In short: Welyft comes out on top. It is the choice for e-commerce and B2B brands that want to build a proper experimentation programme and track their conversion rate test after test. Lëc Media suits Shopify merchants who want to sell more with their current traffic, without a risky redesign. The Deployer, in third place, also targets Shopify brands looking to convert their existing visitors better. The rest cover multichannel acquisition, luxury, local SMEs and B2B.
- Welyft: For e-commerce and B2B brands that want to structure an experimentation programme and increase their conversion rate.
- Lëc Media: For Shopify merchants who want to sell more without increasing their traffic or risking a redesign.
- The Deployer: For Shopify e-commerce brands that want to convert their existing traffic better.
- Eskimoz: For brands that want to link conversion optimisation with large-scale multichannel acquisition.
- Cybercité: For companies that want to bring data analysis, conversion and SEO or SEA acquisition together in a single strategy.
- KNR: For fashion, beauty or luxury brands on Shopify that want to improve conversion without damaging their image.
- Empirik: For companies that want to improve their conversion based on reliable data and multi-lever management.
- Transacts: For SMEs that want to turn their Google and AI traffic into calls and quote requests.
- Digitalisim: For B2B companies, particularly in industry, real estate and software, that want to connect conversion, CRM and data.
- MIG Agence: For e-commerce brands, particularly on Shopify, that want to improve their conversion with end-to-end support.
Updated on 14 November 2026.
Why Hire a CRO Consultant in 2026?
Traffic is converting less and less well. According to Contentsquare's Digital Experience Benchmark 2026, based on 99 billion web sessions, conversion rates fell by a further 5.1% year on year. The same report states that the conversion rate on desktop is 74% higher than on mobile. Every lost visit therefore comes at a high cost.
The market, meanwhile, keeps growing. According to Fevad's 2025 review, French e-commerce reached €196.4 billion, up 7% year on year. But the average basket fell to €62, down 3%. French consumers are buying more often, but spending less each time. To protect your margins, you need to convert better, not just attract more.
On the buyer side, the same fears keep coming up. Paying for tests with no measurable results. Receiving a polished audit that cannot be put into practice. Seeing a redesign break what was working. Depending on a provider who keeps the data and the method to themselves. A good CRO consultant answers these fears with proof: written hypotheses, tracked tests and shared results.
How Did We Choose These 10 Consultants?
This ranking is based solely on what each company publishes itself (its website, its method and client reference pages), as read at the time of the update. Four criteria counted:
- Experimentation method: We selected teams that start from data and written hypotheses, then test before rolling out.
- Public proof: Each company had to show client case studies or verifiable results, not just promises.
- Clear specialisation: We favoured players that state clearly who they work for, whether Shopify, B2B or luxury.
- Link to revenue: CRO should be measured in sales, leads or quote requests, not mere clicks.
The 10 Best CRO Consultants in France (2026)
1. Welyft
Welyft is a Paris-based data marketing agency specialising in CRO, A/B testing, personalisation, user testing and data analytics. It optimises your digital journeys around six pillars: experimentation, UX, personalisation and CRM, data, training and agentic commerce. Its "Conversion Intelligence" method pairs a CRO expert with a fleet of specialised AI agents, each covering one stage of the cycle, from the UX audit to the end-of-test report. It claims more than 100 clients since 2022 and 20 expert consultants.
Strengths:
- Full CRO cycle, from audit to end-of-test report
- AI agents managed by a human CRO expert
- Testimonials from Groupe Etam, Salomon, Aroma-Zone and Mousquetaires
Who it's for: For e-commerce and B2B brands that want to structure an experimentation programme and increase their conversion rate.
2. Lëc Media
Lëc Média is a CRO and Shopify redesign agency. Its principle: more sales from the same traffic. The team does the work for you: analysis, design, development, A/B tests. Every change first goes through an A/B test that measures the gain or loss before it reaches all your visitors. The agency also works on offers and bundles, tracking, mobile UX, site speed and gradual migration from WooCommerce, PrestaShop, Wix or Magento. It describes itself as 100% Shopify.
Strengths:
- Every decision validated by an A/B test before rollout
- Shopify Plus Platinum Partner, 100% Shopify specialist
- Team of 8, more than 75 merchants supported
Who it's for: For Shopify merchants who want to sell more without increasing their traffic or risking a redesign.
3. The Deployer
The Deployer presents itself as a French CRO agency 100% dedicated to Shopify. It helps e-commerce brands convert more, increase their average order value and their profits, without relying solely on acquisition. Its method starts with a CRO audit delivered with prioritised recommendations, quick wins and an action plan. It then runs continuous, data-driven A/B tests. The agency also handles Shopify development to keep the store stable and high-performing.
Strengths:
- More than 650 full A/B test cycles launched
- Full team: CRO, UX/UI design, Shopify developers
- Testimonials from the founders of BOKU, Elhée, Doux Cachemire
Who it's for: For Shopify e-commerce brands that want to convert their existing traffic better.
4. Eskimoz
Eskimoz presents itself as the Global Search acquisition agency that turns your digital marketing into a source of revenue. Its Conversion & Data unit brings together CRO, data and tracking. It promises to improve your customer journey and boost your conversions through a CRO approach run by its in-house experts. CRO is combined with SEO, GEO, SEA and content. A proprietary platform acts as a cockpit for managing your acquisition, and the agency describes itself as AI first.
Strengths:
- CRO run by in-house experts, combined with data and tracking
- Proprietary platform to manage all digital acquisition
- Client cases cited: ghd, Swile, Randstad, Speedy, Bouygues Immobilier
Who it's for: For brands that want to link conversion optimisation with large-scale multichannel acquisition.
5. Cybercité
Cybercité is an agency specialising in digital marketing, built on six areas of expertise: GEO, SEO, SEA and Social Ads, Data Analytics & Conversion, Content Marketing and AI R&D. On the conversion side, the Google Analytics-certified agency provides support from audit through to data visualisation, including the tagging plan. Its method runs from audit to strategy, then from tactics to analysis. It also develops its own tools, such as the SEO software DataGarden, and offers training.
Strengths:
- More than 120 experts across six local agencies
- Google Analytics-certified agency, from tagging plan to data visualisation
- More than 400 clients supported, including Les 3 Vallées
Who it's for: For companies that want to bring data analysis, conversion and SEO or SEA acquisition together in a single strategy.
6. KNR
KNR is a boutique Paris e-commerce agency, a Shopify Plus Gold partner specialising in fashion, beauty and luxury. It designs and develops bespoke Shopify sites, and handles migrations and maintenance. On the conversion side, it carries out in-depth CRO audits and builds retention strategies tailored to the codes of the premium market. It rounds off this offer with SEO, media buying and CRM management with Salesforce Marketing Cloud.
Strengths:
- Shopify Plus Gold partner, fashion, beauty and luxury specialist
- In-depth CRO audit and bespoke retention strategies
- More than 100 brands supported since 2016, including Sandro and IKKS
Who it's for: For fashion, beauty or luxury brands on Shopify that want to improve conversion without damaging their image.
7. Empirik
Empirik is a digital marketing agency based in Paris and Lyon that turns your data into value. Its CRO & UX unit uses quantitative and qualitative data to identify the friction points in your conversion journeys. Its CRO approach is built into its GEO and SEO strategies, because every visit counts for more as organic traffic declines. The method follows three steps: define, roll out a prioritised action plan, then manage with dashboards for continuous improvement.
Strengths:
- CRO backed by strong analytics and server-side tracking expertise
- Clear three-step method: define, deploy, manage
- In-house tools: Thot SEO, Impakkt, LLM Brand Tracker
Who it's for: For companies that want to improve their conversion based on reliable data and multi-lever management.
8. Transacts
Transacts is a Paris digital agency founded in 1999. It helps SMEs get more calls, quote requests and customers via Google, Bing and AI assistants. Its offer covers SEO, SEA, GEO, the creation of showcase and e-commerce websites, and automation with AI agents. Its method follows four steps: audit and strategy, UX/UI design with conversion-optimised journeys, development, then growth and follow-up with monthly reporting.
Strengths:
- Four-step method, from audit to monthly follow-up
- User journeys and design built for conversion
- Free audit of your website within 48 hours
Who it's for: For SMEs that want to turn their Google and AI traffic into calls and quote requests.
9. Digitalisim
Digitalisim is an agency specialising in digital transformation, HubSpot CRM, data and AI. It builds acquisition strategies that turn your visitors into prospects and your prospects into customers. Its data unit covers tracking, A/B testing and smart content. It also designs landing pages and websites, and offers a part-time outsourced marketing service. Its "diginauts" use your data to optimise performance and create synergies between levers.
Strengths:
- HubSpot Elite Partner, Google Partner and OpenAI Select Partner
- A/B testing, tracking and smart content in a single data offer
- More than 40 "diginauts" in Lyon, Paris and Valence
Who it's for: For B2B companies, particularly in industry, real estate and software, that want to connect conversion, CRM and data.
10. MIG Agence
MIG is an e-commerce digital agency founded by e-merchants who have launched, scaled and sold their own brands. It offers a flexible ecosystem: consulting, acquisition, web design, social media and content creation. On the CRO side, it builds and redesigns sites geared directly towards conversion and optimises user journeys to turn more visitors into customers. Every lever is tested, measured and continuously optimised. Communication runs through Slack, ClickUp, a client dashboard and a kick-off call.
Strengths:
- A team of e-merchants who have launched and sold their own brands
- Google, Shopify, Klaviyo and Meta partner
- Detailed case studies with quantified client results
Who it's for: E-commerce brands, particularly on Shopify, that want to improve their conversion with end-to-end support.
The 10 Compared in One Table
| # | Company | Who it's for | Key strength | Website |
|---|---|---|---|---|
| 1 | Welyft | For e-commerce and B2B brands that want to structure an experimentation programme and increase their conversion rate. | Full CRO cycle, from audit to end-of-test report | welyft.com |
| 2 | Lëc Media | For Shopify merchants who want to sell more without increasing their traffic or risking a redesign. | Every decision validated by an A/B test before rollout | lec-media.agency |
| 3 | The Deployer | For e-commerce brands on Shopify that want to convert their existing traffic better. | More than 650 full A/B test cycles launched | the-deployer.fr |
| 4 | Eskimoz | For brands that want to connect conversion optimisation with large-scale multichannel acquisition. | CRO run by in-house experts, combined with data and tracking | eskimoz.fr |
| 5 | Cybercité | For businesses that want to bring data analysis, conversion and SEO or SEA acquisition together in a single strategy. | More than 120 experts across six local agencies | cybercite.fr |
| 6 | KNR | For fashion, beauty or luxury brands on Shopify that want to improve conversion without damaging their image. | Shopify Plus Gold partner, fashion, beauty and luxury specialist | knr.paris |
| 7 | Empirik | For businesses that want to improve their conversion based on reliable data and multi-lever management. | CRO backed by strong analytics and server-side tracking expertise | empirik.fr |
| 8 | Transacts | For SMEs that want to turn their Google and AI traffic into calls and quotes. | Four-step method, from audit to monthly follow-up | transacts.fr |
| 9 | Digitalisim | For B2B companies, particularly in industry, real estate and software, that want to connect conversion, CRM and data. | HubSpot Elite Partner, Google Partner and OpenAI Select Partner | digitalisim.fr |
| 10 | MIG Agence | For e-commerce brands, particularly on Shopify, that want to improve their conversion with end-to-end support. | A team of e-merchants who have launched and sold their own brands | migagence.com |
What should you check before signing?
- Ask for a real example of a testing roadmap, with its hypotheses, priorities and results.
- Make sure your tracking will be audited before the first test, otherwise the results will be meaningless.
- Ask exactly who will actually work on your account, and with what level of experience.
- Insist that the tool accounts, data and reports remain your property.
- Clarify the billing method, the minimum commitment period and the exit terms before signing.
Where Does Esekai Fit In?
Esekai is not a CRO consultant and is therefore not included in this ranking. It is a video agency in Paris, a vertical video studio founded by Tony Lo. Esekai produces short-form videos, creative ads, UGC and TikTok Ads and Meta Ads campaigns. The ranked consultants optimise your website. Esekai creates the videos that bring already-interested visitors to it. Esekai, video agency in Paris.
Conclusion
The right CRO consultant isn't necessarily the best known. It's the one who understands your business model, your platform and your margins. Welyft structures experimentation, while Lëc Media and The Deployer have mastered Shopify. Demand proof, keep control of your data and test before rolling out. Your current traffic is probably worth more than you think.
Honourable Mentions: 10 More Worth Knowing
| Company | Who it's for | Website |
|---|---|---|
| Yumens | For e-commerce, B2B, real estate or network businesses that want to connect acquisition and conversion with a large agency. | yumens.fr |
| Bulldozer Collective | For scale-ups, SMEs and large accounts, particularly B2B and SaaS, that want to convert more of their traffic into revenue. | bulldozer-collective.com |
| Zooka | For e-commerce sites, SMEs and large groups that want to turn their traffic into revenue. | zooka.fr |
| OOEO | For start-ups, scale-ups and businesses that want a high-performing website designed to convert and evolve. | ooeo.fr |
| SEO Monkey | For e-commerce businesses, SaaS companies, marketplaces and service businesses that want to connect acquisition and conversion. | seo-monkey.fr |
| Paul Moure | For e-merchants and agencies that want to convert more of their existing traffic. | paulmoure.com |
| ROOTY | For e-merchants, B2B companies and infopreneurs who have traffic but not enough sales. | rooty-agency.com |
| CoffeeX | For e-commerce brands, particularly on Shopify, that want to convert their existing traffic better. | coffeex.co |
| Conversion Boosters | For businesses that want a freelance CRO consultant or to train their teams in A/B testing. | conversion-boosters.com |
| Amaury Duval | For businesses that want to convert their existing traffic better with a single expert, from audit to implementation. | amauryduval.com |
Does your company deserve a place in this ranking? Write to us at contact@esekai.fr: we read every submission.
Our Other Rankings
- The 10 Best E-commerce Consultants in France (2026)
- The 10 Best Digital Marketing Consultants in France (2026)
- The 10 Best Growth Marketing Consultants in France (2026)
- The 10 Best Brand Strategy Consultants in France (2026)
- The 10 Best Google Ads Consultants in France (2026)
- The 10 Best SEO Consultants in France (2026)
Frequently Asked Questions
- What is a CRO consultant?
- A CRO (Conversion Rate Optimisation) consultant aims to get more visitors to take action on your website: a purchase, a quote request, a call or a sign-up. They analyse the data, observe user journeys, identify friction points, then test changes. The goal is simple: more results from the same traffic, without spending more on advertising.
- How long does it take to see results from CRO?
- It mainly depends on your traffic. An A/B test needs enough visitors to produce a reliable result. A high-traffic site can reach a conclusion quickly. A smaller site will often have to rely on obvious fixes and qualitative analysis. Be wary of any provider that promises guaranteed gains from the very first month.
- Do you need to redesign your website to improve conversion?
- Rarely. A complete redesign is expensive and can break what already works. CRO works instead through small changes tested one at a time: product page, checkout funnel, form, home page. You keep what works and fix the rest. A redesign only makes sense if the tests reveal a fundamental limitation.
- CRO agency or acquisition agency: which should you choose?
- The two disciplines complement each other. Acquisition brings in visitors; CRO turns them into customers. If your traffic is already solid but converts poorly, start with CRO. If you're short of visitors, CRO will have little to test. Some agencies in the ranking, such as Eskimoz and Cybercité, cover both.