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Experimentation

CRO & Experimentation Program

Turn your visits into measurable growth

Deploy a continuous experimentation program: identify the friction points in your journeys, validate your hypotheses with data and maximize your conversion rates.

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

« I want to continuously experiment on my site: test more, learn faster and embed a testing culture within my teams. »
  • « I want to set up a CRO program »
  • « I want to industrialize my A/B tests »
  • « I want to stop deciding by feeling »
  • « I want to prove the ROI of my optimizations »

Our response

  • Funnel and data audit, prioritized hypotheses
  • Design, development, QA and test launch
  • Analysis, iteration and capitalisation

Use cases covered

  • Product Discovery
  • CRO Coaching
  • Maturity audit
  • Roadmap facilitation

Why now

Constant media budget, more expensive traffic: conversion absorbs the increase

Illustration of the principle in base 100 index, without client data.

At a constant budget, every increase in cost per visitor drives up the acquisition cost. Converting more of the visitors already paid for brings it back down, without spending an extra euro on media.

CAC =Cost per visitor÷ Conversion rate

  • Media budget, constant
  • Acquisition cost at constant conversion rate
  • Acquisition cost with conversion optimization

The principle

Experimentation validates what improves the experience and discards what degrades it

Illustration of the principle, without client data.

Each column is a test. Winning changes stack up and raise the experience; neutral or negative tests stay below the line and are not deployed.

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

Method

Our method in 5 steps

Our stance

RICE prioritization

Each opportunity is scored Reach × Impact × Confidence × Effort to maximize the program's ROI.

  • R
  • I
  • C
  • E
Talk to an expert
  1. Step 01 : Audit & diagnosis

    Combining your GA4 and Contentsquare data with an in-depth UX analysis to map out the prioritized friction points on your funnel.

    • Cross-analysis of GA4, Contentsquare and UX
    • Prioritized map of funnel friction points
    • Review of past tests and learnings
    • Conversion KPI baseline
  2. Step 02 : Hypotheses

    Creation of an optimization backlog based on observed behaviors and drafting of sheets detailing your targets, your KPIs and the mechanics of each test.

    • Backlog based on data and behaviors
    • Fact sheets: target, KPI, mechanics
    • Mapping to sourced friction points
    • Peer cross-review
  3. Step 03 : RICE prioritization

    Scoring of your opportunities using the Reach, Impact, Confidence and Effort model to validate a quarterly experimentation roadmap.

    • Reach, Impact, Confidence, Effort scoring
    • Validated quarterly roadmap
    • Development and feasibility assessment
    • Sequencing by page and by audience
  4. Step 04 : Test & deployment

    Design conception, development of variations and strict QA across all your devices as well as your tracking plan.

    • Design and development of the variation
    • Cross-device QA and tracking QA
    • Calculation of required duration and traffic
    • Launch and live monitoring
  5. Step 05 : Analysis & iteration

    Statistical reading of results, analysis of your segments and recommendations to integrate, iterate or abandon each variation.

    • Statistical reading: significance and segments
    • Recommendation: integrate, iterate or abandon
    • Capitalization in a learnings database
    • Communication of results

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

  • Salomon

    In response to strong acceleration and internal transformation, we established a partnership with Welyft to evolve our CRO experimentation program. Their expertise helps us increase our execution speed and scale through hybrid technical and organizational support. This hybrid support is a true lever for strengthening collaboration between IT and business.

    • CRO Organization
    • Tool : Dynamic Yield

    Margaux Motta

    E-commerce Performance Merchandiser

  • Oh My Cream!

    Very high-quality support, both in the materials and the advice provided, which helped us get back into a good dynamic. The expertise and availability of the teams is a real plus!

    • Product page
    • Tool : AB Tasty

    Keridwen Pierret

    E-commerce & digital projects manager

    Read the client success story

Conversion Intelligence

Our experts, backed by a fleet of AI agents

Sur cette offre, nos experts s'appuient sur les agents de la flotte Conversion Intelligence : les agents préparent, l'expert décide.

  • The offer's agents

    Mei, 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.

  • Synthetic Users · powered by Mei

    Four psychological profiles review your page

    The Demanding One, the Novice, the Hurried One and the Skeptic browse a product page; Mei sorts their reactions into pain points.

  • 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

  • Opportunities report

    Friction points and hypotheses prioritized using RICE.

  • Test roadmap

    Hypotheses, KPIs and platform, validated before development.

  • Test reports & dashboard

    Reliable results, actionable recommendations.

  • Learnings base

    Capitalized and reusable learnings.

Who is it for?

Who is this offer for?

Tools used

  • AB Tasty
  • Kameleoon
  • Dynamic Yield
  • VWO
  • Optimizely
  • Statsig
  • E-commerce or DNVB with established traffic
  • Digital or growth team with an A/B testing tool in place
  • Sponsor: Head of E-com, CRO Manager, CMO

To go further

Articles by our experts related to this offer.

All our articles

To go further

Often associated with

Experimentation

CRO audit

Find what's holding back your conversions

  • GA4
  • Piano
  • Contentsquare
  • and 2 other tools

Data & Analytics

Sanity Check Tracking

Make your tracking reliable before deciding

  • GA4
  • GTM
  • Piano
  • and 2 other tools

Experimentation

CRO maturity & organization audit

Structure your CRO organization

Start by knowing where you stand.

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