Product design agency - bespoke solutions with

fewer clicks.

more activation.

more adoption.

Interfaces that make the next action obvious
and satisfying.

Why choose our product design agency?

01

Increase Adoption and Retention

Good product design makes the product intuitive to use: clear onboarding, a smooth user journey, and less effort. The result: increased activation, higher retention, and reduced churn.

02

Reduce Friction and Support

When UX is well-designed, users make fewer mistakes, get stuck less often, and ask fewer questions. Result: fewer support tickets and a team that can breathe.

03

Build faster with a component library

Every new feature is built from existing components, rather than redesigning a screen from scratch. Result: 2x velocity (and fewer back-and-forths).

These companies' marketing teams trust us

Votre logo

Finary company logo with stylized 'F' symbol and the word 'Finary' in black font.
Finary company logo with stylized 'F' symbol and the word 'Finary' in black font.
Finary company logo with stylized 'F' symbol and the word 'Finary' in black font.
Finary company logo with stylized 'F' symbol and the word 'Finary' in black font.
Finary company logo with stylized 'F' symbol and the word 'Finary' in black font.
Finary company logo with stylized 'F' symbol and the word 'Finary' in black font.

“Lorem ipsum dolor sit amet consectetur. Neque netus enim cursus sagittis elementum pellentesque etiam. Risus massa vestibulum et imperdiet eu. Sed facilisis nulla vel nisl turpis ultrices pellentesque.”

Mathieu M

CMO

services offered by our product design agency

From UX strategy to the final pixel

Des maquettes réalistes et détaillées de chaque écran, fidèles au rendu final, pour tout valider avant l'intégration.

A visual component library: buttons, form fields, icons, and interface elements

They trusted us
for their product design

We entrusted Gemeos with a full website redesign and migration, and everything went incredibly smoothly. What stood out most to us was the quality of the art direction: a truly premium, cohesive visual direction, with a clear visual identity and highly polished choices throughout — typography, colors, iconography, pacing, hierarchy, and more. You can tell they have great taste, and above all, a real eye for detail on every screen. On top of that, the team is incredibly responsive and very experienced: they know both design and the technical side inside out. I’d recommend them without hesitation.

David BERNARD

CEO & Founder @AssessFirst

Efficiency, structure, and performance. Gemeos managed to translate Avnear’s identity into a website that exceeded our expectations. Client feedback has been unanimous. The team showed remarkable agility in adapting to our requests and our high standards. A trusted partner we’d recommend without hesitation. Our site is a masterclass in building trust.

Charley Arod

Founding Partner. Asset & Risk Management @Avnear

A great experience with Gemeos on our website redesign. The team was responsive, attentive, and proactive from start to finish. The result perfectly reflects the image we wanted to convey.

Loïc Calvy

Co-founder @Bloomays

Thanks to the whole team, always going the extra mile to push the boundaries!

Florent Darrault

CMO @Cureety

Adaptability, Speed, Great communication, Specialist(s), Efficiency, Good vibes, Professionalism, Competitive pricing, Agility, Strong support, Analytical skills, Cutting-edge, Seriousness, Friendly, Responsiveness, Flexibility, Reliability, Expertise, Attentive, Creativity

Hugo Bouchillou

CEO @Cycle Events

Gemeos worked on the Webflow integration as part of our website redesign, with the goal of giving our Growth team back control over landing page creation and improving web performance and SEO. I highly recommend Sandro for his availability, responsiveness, teaching approach, and, above all, his understanding of our business needs.

Florian Corteel

SEO Manager @Finary

Our Product Design Methodology

From concept to product, we bring your vision to life

No magic formula, just a proven method trusted by 200+ clients

Roadmap

Timeline

Illustrated rocket launching upward, symbolizing startup growth and business acceleration.

Brief & Kick-off

Brief & Kick-off

It all starts with a conversation. You present your product, business objectives, and user needs. Together, we define the project scope and expected outcomes.

Audit & Research

Audit & Research

We analyze your market, competitors, and target users. We conduct interviews, UX audits, and benchmarks to build a solid foundation for informed decisions.

UX Strategy

UX Strategy

We define the personas, user journeys, and information architecture of your product. You gain a clear vision of the structure and flows before moving to design.

UI Concept

UI Concept

We create your product's UI Kit: color palette, typography, components, and usage rules. You discover your product's visual identity.

High-Fidelity Mockups

High-Fidelity Mockups

We implement the UI Kit across all your high-fidelity screens. Every page, state, and interaction is meticulously designed.

Adjustments and Delivery

Adjustments and Delivery

We gather your final feedback and refine every detail. We deliver all source files, the documented design system, and technical specifications ready for development.

Brief & Kick-off

It all starts with a conversation. You present your product, business objectives, and user needs to us. Together, we define the project scope and expected outcomes.

1

Audit & Research

We analyze your market, competitors, and target users. We conduct UX audits and benchmarks to build a solid foundation for informed decisions.

2

UX strategy

We define the personas, user journeys, and information architecture of your product. You gain a clear understanding of the structure and flows before moving to design.

3

UI concept

We create your product's UI Kit: color palette, typography, components, and usage guidelines. You discover your product's visual identity.

4

High-fidelity mockups

We implement the UI Kit across all your screens in high fidelity. Every page, state, and interaction is meticulously designed.

5

Adjustments and Delivery

We gather your final feedback and refine every detail. We deliver all source files, the documented design system, and technical specifications ready for development.

6

+250 companies supported

Discover our clients' feedback

4.9/5   • 97 reviews

Most agencies make a great first impression and sell you the dream in those early conversations, but that illusion fades fast once the contract is signed. With Gemeos, it’s different. Gemeos are professional and genuinely committed to doing things right and fast. I really recommend them. And this is the first time I’ve ever recommended an agency.

Quentin Mayet

VP Marketing @Paradox

We worked with Gemeos in the summer of 2024 to redesign Modjo’s marketing site and better reflect the brand’s new positioning. The collaboration was incredibly efficient, the agency was highly responsive and adapted to every unexpected challenge. With limited resources on our side, right in the middle of summer, we launched the new site in just six weeks. Site visit engagement increased by 58%!

Thomas Beylot

VP Product @Modjo

“Gemeos are the perfect experts to take over your website from A to Z. Beyond being highly skilled, they were proactive and came up with great ideas throughout the project, a real plus! Thanks for this fantastic Openeat website redesign ;)”

Martin Catineau

Head of Market @Openeat

Really great working with you — you get up to speed really fast, and the process is frictionless 🔥

Kévin Moënne-Loccoz

VP of Product & Design @Lemlist

Sandro and his team are incredibly efficient and really attentive. They have a great grasp of their clients’ SEO challenges and always come up with the right solutions. Highly recommend

Jules Ratier

CEO @Koncile

Gemeos delivered a showcase website that met our standards, while still working within a pretty tight timeline. Their process was efficient, and they were available, attentive, and very responsive throughout the project. They’re a highly complementary and very capable duo. Highly recommend!

Thibaud Bertrand

Head of Marketing @Side

“Great Webflow agency. Available, attentive, and responsive. We brought them in to redesign our Nuant.com website, providing the Figma mockups. We’re very happy with the result, and their Webflow expertise is a real asset.”

Leo Carli

Product Marketing Manager @Nuant

We worked with Gemeos for several months on the redesign of our site and the launch of our new Taalent.ai offering in the U.S. market. The team was able to combine strategic vision, high-quality execution, and great responsiveness throughout the project. An effective collaboration that I’d recommend without hesitation.

Alexandre Duffaut

CEO @Noota

Efficiency, structure, and performance. Gemeos managed to translate Avnear’s identity into a website that exceeded our expectations. Client feedback has been unanimous. The team showed remarkable agility in adapting to our requests and our high standards. A trusted partner we’d recommend without hesitation. Our site is a masterclass in building trust.

Charley Arod

Founding Partner. Asset & Risk Management @Avnear

Gemeos worked on the Webflow integration as part of our website redesign, with the goal of giving our Growth team back control over landing page creation and improving web performance and SEO. I highly recommend Sandro for his availability, responsiveness, teaching approach, and, above all, his understanding of our business needs.

Florian Corteel

SEO Manager @Finary

Thanks to the whole team, always going the extra mile to push the boundaries!

Florent Darrault

CMO @Cureety

We entrusted Gemeos with a full website redesign and migration, and everything went incredibly smoothly. What stood out most to us was the quality of the art direction: a truly premium, cohesive visual direction, with a clear visual identity and highly polished choices throughout — typography, colors, iconography, pacing, hierarchy, and more. You can tell they have great taste, and above all, a real eye for detail on every screen. On top of that, the team is incredibly responsive and very experienced: they know both design and the technical side inside out. I’d recommend them without hesitation.

David BERNARD

CEO & Founder @AssessFirst

Sacha & Sandro worked on the redesign and migration of our website with a few clear goals: create a unique, differentiated visual identity, clarify our message and value proposition, smooth out the customer journey, and ultimately generate more business opportunities. We’re very happy with the result, and the numbers speak for themselves. Sacha & Sandro are skilled, committed, conscientious, passionate, and they see things through to the end. I highly recommend them!

Idir AIT SI AMER

CEO @Tracktor

WhattheFAQ?

What are the key elements of good product design?

Good product design simultaneously meets three requirements: it is useful (it solves a real problem), usable (the user understands how to use it effortlessly), and desirable (it makes users want to return to it). Most products fail on the second criterion: technically functional, but too complex to use.

Élément cléCe que ça signifie concrètement
Architecture de l'informationL'utilisateur trouve ce qu'il cherche sans réfléchir
Hiérarchie visuelleLes actions prioritaires sont immédiatement visibles
Cohérence des composantsMême comportement pour des éléments similaires partout dans le produit
Feedback utilisateurChaque action déclenche une réponse visuelle claire
Performance perçueLe produit semble rapide, même si le chargement prend du temps
AccessibilitéLisible, navigable, utilisable quel que soit le contexte

At Gemeos, we apply these principles to product interfaces as well as websites. The line between product design and web design blurs as soon as a site incorporates dynamic features: simulators, client areas, dashboards.

How to choose a product design agency?

The decisive criterion: does the agency start with users or aesthetics? A serious product design agency begins by understanding user journeys, existing pain points, and business objectives before touching a single screen. If they propose mockups without conducting user research, that's a red flag.

Also, check their ability to work in short cycles with your product team and deliver reusable components within a structured design system.

CritèreBonne agenceSignal d'alarme
Point de départRecherche utilisateur, audit de l'existantMaquettes envoyées sans brief approfondi
MéthodeCycles itératifs, tests, validationLivraison unique sans aller-retour
LivrablesDesign system, composants réutilisablesFichiers Figma non structurés
CollaborationTravail en tandem avec votre équipe prodTravaille en silo, livre en fin de projet

How much do product design services cost?

The cost of product design services varies depending on the product's complexity, the number of screens, and the level of user research included. For an MVP or a partial redesign, expect to pay between €5,000 and €20,000. For a complete product with a design system, projects often exceed €30,000.

Type de projetFourchette indicativeCe qui est inclus
Audit UX + recommandations2 000 à 6 000 €Analyse de l'existant, points de friction, plan d'action
Design MVP5 000 à 15 000 €Wireframes, maquettes haute fidélité, prototype
Refonte produit complète15 000 à 40 000 €Recherche utilisateur, design system, tous les écrans
Accompagnement continu2 000 à 6 000 €/moisItérations, nouvelles features, cohérence design system

The retainer model is often best suited for post-PMF startups that regularly release new features. Instead of restarting a project with each evolution, the designer is familiar with the product and iterates directly.

What's the difference between UX design and product design?

Product design is an evolution of the UX role. A UX designer focuses on the user experience: user journeys, wireframes, usability tests. A product designer covers all of this and adds a business dimension: they understand growth objectives, technical constraints, and make design decisions that directly impact product metrics (activation, retention, conversion).

UX DesignProduct Design
Focus principalExpérience et parcours utilisateurExpérience utilisateur + objectifs business
Métriques suiviesTaux de complétion, satisfactionActivation, rétention, conversion, revenus
PérimètreInterfaces et interactionsInterfaces + stratégie produit + roadmap
CollaborationPrincipalement avec les devsDevs, growth, marketing, direction

When should product design be integrated into a project?

As early as possible, ideally before writing a single line of code. Design errors are ten times cheaper to fix in Figma than once they've been developed and are in production. In practice, many startups integrate product design too late: after building a functional but difficult-to-use MVP, they call on a designer to "fix" the interface. This is longer and more expensive than starting on the right foot.

StadeRôle du product designImpact
Idéation / pré-seedWireframes, prototype testableValider le concept sans développement coûteux
MVP / seedDesign des parcours clés, design system légerRéduire la dette design dès le départ
Croissance / série ARefonte UX, design system completAméliorer rétention et activation
Scale / série B+Accompagnement continu, nouvelles featuresCohérence à mesure que le produit grandit

What deliverables does a product design agency provide?

The deliverables of a product design project cover the entire chain, from research to production. What distinguishes a good agency from an average one: the quality of the design system delivered. A well-structured design system is what allows your team to continue building consistently without depending on the agency for every new feature.

LivrableFormatUtilité
Audit UXPDF ou NotionCartographie des problèmes et priorités
User flowsFigJam ou MiroParcours utilisateur de bout en bout
WireframesFigma basse fidélitéStructure des écrans avant le design
Maquettes haute fidélitéFigmaÉcrans finaux prêts pour le développement
Design systemFigma avec composantsBibliothèque réutilisable pour toute l'équipe
Prototype interactifFigma ou FramerTestable sans développement
Specs développeurFigma Dev ModeMesures, tokens, comportements documentés

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