Competition in the French digital market is intense. The cost of attracting new visitors is rising across all industries, while user attention is dwindling. Whether you're an online shop, software provider, or lead generator, traffic alone is no longer enough to guarantee success.
The real profit margin lies in optimizing your existing visitors. Conversion rate optimization (CRO) is not a luxury, but the basis for profitable growth.
But which experts have mastered the interplay between French psychology and precise data technology?
We analyzed the best CRO agencies in France that generate real results such as demo requests, leads, or sales from anonymous visitors.
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Why a CRO agency accelerates your growth
Specialized CRO agencies support companies in basing digital decisions on reliable data rather than gut feeling. Structured analyses, clearly formulated hypotheses and controlled tests allow optimization measures to be evaluated and prioritized in a targeted manner.
The added value lies not only in higher conversion rates, but also in better decision bases, more stable funnels and a continuous improvement of central user interactions - regardless of additional budget.
The top CRO agencies in France in 2026
In this overview, we present selected CRO agencies from France. The selection covers various areas of focus, such as UX-driven optimization, data-driven testing, and analytics and enablement approaches.
The following agencies are listed in alphabetical order and do not represent an explicit ranking.
Bluebagels is a French CRO agency specializing in data-driven conversion optimization across the entire funnel. The focus is on sustainable performance improvement through in-depth UX analysis, systematic testing, and well-thought-out funnel strategies—from the ad to checkout.
The agency combines qualitative user research with A/B testing to identify bottlenecks in the purchasing process and eliminate them in a targeted manner. Each test is understood as a hypothesis-driven business decision. No trial and error, but measurable optimization with real impact. Bluebagels prefers to work with growth-oriented e-commerce and DTC brands that pursue specific sales targets.
Focus of the services:
- Conversion optimization based on UX research and funnel analysis
- Development and implementation of A/B and multivariate tests
- Design and optimization of landing pages for better conversion rates
- Paid Ads Services with a focus on funnel performance and campaign profitability
- Full-funnel strategies for cross-channel conversion growth
- Workshops and CRO coaching for internal teams
Highlights:
According to Bluebagels, it has already carried out over 5000 A/B tests and optimized more than 100 million $ in sales. On average, customers achieve conversion uplifts of 20 to 50 % through data-based funnel optimization - supported by structured test processes, sound UX analyses and clear hypotheses along the entire purchasing process.
Benefit from the ideal combination of Varify.io® technologies and agency expertise.
Converteo is one of France's leading agencies in the field of digital performance. It specializes in conversion optimization, data-driven analysis, and technology-supported marketing decisions. The agency combines technical expertise with strategic depth and operational implementation strength. Its focus is on better decisions based on data, more efficient funnels, and more profitable customer journeys.
Focus of the services:
- Conversion optimization through structured A/B testing and UX audits
- Data strategy & analytics architectures for improving decision quality
- AI-based tools for personalization, forecasting, and attribution
- E-commerce optimization along the entire conversion funnel
- Omnichannel analysis & performance measurement of cross-channel customer journeys
- Marketing mix modeling & media budget optimization
- Support with tool selection and implementation (tag management, CDP, testing suites)
Highlights:
Converteo combines data-driven consulting with conversion optimization at enterprise level. The CRO approach is based on clean tracking architecture, structured testing frameworks and clear governance in order to implement optimizations along complete customer journeys. The model is supported by an internal team of over 400 consultants and experts for data, tech, UX and marketing.
A key differentiating factor is the strong focus on AI-supported decision-making models. Converteo uses AI for attribution, forecasting, segmentation and marketing mix analyses, among other things, and supports companies in strategically scaling conversion potential, especially in complex e-commerce and omnichannel setups.
Benefit from the ideal combination of Varify.io® technologies and agency expertise.
Dékuple is an international marketing and data group focusing on customer acquisition, activation, and retention. The focus is on data-driven marketing strategies that help companies target users throughout the entire customer lifecycle, from new customer acquisition to long-term loyalty.
Focus of the services:
- Data-driven customer acquisition & digital prospecting
- Conversion-oriented activation of existing customers
- Development and optimization of CRM and loyalty programs
- Performance marketing & online presence optimization
- Omnichannel marketing strategies for B2C and B2B companies
- Marketing automation and personalization based on customer data
Highlights:
Dékuple pursues a clear lifecycle approach and combines acquisition, conversion and customer loyalty into an end-to-end marketing model. The focus is on data-based activation and loyalty mechanisms instead of isolated CRO measures. As an international group, Dékuple unites numerous specialized agencies and expert teams under one roof, covering a broad spectrum from performance marketing to CRM and omnichannel strategies.
Benefit from the ideal combination of Varify.io® technologies and agency expertise.
Elevate is an agency specializing in conversion optimization and digital analytics. The focus is on analyzing digital user paths and optimizing key conversion routes based on accurately collected data.
The agency works with structured CRO frameworks that combine UX analyses, A/B testing, and analytics setups. The goal is to create a solid basis for decision-making for continuous optimization—especially for websites and digital platforms with clearly defined conversion goals.
Focus of the services:
- Conversion rate optimization (CRO) based on structured test programs
- UX analyses and identification of conversion barriers
- A/B testing and experiment design
- Digital analytics and tracking concepts
- Performance measurement and data-based decision-making
- Support with analytics setups and KPI frameworks
Highlights:
Elevate clearly positions CRO as an analytical discipline. Conversion optimization is based on clean tracking, sound analysis, and structured experiments, not on isolated design adjustments or short-term measures.
A key component is the close integration of digital analytics and testing. Elevate supports companies in establishing robust data bases and systematically using them to make optimization decisions along important user paths.
Benefit from the ideal combination of Varify.io® technologies and agency expertise.
Optimize Matter is an agency specializing in conversion optimization, digital analytics, and marketing technologies. The focus is on data-driven analysis of digital platforms and the optimization of conversion paths through structured testing and analysis processes.
The agency works closely at the interface between CRO, analytics, and tool implementation, helping companies create reliable data bases for informed optimization decisions. A particular focus is on Google Marketing Platform setups and the clean use of user data.
Focus of the services:
- Conversion rate optimization (CRO) with audits, hypotheses, and A/B testing
- Digital analytics and tracking concepts
- Implementation and use of the Google Marketing Platform
- Analysis of user behavior and conversion paths
- Training courses on analytics and marketing tools
- Support for data-driven optimization programs
Highlights:
Optimize Matter combines operational conversion optimization with in-depth analytics and tool expertise. CRO is consistently data-driven—as an interplay of measurement concepts, analysis, and testing, not as isolated design optimization.
In addition to consulting and implementation projects, the agency offers structured training and continuing education courses on analytics tools and the Google Marketing Platform. This makes Optimize Matter particularly appealing to companies that want to build up internal data and optimization expertise in a targeted manner.
Benefit from the ideal combination of Varify.io® technologies and agency expertise.
WeLyft is a conversion optimization agency with a strong focus on user feedback and testing. Its work is based on the analysis of real-life usage situations and the systematic improvement of digital touchpoints. The aim is to identify specific barriers to use and address them in order of priority.
In addition to classic A/B testing, WeLyft relies heavily on user tests and qualitative insights to identify conversion barriers early on and prioritize them in a targeted manner. Data and user feedback are used equally to make informed decisions for optimizing websites and digital products.
Focus of the services:
- Conversion rate optimization (CRO) & A/B testing
- User testing & qualitative user analyses
- Data & Digital Analytics
- Development and support of testing programs
- CRO & A/B testing training courses
- Support for data-based optimization processes
Highlights:
WeLyft places a clear emphasis on qualitative findings from user tests. User feedback is used specifically to derive hypotheses for tests and to validate optimizations close to real-life usage situations. This allows conversion hurdles to be identified early on and prioritized appropriately.
Another focus is on training and empowerment. WeLyft supports companies in setting up their own testing and optimization processes and helps teams to establish these processes internally on a permanent basis. In addition to consulting and implementation, training and knowledge transfer are therefore key areas of focus.
Benefit from the ideal combination of Varify.io® technologies and agency expertise.
Zooka is an agency specializing in conversion optimization and UX design. The focus is on the structured analysis and redesign of digital user paths with the aim of making conversion-relevant touchpoints clearer, more understandable, and more effective.
The agency combines conversion audits, UX strategy, and design implementation, supporting projects from analysis and wireframes to A/B testing and landing pages. Optimization is approached in a highly visual and user-centered manner.
Focus of the services:
- Conversion audits to identify points of friction
- UX audits, UX strategy, and UX design
- Creation of wireframes and prototypes
- A/B testing to validate design and structure decisions
- Landing page design for SEA campaigns
- Optimization of user guidance and page structure
Highlights:
Zooka places a clear focus on UX-driven conversion optimization. Analysis, structure, and design are closely intertwined, so that optimizations are not tested in isolation, but are conceptually prepared and visually cleanly implemented.
Another focus is on combining conversion optimization and landing page design. Zooka develops pages specifically for performance channels such as SEA and uses testing to validate design and structure decisions based on data.
Benefit from the ideal combination of Varify.io® technologies and agency expertise.
