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Experimentation

A/B Testing Execution

Multiply your tests in production

Entrust us with the development, quality control and deployment of your A/B tests, and free up your tech teams.

They trust us+70 clients

  • L'Oréal
  • Canal+
  • Sephora
  • Chaumet
  • Renault Group
  • Salomon
  • TAG Heuer
  • Etam
  • Shiseido
  • Yves Rocher
  • Byredo
  • Jardiland
  • Hiscox
  • Fursac
  • Cegid
  • Bricomarché
  • Gamm vert
  • agnès b.
  • A.P.C.
  • Monte-Carlo Société des Bains de Mer
  • RAJA
  • Mouratoglou Academy
  • Alptis
  • OGF

The need

What you tell us

« My teams define the tests, but I don't have the bandwidth to develop, QA and properly analyse them. I want to delegate execution while keeping control over strategy. »
  • « I want to delegate the execution of my tests »
  • « I want to test without mobilizing my devs »
  • « I want reliable QA on my tests »
  • « I want clean test reports »

Our response

  • No-code setup or variation development
  • Cross-device QA and tracking QA
  • Monitoring and analysis of results

The principle

Every winning test raises the experience up a notch

Illustration of the principle, without client data.

We design, develop and launch the tests; only validated improvements go into production, the others remain below the line.

  • Évolution validée et déployée
  • Évolution sans effet significatif
  • Évolution négative, non déployée

Method

Our method in 5 steps

Our stance

Controlled scope

We handle the test, from receiving the brief to the analysis. Ideation, hypotheses and strategy remain with you.

  • Setup
  • QA
  • Analysis
Talk to an expert
  1. Step 01 : Reception

    Analysis of your test brief and complete technical scoping to prepare integration into your environment.

    • Test brief defined by your teams
    • Technical scoping of the setup
    • Workload estimate and schedule
    • Tracking plan validation
  2. Step 02 : Setup

    Development of the variation or custom no-code and direct integration into your A/B testing tool.

    • No-code or development of the variation
    • Integration into Dynamic Yield or your A/B tool
    • Reversible code with cleanup
    • Goal tracking connected
  3. Step 03 : QA

    Rigorous testing across all devices and systematic verification of event tracking in your tracking plan.

    • Cross-device and cross-browser QA
    • QA of the tracking plan
    • Anti-flickering and performance checks
    • Targeting and split validation
  4. Step 04 : Go-live

    Test launch with traffic allocation and live monitoring to ensure experience stability.

    • Launch and traffic distribution
    • Live monitoring of metrics
    • Sample ratio check (SRM)
    • Alert in case of anomaly
  5. Step 05 : Analysis

    Statistical reading of performance results at the end of the test and delivery of a backlog of concrete, actionable recommendations.

    • Rigorous statistical analysis
    • Report and recommendation
    • Documented learnings
    • Clean test archiving

Customer reviews

Ce qu'en disent nos clients

  • Groupement Mousquetaires

    We have been collaborating with Welyft for almost 2 years now and their main strength… is adaptability! Data expertise that I never question, a great ability to come up with proposals to always meet the needs of our group, and above all unfailing availability! From thinking/strategy to help with technical implementation, they help us every day to develop experimentation and CRO for the Bricomarché stores

    • CRO
    • Tool : ABTasty

    Marie Devanne

    UX and Customer Journey Manager

  • Aroma-Zone

    We particularly appreciated our collaboration with Welyft. The team combines professionalism, availability and a strong solution-oriented approach. Communication is simple, transparent and efficient, even during the more complex phases of the project. A smooth and constructive collaboration that we highly recommend.

    • CRO
    • Tool : Dynamic Yield

    Margaux Genevey

    E-merchandising Manager

Conversion Intelligence

Our experts, backed by a fleet of AI agents

Deux modes d'exécution, selon la complexité du test. En mode agentique, Amir décline votre brief en variantes, Iris les code sur votre outil A/B et les recette sur tous les écrans, puis un consultant tech valide avant la mise en ligne. Pour les tests complexes et les refontes de parcours, nos développeurs partenaires, experts de chaque plateforme, prennent le développement en main. Dans les deux cas, Victor suit le test en ligne et prépare le rapport.

  • The offer's agents

    Amir, Iris and Victor at work

    One stage of the CRO cycle each: what the agent does, what it is trained on, what it delivers, and what the expert decides.

  • Agents on a daily basis

    Describe the need, Claude calls the agent

    A request in plain language or a "/" command: the right agent takes over, you keep the decision.

  • Architecture and fleet

    A CRO architect manages a fleet of agents

    The same CRO process, with and without agents: each agent takes over, the waiting disappears and the learning loop speeds up.

Deployment

Agents trained like experts, updated like products.

Each agent is a versioned plugin on GitHub. Three ways to make the most of it.

During a mission

During the engagement

Our consultants call on the agents at every stage of the CRO cycle. You receive the deliverables, without installing anything.

Via the Welyft platform

Remote, at Welyft

The fleet runs on our platform, connected to your tools with your consent. An expert validates every deliverable.

Internalized within your organization

Within your organization

We build your agents using our method, customize them, then a GitHub plugin marketplace delivers their updates.

Deliverables

What you get

  • Variation developed & tested

    Ready to go live.

  • Verified tracking plan

    Reliable data from launch.

  • Test report

    Statistical results and recommendation.

  • Continuous monitoring

    Anomalies reported in real time.

Who is it for?

Who is this offer for?

Tools used

  • AB Tasty
  • Kameleoon
  • Dynamic Yield
  • VWO
  • GA4
  • Piano
  • Brand with a CRO or growth team but no execution bandwidth
  • Context: high test cadence, no-code or development
  • Sponsor: CRO Manager, Head of E-com

To go further

Articles by our experts related to this offer.

All our articles

To go further

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Make your tracking reliable before deciding

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Training

Data & CRO Training

Make your teams autonomous on data

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Start by knowing where you stand.

Measure your maturity in a few minutes, or speak directly to an expert.