User Experience (UX/UI) Agencies in Rennes

Kwantic: Your trusted digital partner.

8 seconds...

That's all the time you have to capture your customers' attention online. And that's exactly what you'll need to understand why Kwantic is the partner you're looking for.

Why? Because we are convinced that a successful digital project is more than just technology. It's an alliance between captivating design, high-performance technologies, and exemplary responsiveness.

With a team of over 30 passionate experts, we have already delivered more than 100 successful projects, meeting the specific needs of marketing, communication, digital & e-commerce departments, IT departments, and CTOs.

We offer a complete range of services to support your digital transformation:

• Design and development of showcase and e-commerce websites
• Website redesign and migration
• UX/UI Design
• Development of website factories
• Web and mobile applications
• High-performance SEO strategy
• SEA and Meta Ads
• Social Media Management
• Inbound and Outbound Marketing
• Optimization, tracking, CRO, and data analysis

What makes the difference:

• Guaranteed responsiveness: A response within 4 hours, because every minute counts
• Solid certifications: RGAA, Crédit Impôt Innovation, Eco-Design, Webperformance 2.0
• Unique approach: A blend of creativity, data, and science for measurable results
• Trust Kwantic to bring your ideas to life and boost your growth. Contact us today to discover how we can help you achieve your goals.

The entire Kwantic team looks forward to discovering your project!

Contact us today and let's see how we can accelerate your results.

Hello Pomelo is the tech partner for Mid-Sized Companies (ETI) to design and deploy tailor-made digital solutions, integrated with your business and IT challenges.

Our specialties:

- Web and Mobile Development: Design of intuitive and high-performing applications, adapted to the specific needs of your sector. As an expert maintenance agency (TMA), we ensure bug fixes, optimize performance, and support the evolution of your applications.

- E-commerce: Creation of tailor-made online sales platforms, optimized to offer a fluid and engaging user experience. We develop marketplaces, B2B e-commerce, B2C e-commerce, and we integrate PIM / DAM/ MDM/ DXP.

- DevOps and Cloud: Implementation of agile and scalable infrastructures to improve team collaboration and accelerate the deployment of your solutions: Cloud migration, cybersecurity, managed services, and monitoring.

- ERP Integrator: Support for SMEs/ETIs in the audit, design, integration, and evolution of reliable ERP systems, adapted to your business needs.

Our successes:

We have the privilege of collaborating with companies such as Leboncoin, Photomaton, Mericq, Homair, Voyage Privé, Enovos, Proman... who have entrusted us with the realization of innovative projects. Thanks to our expertise, we know how to meet their challenges and support them towards successful long-term digitalization.

Why choose Hello Pomelo?

• Multi-expertise Agency, proven for over 10 years in piloting complex digital projects for Mid-Sized Companies (ETI), from design to deployment.
• Your long-term technological partner, we commit beyond delivery to evolve your solutions over time.
• Total transparency: real-time monitoring thanks to our Elephant Track tracking tool.

Join the companies that trust us to evolve their digital environment and build sustainable and high-performing solutions!

LE BACKYARD is a digital innovation agency that operates at a strategic level to create and optimize high-performing digital tools through user-centered design. Our agency is located in Paris 11th arrondissement, and our team is composed of 30+ experts (UX and UI designers, Product Owners, Web and mobile developers, etc.).

Our mastery of the entire value chain of a digital project allows us to support you in activating levers that enable you to increase productivity, grow your market share, improve your brand image and/or retain your customers.

Our methodology is user-centered and our interventions are always focused on measurable results with the aim of designing ever more efficient and profitable tools for you.

We are CII accredited for your mobile and web projects, so you can benefit from a 20% tax credit on all our services (subject to conditions)

OUR AREAS OF EXPERTISE:

>>> USER EXPERIENCE >>>

UX research / UX design / UX writing

>>> USER INTERFACE >>>

UI design / Interaction design / Service blueprint / UI kit / Design system

>>> PROJECT MANAGEMENT >>>

Product positioning / Solution definition / Quality control / Project steering

>>> WEB DEVELOPMENT >>>

Showcase websites / E-commerce platforms / Marketplace / Business tools / Intranets / Extranets / Maintenance

>>> MOBILE APP DEVELOPMENT >>>

Native /

Our team of developers works exclusively on React Native technology.

OUR CLIENTS:

AIR FRANCE, CITYSCOOT, COINHOUSE, SAINT LAURENT, EDF, GROUPE ADP, METROSCOPE, ORANGE, AMAZON, VINCI IMMOBILIER, MONEY TRACK, VEOLIA, RAIL EUROPE (SNCF), BLABLACAR, LOXAM, O'TACOS, THEOP, ENEDIS, SOWEE...

Discover all our expertise and achievements at www.lebackyard.fr.

Blacksmith (www.blacksmith.studio) supports large accounts, SMEs, and startups as a CII-certified web agency and startup studio since 2016.

We are experts in digital projects: redesign or creation of showcase websites, logos, visual identity, web and mobile applications, dashboards, SaaS, institutional websites, e-commerce...

We handle design (UX/UI, Product Design) and develop tailor-made solutions for you within a scalable and secure cloud architecture.

Our expertise:

1) Design: UX/UI, audits, branding, advertising banners, emailing, print...

2) Web and Mobile Development: showcase websites, apps, SaaS, dashboards, e-commerce... as well as no-code/low-code websites.

Stack: AWS, Jamstack, Strapi, Vercel, React.js, Nest.js, Next.js, Shopify, Wordpress...

3) Project Management: agile or fixed-price project management

4) Cloud & DevOps: audits, implementation, CI/CD, IAC, stress tests...

5) Content Creation: social media posts, newsletters, photo shoots...

6) Web3: NFT minting on Ethereum, Solana, etc.

Some of our latest achievements:

- https://riotgamesfrance.fr/ (design + web development + cloud architecture)

- https://parisbusinessangels.com/ (design + web development + cloud architecture)

- https://www.riot.eurcommunitycompetition.com/fr (design + web development + cloud architecture)

- https://www.fhu-apollo.fr/ (design + web development + cloud architecture)

- https://skillwise.fr/ (design + web development + cloud architecture)

- https://www.cavaclasher.fr/ (design + web development + cloud architecture)

- https://justrent.fr/ (design + web development + cloud architecture)

We have also designed and developed hundreds of advertisements for major brands (GIFI, TATI, Intersport, Jardiland, H&M, etc.).

Blacksmith is also:

1️⃣ Partner Shopify, AWS, Vercel, Strapi, BigCommerce, and Klaviyo.

2️⃣ Recognized by Sortlist with 1 European Award for “best customer satisfaction” and 2 features in their Guide to the Best Agencies

3️⃣ CII Certified: you can recover 30% of the amount of our Innovation invoices as tax credits

The technical challenge is high? No worries, we have successfully created several complex custom products:

- integrating third-party banking services such as Treezor

- integrating complex private APIs with https://lepass.io/ which allows refueling using DSRC badges at ENI gas stations

- integrated into secure cloud architectures, allowing us to handle tens of thousands of simultaneous users while maintaining reasonable financial costs

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"I don't know who you are. I don't know what you want. [...] What I do have are a very particular set of skills, skills I have acquired over a very long career. Skills that make me a nightmare for your bugs. [...] If you let me loose on your code, it will end here. I will find them, I will hunt them down and I will kill them."

Jacky - Lead Dev @ Blacksmith

www.blacksmith.studio

Nous concrétisons vos projets avec une touche de magie, offrant des solutions sur mesure reflétant votre image de marque.

Démarquez-vous avec une identité visuelle unique, atteignez de nouveaux sommets avec des sites web dynamiques, captivants et réactifs, suscitez l’engagement avec des animations vibrantes, et dominez les réseaux sociaux avec une stratégie de contenu percutante. Laissez-nous illuminer votre identité visuelle et éclairer votre communication.

Embark on a digital conquest and boost your digital activity!

With over 10 years of experience in IT and CII approved, Josh Digital is among the best next-generation French TECH Agencies, supported by BPI FRANCE, BNP PARIBAS & CCI DE PARIS IDF.

Based on an agile, immersive, collaborative, and responsible approach, we provide high-level digital expertise thanks to our team passionate about new technologies, for the custom development of digital applications in continuous improvement:

* Specific business tools integrated into our clients' IS (BPM, DASHBOARD, EXTRANET / INTRANET, ERP, CRM)

* Mobile / tablet applications on iOS and Android (crossplatform)

* Self-hosted AI Solutions (RAG, LLM/VLM, NLP, DATA, AUTOMOTION, AGENTIC)

* Websites and dedicated platforms (Client areas, Partner areas)

* Proactive, corrective, and evolutive maintenance (TMA / TME)

* Server infrastructure outsourcing and devops

Composed of creative & technical talents with fullstack skills and solid experience (UX/UI Design & IT Development), we aim to be a true extension of your team, adapting to your needs in a collaborative framework, fully engaging in your project.

Josh Digital, in numbers, is:

+20 Employees

+95 Clients

+300 Digital Projects

+50 Mobile Applications

+30 Business Apps

Today, we collaborate with prestigious large companies and innovative startups, such as: BNP Paribas, Nicolas Feuillatte, SNCF, ISS France, Welkeys, Arioneo, Samboat... And many others who have chosen to trust us!

Always seeking innovation, we advise our clients on technological choices and the implementation of their digital projects.

Have a Tech Project to entrust to us? Gain productivity and digital competitiveness now!

#WEARETECH

#WEAREJOSH

The KNR agency is the benchmark e-commerce agency for fashion, luxury, and cosmetics brands. We support exceptional brands in implementing their digital tools.

Experts in Salesforce Marketing Cloud and Shopify Plus technologies, we develop tailor-made marketing and e-commerce solutions adapted to their needs.

Thus, we have put our know-how and expertise at the service of our clients by supporting them in: the creation or redesign of e-commerce sites, custom development of newsletters, or consulting on the Salesforce environment. All our solutions are adapted to your needs and simple to use, always taking care of the user experience.

The objective is to provide your brand with a high ROI solution that respects both your brand image and your online commercial objectives, in line with the expertise of a premium agency.

Today, companies such as Tag Heuer, Rimowa, L'Oréal, Maje, Sandro, Givenchy, Maison Alaïa, Etam, IKKS, Lancôme, Minelli, Yves Saint Laurent, Valentino, Undiz, Skinceutical and many others trust us for the development of tailor-made solutions.

Lets Progress is a remote tech team based in France, founded in 2021. The company helps organisations digitalize by combining experienced professionals with a practical, outcome-focused approach.

Core services: Technology Consulting - advising on cost-efficient technology choices; UX/UI Design - creating user-centred experiences; Product Development - aligning technical delivery with product vision; Maintenance & Support - ensuring continuity and improvement.

Approach: Iterative and pragmatic: rapid prototyping, clear technology decisions and continuous collaboration to deliver scalable results.

Why choose Lets Progress: remote-first flexibility, a compact team of qualified specialists and end-to-end coverage from strategy to long-term support.

Superchouette is a creative & digital agency that helps brands move very quickly from idea to assets online, without any hassle.

We design, produce, and orchestrate everything related to your image and digital experiences, with a senior team that speaks business as much as art direction.

What we do for you:

• Branding & Identity: logo, visual territory, guidelines, tone of voice, print & digital assets.

• UX/UI & Websites: showcase sites, e-commerce, and custom platforms, designed for conversion.

• E-retail & Marketplaces: Amazon brandstores, A+ pages, e-retail assets, integration (Amazon, SFCC, Shopify…).

• Content & Campaigns: 3D, motion, video, social content, packshots, creative kits for markets & subsidiaries.

We work daily with players like Moët Hennessy, L’Oréal (Vichy), Younited…, on projects where we need to reconcile corporate codes, regulatory constraints, and performance objectives.

Our way of working:

• no intermediaries: you speak directly with the people who design and produce; a dedicated team

• simple communication, high reactivity, clean and usable deliverables; an agile and responsive team

• transparency and constant optimization of processes, deadlines, and budgets; a growth partner

Specifically, we help you to:

• clarify your positioning and priorities (audit, workshop, scoping);

• establish a coherent brand universe, adaptable to all your touchpoints;

• design digital experiences that convert;

• produce and adapt your assets for the right channels.

If you are looking for a pedagogical partner, capable of transforming any need into a concrete, measurable, and on-brand solution, Superchouette is the right agency for you.

ID Interactive is an independent digital agency founded in 2006, based in Brittany and specializing in the creation of custom websites and applications in Next.js and the digital performance optimization of its clients. Our mission is to find points of contact between brands and their audience and create the interactions to bring them to life.

Our expertise:

• Creation of websites and web apps (e-commerce or showcase)
• UX/UI design and conversion-oriented redesign
• SEO and long-term visibility strategy
• Google Ads & Meta Ads campaigns (Google Partner agency)
• Development of business tools and complex web platforms
• Maintenance, hosting, and continuous support

What makes us unique:

At ID Interactive, we believe that digital performance cannot be improvised: it is designed, built, and supported over the long term. Here's what sets us apart:

• 100% custom solutions

Each project is designed to meet your business challenges, without ever resorting to standardized solutions.

• Elite technical expertise

We have developed our own framework based on Next.js and Payload CMS, to create sites that are as fluid and performant as mobile applications.

• An integrated web & marketing approach

Design, development, SEO, Google Ads, analytics, content strategy... everything is managed coherently by a single team.

• A committed, human-sized team

No outsourced production or massive subcontracting: our experts are in-house and fully invested in your success.

• Proven experience

Nearly 20 years of existence and over 300 clients currently supported, in sectors as varied as industry, tourism, health, or retail.

• Ability to manage complex projects

Business platforms, extranets, multisites, API interconnections, CRM... we master advanced technical environments.

• Long-term support

Maintenance, hosting, functional evolutions, strategic reporting: we remain mobilized long after the launch.

• A results-driven culture

We believe in iterative methodologies and test & learn logic to maximize the impact of each digital action.

• A premium, accessible positioning

Quality of service, high standards, rigor, without the cumbersome nature of large agencies: we focus on excellence through proximity.

A national leader in several specific markets, the Rivacom agency is today a key player in alternative communication in the West of France. Thanks to its 360° offering, Rivacom can respond to all communication issues: from strategic consulting to the implementation of press relations plans, including the production of print/digital/video content, or the execution of turnkey public relations operations.

Through its Rivacom Events brand, it is also a leader today in the organization of major events in the territory: the ATP tennis tournaments in Brest, Rennes and Vendée, ocean races such as the Route du Rhum-Destination Guadeloupe with OC Sport, and several BtoB or BtoC trade shows (tourism, seniors, Digital, etc.) are part of its catalog of recurring events.

An emotional connection. That's what we build between brands and their communities. Our clients benefit from our unique approach, based on market research and brand strategy, with a refined collaborative process designed to cultivate trust and build your company's reputation.

Our approach is based on 4 pillars:

• Brand, acquisition, or operational Strategy.
• Branding, adapted to your growth stage.
• Web, for a frictionless user experience.
• Growth, to increase your visibility and revenue.

Our Vision

A forward-thinking and innovative vision of our profession: that is what characterizes Flying Saucer Studio. Since the agency was founded in 2015, our international team has been present in France, Switzerland, the United States, and is fully remote. All our processes are adapted for SMEs and Startups to deliver quality work within remarkable timeframes and costs.

Finally, our leaders are renowned creatives with multiple FWA, Webby Awards, Gold Awards, and are also mentors for many accelerators such as Techstars and Alchemist.

Our Purpose

Our purpose? We believe in Positive Impact; in the power that small and medium-sized structures have to act quickly, solve major problems, and change the world positively. We believe in innovative entrepreneurs; who know how to combine economic success with benefits for the community.

Our support has contributed to the success of major fundraising rounds, over €20M in Europe and North America.

A few examples of our creations?

Our international clients come from various industries: FinTech, HealthTech, SAAS, B2C, B2B, Hardware, AI, E-commerce; our expertise adapts to all your objectives. You can also find them in TechCrunch, the NY Times, USA Today, and many other media outlets.

Wink Stratégies is a creative communication/marketing/public relations agency that helps companies and organizations communicate better, position themselves, and innovate intelligently.

Wink is an agency that combines strategy, creativity, and social engagement to help organizations turn their ideas from intention into impact.

We think, we create, we act — to advance useful, human, and inspiring projects.

Meaning. Beauty. Concrete results.

Wink transforms strong ideas into intelligent strategies, values into impactful campaigns, and commitments into visible and measurable actions.

A 360° communication agency, Wink Stratégies is composed of a multidisciplinary team, including project managers, communication and web marketing specialists, graphic designers, web designers, web developers, SEO specialists, social media specialists, and public relations specialists. The diversity of in-house talent allows for each project to be approached with a global and coordinated vision.

What sets the agency apart is its team of passionate individuals, combining creativity and rigor to develop innovative and effective solutions for its clients. Personally committed to the success of projects, each team member ensures that the client is fully satisfied with the results as well as with the contact with the agency throughout the project.

Since 2015, the agency has received several awards in Web design and media creativity and was nominated in the Agency of the Year category at the prestigious AWWWARDS.

+300 digital growth missions completed for its clients. Commitment, precision, performance.

At Digitalised, we have the art of finding growth where it lies. Our experts master the most innovative and high-performing tools on the market to address all your digital challenges: acquisition, retention, transformation, sales, virality,... Regardless of your sector or size.

We intervene across the entire customer journey in pursuit of increased performance. You will thus be able to generate more qualified leads, increase your conversion rate, and reach new audiences through the intensive work of our teams; with continuous adaptability.

We cultivate strong internal values: precision - innovation - performance - entrepreneurial DNA, which position us as a true growth partner. Our clients are not mistaken: we understand their challenges and their day-to-day new business needs.

Digitalised operates the following services:

• Messaging automation (email, LinkedIn, WhatsApp,...)
• Nurturing and CRM
• UX / UI for web platforms and landing pages
• Natural referencing
• Google Adwords
• Facebook Ads
• Instagram Ads
• Linkedin Ads
• Audit and consulting for all digital issues

Article to read in CHALLENGES "Digitalised: a growth marketing gem that cultivates work ethic and attention to detail."

https://www.challenges.fr/partenaires/digitalised-une-pepite-du-growth-marketing-qui-cultive-valeur-travail-et-souci-du-detail_909510

Article to read in LE FIGARO , Digitalised, the agency that illustrates the international growth of a "France Digitale"

Presentation
Size Up is a Growth Marketing agency based in Rennes, dedicated to the growth of companies in France and abroad. It supports over 60 clients, from launch to development.

Services
Consulting: audit and marketing/sales strategy.
Training: mindset, know-how, and tool mastery.
Operational: inbound (social media, photos/videos/motion, graphic design, content marketing, SEO/SEA/SMA, webdesign) and outbound (lead generation, automation, cold calling, cold mailing).

Approach
Pragmatic and results-oriented, Size Up combines strategy, skill development, and execution to ensure sustainable growth.

Added Value
Global support, flexibility, and multi-channel expertise to accelerate commercial performance.

Since 2014, Gradiweb has been supporting major E-commerce players in the design, development, and optimization of high-end Shopify sites.

Based in western Paris, our team of Shopify experts implements its know-how in user experience, graphic design, and feature integration to build high-performance sales tools perfectly tailored to needs. Nothing is left to chance; we ensure that the site is SEO-friendly, mobile-first, and fully configurable.

Digital Unicorn is a CII-approved digital studio, specializing in the design and development of high-performing, innovative, and tailor-made digital projects. We are a team of expert developers, designers, and project managers, all passionate about our craft and proud of the applications we create for our clients.

Whether you are a large company or an innovative startup, whatever your project, we are here to make it happen.

Technological Solution

• At the forefront of the latest trends and technological advancements, we conceive and develop the best solutions for each of your needs: connected objects, micro-geolocalization, artificial intelligence, virtual reality... We favor the most robust and efficient technologies such as React Native, Node.js, Redux, or Firebase for the development of your projects.

• We like to get involved in projects by proposing the creation and development of UX (User Experience), then UI (User Interface), and Design to ensure that the technical and commercial product design truly meets the needs of the target audience. We are convinced that close collaboration from the very beginning of an idea is the guarantee of rapid and efficient development, ensuring future success. We make this our priority.

UX and UI Design Solution

• Our designers work with you to create a graphical interface (UI) and user experience (UX) that meet the functional requirements of your project. We invite you to read the article we wrote on the definition of UX Design and its difference from UI Design.

• The design and development phases are very important. To help you stand out, design and user experience will allow us to offer a real Value Proposition for your project. This will determine the first impressions of your users.

At iytro, we believe branding is more than surface-level beauty. It’s clarity, strength, and impact—the kind that turns heads and drives results.

Founded in 2019, iytro set out to help early-stage startups grow through flexible, part-time CMO support. Behind the scenes, our creative crew was the hidden engine—designing the brands, decks, and digital experiences that powered those missions. That team has since evolved into iytro creative studio: an independent powerhouse that blends design craft with the marketing sharpness of our iytro roots. With 150+ successful missions across industries, we know how to turn a vision into a brand that delivers—sustainably, authentically, and powerfully.

What we create

Brand Foundations :

• Strategic brand platforms that define your positioning and personality
• Distinctive naming that captures your essence
• Visual identity systems that work across every touchpoint

Digital Presence :

• Custom website design and development that converts
• User experiences that tell your story seamlessly

Brand Assets :

• Compelling pitch decks and presentations
• Marketing collateral that drives action
• Brand guidelines that ensure consistency
• Packaging, campaigns, and everything in between

Our approach

Design isn’t decoration. It’s strategy made visible. It’s how creativity becomes growth. We design with honesty, boldness, and empathy—never overcomplicating, always staying sharp.

Who we work with

Startup founders launching their first brand

Venture capital firms supporting their portfolio

Corporates with new ventures to prove

Scaleups facing marketing gaps or brand challenges

Real branding. No jargon. No fluff. Just your vision—brought to life.

For 25 years, the SEO agency NOIISE has been supporting its clients in their digital marketing strategy.

⭐ Whether you want to improve your site traffic, increase your conversions and sales, or redo your website, our team of experts will meet your expectations.

At NOIISE, we put our heart into each of our projects and do everything we can to maximize your results. This has also allowed us to win several awards in our areas of expertise 🥇

🧑‍🎓 Our certifications: Google Partner Premier, Microsoft Advertising Partner, QASEO, CESEO

Find us in one of our 7 agencies: Paris, Lyon, Marseille, Nantes, Montpellier, Lille, Aix-les-Bains.