion-optimization.md)
- Provenance (editorial classification): provenance unknown
- Canonical page: https://whats-best.ai/software/conversion-optimization/ab-tasty
- Alternatives: https://whats-best.ai/software/conversion-optimization/ab-tasty/alternatives ([markdown](https://whats-best.ai/software/conversion-optimization/ab-tasty/alternatives.md))
- Data as of: 2026-10-21 · evaluated 2026-10-15 · oldest source captured 2026-10-13

**AI-generated.** Every score, rationale and verdict here is written by a panel of AI judges from public evidence — an analysis, not a hands-on test. Every fact quotes the vendor page it was read from. No score can be bought. How scores are made: https://whats-best.ai/methodology

## At a glance

- Vendor: AB Tasty SAS
- Headquarters: Not stated on the vendor’s pages as of 13 Oct 2026
- Data hosting: Not stated on the vendor’s pages as of 13 Oct 2026
- Free plan: Not stated on the vendor’s pages as of 13 Oct 2026

## The panel's verdict

AB Tasty's bench results are strongest on data and integrations, where scores run 6 to 7: a public API with role-based revocable credentials, BigQuery, Redshift and Snowflake connectors with daily exports, and all collected data exportable through the Data Explorer API. Statistical rigour scores sit level at 6 on a named Bayesian framework with a documented Frequentist mode, sequential testing and a sample-ratio-mismatch check. Experimentation scope spans 5 to 7 across visual and code editors, multivariate tests and server-side SDKs. The genuine splits are sovereignty, 0 to 3, and performance impact, 4 to 6. Sovereignty split the judges over how much a French corporate form and first-party cookies weigh when we found no public information on hosting, a subprocessor list or a data-processing agreement, and the SDK connects to the closest CDN endpoint regardless of physical location. Performance scores divided between crediting the documented architecture — server-side flag fetching, local bucketing, 304 polling — and that no published script-size or Core Web Vitals figures appear. No prices appear on the captured pages, and that score is excluded from the weighted verdicts.

**Speaks for it:**
- Warehouse connectors export to BigQuery, Redshift and Snowflake, with daily exports that can be run as often as needed
- All collected data can be exported through the Data Explorer API, and the public API grants role-based, revocable credentials
- Statistical rigour scored level at 6 on a named Bayesian framework, a documented Frequentist mode, sequential testing and sample ratio mismatch in the reporting
- A server-side rendering path fetches flags per page request to avoid flicker, and bucketing assigns variations locally after a one-time CDN fetch with 304 polling
- Cookie and storage lifetimes are published alongside three consent modes, and all stored visitor data is erased when consent is lost

**Held against it:**
- Sovereignty scored 0 to 3 — the flagged disagreement among the judges — and we found no public information on where visitor data is hosted, on any subprocessor list, or on a data-processing agreement
- No published figures for script size, load cost or Core Web Vitals impact appear on the captured pages, and we found no public information on self-hosting the script
- We found no public information on holdouts, mutually exclusive experiment groups, a sample-size or duration calculator, multiple-comparison correction, or guardrail metrics
- A documented consent configuration displays campaigns and tracks data without requesting consent, and we found no public information on IP anonymisation or a cookieless mode
- The SDK connects to the closest CDN endpoint regardless of physical location, and session storage keeps temporary data from external services such as geolocation and weather

**Best for:**
- You need experiment results in your own stack, where warehouse exports and the export API form the strongest-scoring area at 6 to 7
- Your team combines no-code web testing with server-side delivery and needs assignments consistent across platforms on a shared visitor ID
- You assess vendors on documented statistical method — the Bayesian primary framework with a mapped Frequentist mode scored level at 6
- Your consent flow runs through a tag manager, with published cookie lifetimes and erasure of stored data on consent withdrawal documented

**Avoid if:**
- You must verify where visitor data is hosted or name subprocessors before contracting — sovereignty scored 0 to 3 and is the judges' flagged disagreement
- You need warehouse-native analysis on your own metrics — the documented flow designs reports from AB Tasty-collected data and exports them
- You require published script-size or Core Web Vitals figures before deploying a client-side tag — ask the vendor: the public pages we read do not show it

## Scores by judge and criterion

Scores out of 5, each judge scoring independently against the published rubric (v1). "n/r" = not rated: the vendor publishes no price.

| Criterion | The Growth Lead | The E-Commerce Manager | The Product Engineer | The CRO Consultant | The Data Protection Officer | The Skeptic |
| --- | --- | --- | --- | --- | --- | --- |
| Experiment types & delivery | 3/5 | 3/5 | 3.5/5 | 2.5/5 | 3/5 | 3/5 |
| Statistical method & guardrails | 3/5 | 3/5 | 3/5 | 3/5 | 3/5 | 3/5 |
| Consent & visitor tracking | 3/5 | 3/5 | 3/5 | 3/5 | 2.5/5 | 3/5 |
| Snippet performance & flicker | 2/5 | 2.5/5 | 3/5 | 2.5/5 | 3/5 | 2/5 |
| Analytics, data export & integrations | 3/5 | 3.5/5 | 3.5/5 | 3.5/5 | 3.5/5 | 3.5/5 |
| European sovereignty | 1.5/5 | 0/5 | 1/5 | 0.5/5 | 0.5/5 | 0.5/5 |
| Pricing transparency | n/r | n/r | n/r | n/r | n/r | n/r |
| **Weighted verdict** | **3/5** | **2.5/5** | **3/5** | **2.5/5** | **2/5** | **3/5** |

### The judges

- **The Growth Lead** (v1.0): Runs the testing programme for a German marketing team and reports uplift to the board. Wants a visual editor the team can use without a developer, targeting that goes beyond the URL, and results she can defend when finance asks where the promised revenue went.
- **The E-Commerce Manager** (v1.0): Owns a shop where a tenth of a second of load time shows up in the conversion rate. Wants personalisation that can be tested against a control, a snippet that does not flicker the product page, and a traffic-based price that does not jump a tier every December.
- **The Product Engineer** (v1.0): Ships experiments behind feature flags and would rather not ship a third-party script at all. Wants server-side SDKs for the stack in use, edge delivery, metrics computed in the warehouse the team already trusts, and an API good enough to build internal tooling on.
- **The CRO Consultant** (v1.0): Sets up testing programmes for several clients and has to recommend a platform each can afford and defend. Reads for multi-project management, clean analytics integration, a consent setup a client's DPO will sign off, and a traffic metric she can estimate before the contract.
- **The Data Protection Officer** (v1.0): 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.
- **The Skeptic** (v1.0): A statistician who has watched too many "winners" regress to zero. Reads for the method by name, what stops a team from peeking, sample ratio mismatch checks and multiple-comparison corrections — and treats a "probability to beat" without documented assumptions as marketing.

## European sovereignty — proven facts

Built only from facts on the vendor's own pages; a dimension we could not prove is left open, never scored as zero. Headline: not determined.

| Dimension | Finding | Points | Source |
|---|---|---|---|
| Legal entity | Not determined | — | — |
| Ownership | Not determined | — | — |
| Data residency | Not determined | — | — |
| Subprocessors | Not determined | — | — |

## Key facts

Each fact is the vendor's own statement, cited to the source page it was read from ([S*n*] → Sources).

**Compliance**
- Consent proof content: Stored consent info: date and time, condition and mode used, visitor ID, perimeter [S5]
- Consent proof retention: AB Tasty servers · 13 [S5]
- GDPR consent: Explicit consent required before tracking under GDPR (EDPB guidelines, May 4, 2020) [S5]

**Data**
- Export reporting: yes [S4]

**Hosting**
- Cdn closest endpoint: SDK connects to closest CDN endpoint for fastest response [S8]

**Integrations**
- Bigquery connector: yes [S10]
- Data explorer API: All collected data exportable via Data Explorer API [S10]
- Public API admin required: yes [S9]
- Public API capabilities: recover campaign information · monitor campaigns (run, pause, schedule, duplicate tests and personalizations) · manage account users · update library · empty library in emergency [S9]
- Public API credentials: partner creates token from credentials · ClientID and ClientSecret [S9]
- Public API credentials search: Credential history searchable and displayed in reverse chronological order [S9]
- Public API revocation: yes [S9]
- Public API roles: Access granted via predefined roles; at least one role must be selected [S9]
- Public API routes: Public API provides routes to access the AB Tasty platform [S9]
- Public API third party access: yes [S9]
- Redshift connector: yes [S10]
- Snowflake connector: yes [S10]

**Pricing**
- Quota monthly: Data Explorer requests limited by a monthly quota reset on the first of the month [S10]

**Product**
- Ab test creation steps: Main information · Editor · Goals · Targeting · Traffic allocation · Advanced options · QA [S1]
- Ab test definition: modify one element on one page or a string of equivalent pages sharing the same layout, and measure if new variation(s) perform better or worse than original [S1]
- Abtasty cookie lifetime: ABTasty · yes · 13 [S5]
- Abtastysession cookie lifetime: ABTastySession · yes · 30 [S5]
- Abtastysession referrer param: Referrer parameter stored when 'source' or 'source type' criteria used in targeting [S5]
- Action tracking: yes [S1]
- Ally virtual assistant: yes [S2]
- Aov analysis guidance: Documentation covers AOV analysis pitfalls for conversion rate optimization [S4]
- Bucketing cache sdks: JS · React · React Native · iOS · Android · JAVA · PHP · v3 [S8]
- Bucketing consistent across platforms: Variation assignments remain consistent across platforms when using the same visitorID [S8]
- Bucketing definition: Bucketing replaces Decision API calls with a one-time call to a bucketing file so the SDK executes variation assignment logic locally [S8]
- Bucketing file 304 polling: SDK polls CDN with last-modification header; CDN replies 304 when unmodified [S8]
- Bucketing murmurhash: SDK uses MurmurHash algorithm to compute variation assignment [S8]
- Bucketing offline: Event tracking and campaign activation calls are asynchronous; no persistent internet connection needed [S8]
- Bucketing vs bucket allocation: Bucketing (SDK Local mode) is distinct from Bucket allocation (test feature) [S8]
- Client side after load: After browser load, the Flagship SDK works as in client-side rendering mode [S7]
- Code editor: yes · JavaScript · CSS [S1]
- Code on github: yes [S7]
- Consent configuration options: Three consent options: no restriction, manage consent via third-party tool (TMS), delegate to AB Tasty [S5]
- Consent erasures: On consent loss all stored data for the visitor is erased; cookies set with already-expired date [S5]
- Cookie deposit method location: Cookie deposit method configurable at Settings > Cookies > Cookie deposit method [S5]
- Cookie domain widest: The tag always uses the widest possible domain for the tracking cookie [S6]
- Cookie purpose: Stores visitor ID, campaign history, timestamp history for all sessions [S5]
- Cookie scope domain setting: Tracking cookie is set on the configured domain (e.g. .website.com); a www-prefixed domain yields .www.website.com [S6]
- Cookie sharing direction: Cookies are shared from parent domain down to subdomains, not the reverse [S6]
- Cookie tracking matrix risk: Declaring order.website.com and www.website.com carries tracking risk: visitors on order won't be recognized on www [S6]
- Daily exports: yes [S10]
- Data warehouse integration: Design a report from data collected by AB Tasty and export to external Data Warehouse [S10]
- Decision modes: DECISION_API · BUCKETING [S7]
- Default traffic allocation: equal per variation · 50/50 for A/B, 33/33/33 for A/B/C · no [S1]
- Editors available: yes · changing color of a button · replacing an image · changing wording of an element [S1]
- Editors visual and code: yes · yes [S2]
- Emotion AI module exists: Emotions AI · yes [S3]
- Emotion AI segments threshold: positive gain >0 · 90 · 0.1 [S3]
- First party cookies: yes [S5]
- Frequentist activation: CSM must activate the feature for the account [S3]
- Frequentist confidence intervals: yes · yes [S3]
- Frequentist metric changes: replaced by p-value · switches to Frequentist one [S3]
- Frequentist mode: A Frequentist Analysis mode exists as a reporting/statistics option [S4]
- Frequentist mode available: yes · Bayesian [S3]
- Frequentist p value no direction color: significance only · no · Confidence Interval [S3]
- Frequentist same metrics: yes · yes [S3]
- Frequentist scope option: current campaign only · yes [S3]
- Frequentist significance threshold: uplift >95, loss <5 · 0.05 [S3]
- Frequentist visual aids: potential learnings · no learnings [S3]
- Hit tracking: The SDK supports sending event tracking hits from the client [S7]
- Http only cookie note: AB Tasty tag cannot access, read or modify HTTP-Only cookies; target non-HTTP-only cookies for privacy settings [S5]
- Hypothesis field: yes [S1]
- Impact dashboard: An Impact dashboard exists under Reporting & Performances [S4]
- Loading method selection: yes [S1]
- Local storage purpose: Local storage records navigation history: viewed pages, transactions, events, segments [S5]
- Multiple daily exports: yes [S10]
- Multivariate combination formula: variations of 1st subtest * number of subtests [S2]
- Multivariate subtests: unlimited · 1 [S2]
- Multivariate test definition: Multivariate tests change several elements simultaneously and identify the best-performing combination [S2]
- Multivariate traffic requirement: more subtests require more traffic; readiness and data reliability take more time than a classic A/B test [S2]
- Nextjs example: The SSR integration example uses the Next.js framework [S7]
- Nps report: An NPS report is available in reporting [S4]
- Optout mechanism: Opt-out via #abtastyoptout=1 URL parameter, stored in an opt-out cookie [S5]
- Payload syntax check: yes [S10]
- Primary goal: yes [S1]
- Qa capabilities: targeting configuration · tracking · modifications [S1]
- Qa step available: targeting configuration · tracking · modifications [S2]
- Quota cost tools: yes [S10]
- React sdk: Integration uses the Flagship React SDK package @flagship.io/react-sdk [S7]
- Refresh on demand: Reporting data can be refreshed manually via a Refresh On Demand feature [S4]
- Sample ratio mismatch: Sample ratio mismatch is addressed in the reporting documentation [S4]
- Scheduling: yes · yes [S1]
- Scheduling available: yes [S2]
- Secure cookies default: no [S5]
- Secure cookies option: Secure cookies option restricts cookies to HTTPS pages; disabled by default [S5]
- Sequential testing: detect experiments unlikely to succeed · yes · Conversion/Transaction Rate [S1]
- Session storage purpose: Session storage keeps temporary data from external services such as geolocation, weather information, user agent [S5]
- Ssr flag fetch: On each SSR page request, flags targeting the visitor are fetched server-side and passed as props to avoid flicker [S7]
- Ssr integration: Flagship provides a documented server-side rendering (SSR) integration to avoid flicker [S7]
- Storage migration: Switching between Cookie and Local Storage triggers automatic data migration [S5]
- Storage options: Cookie · Cookie · Local Storage [S5]
- Tag consent delegation: Consent can be delegated to the AB Tasty tag, which checks consent before tracking [S5]
- Targeting logic: Targeting evaluates user context with AND/OR statements [S8]
- Targeting options: where (pages) · for whom (audience) · which conditions · when (recurrence) [S1]
- Targeting replicate option: Replicate targeting option copies Who, How, Where configuration across sub-tests [S2]
- Technical cookies: Technical cookies (e.g. ABTastyDomainTest) validate operability, store no visitor data, lifetime a few milliseconds [S5]
- Third party tool integration: yes [S1]
- Third party tool integration: yes [S2]
- Tms consent option: Consent can be managed in a third-party tool such as a TMS; proof of consent still collected [S5]
- Tracker status monitoring: Tracker status monitoring is part of Reporting & Performances [S4]
- Variation assignment spectrum: VisitorID is projected onto a 0-99 integer spectrum to compute variation assignment by traffic allocation [S8]
- Visitor cookie: Visitor ID is persisted in a cookie named fs_visitorID_cookie [S7]

## Questions

### Is AB Tasty European?

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

### Where does AB Tasty store data?

Not stated on the vendor’s pages as of 13 Oct 2026.

### Does AB Tasty have a free plan?

Not stated on the vendor’s pages as of 13 Oct 2026.

### What are the best alternatives to AB Tasty?

As of 21 Oct 2026, the panel rates [GrowthBook (3.5/5)](https://whats-best.ai/software/conversion-optimization/growthbook), [Convert Experiences (3.5/5)](https://whats-best.ai/software/conversion-optimization/convert-experiences) and [Webtrends Optimize (3/5)](https://whats-best.ai/software/conversion-optimization/webtrends-optimize) highest among the other 31 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 [Webtrends Optimize](https://whats-best.ai/software/conversion-optimization/webtrends-optimize) (UK / wider Europe). Ratings are the AI panel’s opinion, formed from public evidence: [how scores are made](https://whats-best.ai/methodology#ordering). The full list, with European products first: [AB Tasty alternatives](https://whats-best.ai/software/conversion-optimization/ab-tasty/alternatives).

## What this page leaves out

- 11 product facts could not be confirmed on the vendor’s page as captured and were left out of this page and of the panel’s material.
- 1 compliance fact could not be confirmed on the vendor’s page as captured and was left out of this page and of the panel’s material.
- 1 hosting fact could not be confirmed on the vendor’s page as captured and was left out of this page and of the panel’s material.
- 1 support fact could not be confirmed on the vendor’s page as captured and was left out of this page and of the panel’s material.
- 6 of the readings below were written against an earlier fact sheet — a fact has been corrected, added or pulled since. Until the panel next runs on this product you are reading the older judgement.

## Sources

- [S1] Experiment types & delivery — found from sitemap: https://docs.abtasty.com/web-experimentation-and-personalization/campaign-creation-and-dashboard/how-to-create-a-campaign/experimentations/how-to-create-an-ab-test (checked 2026-10-13)
- [S2] Experiment types & delivery — found from sitemap: https://docs.abtasty.com/web-experimentation-and-personalization/campaign-creation-and-dashboard/how-to-create-a-campaign/experimentations/how-to-create-a-multivariate-test (checked 2026-10-13)
- [S3] Statistical method & guardrails — found from sitemap: https://docs.abtasty.com/reporting-and-performances/reporting/frequentist-analysis-mode (checked 2026-10-13)
- [S4] Statistical method & guardrails — found from sitemap: https://docs.abtasty.com/reporting-and-performances/reporting/understand-the-statistics-behind-your-reports (checked 2026-10-13)
- [S5] Consent & visitor tracking — found from sitemap: https://docs.abtasty.com/account/performance-and-security/consent-policy---cookies-storage-and-privacy (checked 2026-10-13)
- [S6] Consent & visitor tracking — found from sitemap: https://docs.abtasty.com/account/tag-integration/understand-ab-tasty-tag-implementation-methods/about-cookies-tracking (checked 2026-10-13)
- [S7] Snippet performance & flicker — found from sitemap: https://docs.abtasty.com/server-side/concepts/jamstack/avoid-flickering-with-nextjs-ssr (checked 2026-10-13)
- [S8] Snippet performance & flicker — found from sitemap: https://docs.abtasty.com/server-side/concepts/bucketing (checked 2026-10-13)
- [S9] Analytics, data export & integrations — found from sitemap: https://docs.abtasty.com/integrations/custom-integrations/ab-tasty-public-api (checked 2026-10-13)
- [S10] Analytics, data export & integrations — found from sitemap: https://docs.abtasty.com/integrations/other-integrations/data-warehouse/data-warehouse-integrations-general-information (checked 2026-10-13)

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Cite as: whats-best.ai, "AB Tasty — Conversion Optimization", AI panel analysis, as of 2026-10-21. https://whats-best.ai/software/conversion-optimization/ab-tasty

Corrections: https://whats-best.ai/correct/438?target=page