Product Design Agencies in Lille

At the crossroads of a consulting firm, an agency, and an IT services company, NEXTON cultivates an innovative positioning. Thanks to our experts, we support our major clients and pure players in their digital evolution and innovation strategies.

Our service offering:

DIGITAL

Create, improve, and bring your product or service to life

COMMUNICATION & MARKETING

Create, animate, and make your brand perform

STRATEGY

Support, structure, and evolve your organization

A committed company, NEXTON is certified ISO 9001, 27001, Ecovadis Gold top5% (78/100), Gender equality index 92/100.

We support our clients on topics of custom web and mobile design & development.

Since 2010, we have been involved in creating websites, platforms, and mobile applications.

We work for start-ups and associations: Action contre la faim, Fondapol,

for large groups: Roche, Rungis, Nespresso, Freyssinet, Galbani, Best Westen etc.

as well as (very) innovative clients: Mirakl, SkinAnalysia etc.

We are involved in the Consulting phase: Usage & needs definition, Infrastructure & technologies, Digital transition consulting, but also in the execution phase: UX & UI, Web development, Mobile development,

as well as consulting in Server Infrastructure.

We favor close support for clients with dedicated project managers, using agile methods.

Our team is composed of specialized technical profiles, to approach our projects in an optimized way and be reactive to our clients' requests. Our quality testing and automated deployment methods allow us to maintain this same reactivity in the very long term.

Contact us for a free analysis of your project.

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.

W3r.one supports companies in the design and development of fully custom web and mobile applications. We build robust, intuitive, and scalable solutions, perfectly aligned with your needs, processes, and ambitions.

We get involved from the very first steps to structure requirements, lay solid technical foundations, and make the right choices from the outset. Thanks to our consulting approach, we help you connect your business challenges with the most relevant technologies and find solutions throughout the project, even as needs evolve.

We work with SMEs, mid-sized companies, and venture-backed startups looking to establish a solid technical stack to support their growth, reassure their investors, and scale without technical debt.

🎯 Our Approach

➤ Scoping workshops to align product vision and ground reality

➤ Highly user-centric UX/UI: clear, simple, effective

➤ Custom full-stack development (React, React Native, TypeScript, Symfony...)

➤ MVPs delivered in a few weeks, without compromising on quality

➤ Seamless integration of all your tools via API (ERP, CRM, third-party services...)

➤ AI & Data Expertise: automation, analytics, decision support

➤ Optimization of internal processes through custom business platforms

➤ Continuous technological consulting: architecture choices, scalability, technical trade-offs

💡 Our Difference

We translate your business challenges into concrete, high-performing digital solutions that are ready to evolve with you.

At W3r.one, every line of code serves a clear vision: to build a solid, scalable, and useful technical foundation.

Do you have an idea, a project, or a business need to transform?

📩 Contact us, let's talk about it.

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.

With a team boasting over 20 years of experience,KREAPP stands out in the creation of tailor-made business applications. We have evolved, progressing from designing applications for large corporations to developing custom solutions for SMEs. Our journey is marked by ongoing success, demonstrated by our expertise in end-to-end application development, from the initial idea to concrete implementation.

Our team is the heart of our strength. Composed of a Product Owner, a designer, a UX specialist, Fullstack developers, and a manager—all experts and seniors in their field—we have the skills needed to turn your ideas into tangible realities. We support decision-makers and entrepreneurs at every stage, from ideation to resolving specific business challenges.

We understand that each project is unique. Our approach consists of providing fully tailored solutions to your specific needs. Whether it's digitizing your processes, developing business plans, defining requirements, conducting market studies, or implementing software solutions, KreApp stands by your side.

As your innovation partner, KreApp goes beyond simple application development. We provide strategic support in marketing, research and development, expertise in software architectures, and much more. Whether you're looking to develop a custom application or personalize existing software, our goal is to propel your business to the forefront of technology.

Our human-scale structure, combined with our professionals' expertise, gives us remarkable agility. We are able to react quickly and efficiently, ensuring the implementation of customized software solutions that perfectly meet your expectations.

KREAPP is ready to turn your vision into digital success. Contact us to begin a partnership that will redefine the potential of your business.

Founded in 2011, Eleven Labs is an IT consulting and implementation firm recognized for its technical excellence and the quality of its profiles. With 100 astronauts and over 500 projects completed, we support companies like Radio France, Decathlon, Sephora, The Fork, Société Générale, 20 Minutes, Citeo, and Believe every day.

Our role is to provide cutting-edge expertise to frame, secure, and accelerate the most demanding digital transformations. We intervene from the outset with audits and strategic consulting to secure decisions, then we design and deliver robust and sustainable solutions through tailor-made delivery.

Our expertise:

🪐 Technology Audit & Consulting

🪐 Custom Web Development

🪐 Cloud & DevOps

🪐 Data Engineering & AI

Our AI Lab designs artificial intelligence agents and solutions (AI agents, RAG, LLM) focused on business value. We develop custom agent architectures, connected to companies' systems and data (via MCP servers), to automate processes.

Our difference lies in collective intelligence. We are convinced that value comes primarily from the collective, and that experts augmented by their ability to share, challenge, and build together go further. On a daily basis, we rely on demanding standards: clean architecture, code quality, FinOps, and DevSecOps integrated from the design phase. This rigor allows us to deliver reliable solutions.

We are SaaS solution publishers, and each product we develop is the result of years of experience and process optimization, particularly with our development studio. Our teams master all the steps necessary to design, develop, and launch high-performance SaaS solutions, always with a focus on continuous innovation.

FLEXILAB, created in 2015, represents the culmination of over two decades of experience in the technological field, marked by leadership focused on functional product design, software architecture, and efficient project management.

This company stands out for its commitment to functional customer support. Focused on services and software publishing, FLEXILAB offers cutting-edge expertise in application design and IT project management.

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.

Katalyx – The business & tech task force for ambitious entrepreneurs.

You are a manager, consultant or investor. You have identified a growth lever, a tool idea or a strategic opportunity for yourself or one of your clients.

But you know that to take it to the next level, an isolated freelancer or an impersonal agency is not enough.

At Katalyx, we support those who want to transform their vision into a concrete, high-performance and profitable digital solution.

We design and deploy websites, applications, business tools and acquisition strategies that create a measurable competitive advantage.

No vague promises. No jargon.

Just clear management, a senior team, and solid deliverables.

Our clients call on us to:

– Create a differentiating digital product (SaaS, platform, business tool) with artificial intelligence

– Increase efficiency (automation, processes, simplification)

– Improve their image, conversion or commercial impact

Katalyx is not just another agency.

It is a close-knit, business-oriented team capable of acting quickly, thinking straight, and executing cleanly.

Want to see what we could build together?

www.katalyx.fr

At wiiv., we are here to make your brand a success, the proof:

→ Our particularity?

We have our own brand.

We created it from scratch and are taking it to the top day after day.

We know what it's like to create a product, to find its first customers, to justify its prices. We live what we advise you, better yet: we test our own advice in real market conditions.

We have supported very beautiful brands such as CIC, Crédit Mutuel, TDF, BMW, LDLC, but also brilliant startups: DailyHack, le Lab de l'endo, Kera, Billy trimmer and many others.

→ Our specialty, lifestyle and trendy brands:

Our proven method that makes the difference:

• Understand your WHY, your objectives, your context, your qualities and your risks
• Strategically position your brand before creating anything
• Create an identity that justifies your prices without negotiation
• Turn your customers into natural ambassadors

→ What we concretely bring you:

→ A founder's vision, not a consultant's

We launched our own product brand. We know the reality on the ground, not just the theory.

→ Strategic branding, not just cosmetic

Logo + colors, that's 10% of the job. The remaining 90%? Your positioning, your differentiation, your brand promise.

→ Straightforward and non-bullshit advice

If you are not ready for premium branding, we will tell you. If you are targeting the wrong market, we will too.

→ A 3-step method:

• DNA Branding: Discover the founder's WHY
• Strategic Branding: Market positioning and differentiation
• Communicative Branding: Visual identity that reflects the strategy

→ What we love to do for you:

• The branding book (the summary of your entire brand and its strategic axes)
• The strategic axis
• The logo
• The design and graphic charter
• The packagings (Love love love, we adore it!)
• And much more

→ Our objective: to make your brand a success

Our challenge: To make your brand a success, no matter your product!

nuances designs custom digital solutions, from product discovery to the extra mile. Specializing in e-commerce and SaaS, we combine technological mastery, intuitive design, product strategy, and continuous optimization (CRO) to transform your projects into impactful and profitable experiences.

What sets us apart:

We have no sales representatives.

We never have.

And we never will.

99% of our revenue comes exclusively from client recommendations and our reputation, which are enough to fill our schedule.

Your future recommendation of our services is our primary criterion for measuring the success of our collaboration.

Know-how: we take ownership of your challenges to make them intimately ours

Business-first: technology only makes sense when it serves the business

Ultra-specialized team: small, responsive team, direct communication, controlled deadlines

Extra-mile commitment: your success is our long-term responsibility

E-commerce & SaaS focus: proven expertise on Shopify platforms, marketplaces, and SaaS applications

Data-driven culture: decisions and iterations guided by analytics and real feedback.

Our potential areas of action:

UI/UX Design & Branding

• Creation of visual identities, Branding & brand platform
• Logo, graphic charter, guidelines.
• Figma wireframes & mockups
• Product Design
• UI/UX conception
• User journeys, interactive prototypes
• UX Research

Technology

• Front-end and Shopify & Shopify+ integration
• Full-stack development (Node.js, React), third-party APIs, back-office, CI/CD, Test Automation
• AI Model training & LLM integration, agent design & development

Product Strategy, CRO & Data

• Product scoping, backlog & user stories, MVP and iterations based on user feedback
• Analytics audit (GA4, Hotjar…), tracking, A/B tests, statistical analyses and conversion optimization
• Project management, QA, empowerment of client teams

Web, mobile and IT consulting agency.

A fusion between an IT consulting firm and a development agency, we support large companies, SMEs and pure players in the design and development of their digital solutions.

Our Mobile Factory is made up of experts in the design and development of mobile applications. We use the latest native or hybrid (cross-platform) technologies.

We can audit, monitor, update, promote, design, optimize or develop the next features of your mobile applications.

We support companies in their strategic and digital transformation — from idea to execution.

Our strength lies in co-construction: we work with you, never in your place.

Because real transformation can’t be outsourced — it’s built together.

From strategy to product, we turn ambition into tangible growth and lasting impact.

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.

Together, let's create digital solutions for the future.

A digital production studio committed to meet tomorrow's challenges by building eco-designed solutions, with the latest technological innovations.

We make digital solutions that are more efficient, more secure and less resource-intensive.

For over 15 years, Adeliom has been the digital co-pilot for Mid-sized Companies, Large Enterprises & Organizations whose current digital model has reached its limits.



Scattered data, businesses constrained by tools, disjointed customer journeys, and a multitude of providers, without a conductor to orchestrate everything.

We support Digital, Marketing & IT departments in transforming their digital ecosystem into a lever for commercial and operational efficiency.



Our role: to frame, structure, design, optimize.



Concretely, our support is based on four phases:

1. Analyze and frame the project, to clarify the use cases, align stakeholders, and prioritize all their needs as well as the right performance indicators.

2. Structure the solution architecture, by modeling customer and business journeys, data flows, and defining the specific ergonomic and technical architecture.

3. Design tailor-made interconnected solutions:


• Product sites & order portals


• Customer & network spaces


• Product configurators & calculators


• Business & field tools (Technician, Sales Admin, HR, After-sales Service, Sales)

4. Continuously test, maintain, and improve, by sustainably evolving these services through various optimizations (UX, technical, CRO, accessibility) and reasoned AI implementations.



The result: better-equipped teams, loyal customers, and a fully mastered distribution network.

Ultimately,

Adeliom becomes a true extension of their team, aligning the IS with the reality of businesses and customers to put technology back at the service of the Humans who use it.



Some inspiring results: 



✔︎ +15 % qualified leads – Culligan


✔︎ +7 % conversion – Tryba


✔︎ +57 % orders – Airbus


✔︎ x2 online sales – Liebherr


✔︎ +8 % engagement rate – Airbus



A structuring project to launch? -> contact@adeliom.com | 03 67 10 08 49

At Lost Mechanics, we create custom websites, placing your needs and expectations at the heart of our process. Our team of web designers and developers combines creativity and technical expertise to design engaging user experiences, offering perfectly tailored and sustainable solutions.

We firmly believe that unconventional thinking is essential to stand out in a constantly evolving digital environment. This approach is an integral part of our DNA and guides us in each of our projects.

In close collaboration with you, we define strategies that reflect your vision and respect your identity. Our expertise in user experience allows us to design projects that meet modern web usage, ensuring smooth and intuitive navigation for your users. We ensure total transparency throughout the creation process; everything we do is done in-house, guaranteeing rigorous monitoring and tailor-made results.

Our services:

Design . Development

• Web and application development
• UX Design & Research
• Interface Design
• Illustration & Animations

We are convinced that unconventional thinking is essential to stand out in a constantly evolving digital environment. This approach is an integral part of our DNA and guides us in each of our projects.

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