UX UI design for online stores
A store that makes sense at first glance
We design clear, accessible, on-brand shopping experiences based on how your customers really browse and decide.
Tools and platforms
They trust Trilogi
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Design
Design and usability (UX & UI) for eCommerce
Good online store design doesn’t start with color or typography, but with understanding what your customer needs to buy without friction. At Trilogi we combine user research, information architecture and visual design to create attractive, easy-to-use eCommerce sites, mobile first. We work with design systems that keep brand consistency and speed up development, we take care of accessibility and validate every decision with prototypes and tests with real users. AI helps us analyze behavior and generate variants; our design team brings the judgment.
- Consulting
- AI
- Marketing
- Design
- Technology
since 1999
The challenge
User experience problems holding back your sales
Confusing navigation
Menus and categories designed from inside the company, not around how customers search, make them get lost before finding the product.
Mobile as an afterthought
Most visits come from mobile, but the design was conceived for desktop and adapted later.
Inconsistent branding
Each new page or campaign adds different styles and the store loses personality and trust.
Accessibility barriers
Poorly handled contrast, forms and keyboard navigation shut out users and expose you to legal requirements.
Good design doesn’t get noticed: it just works
What we do
What we do in eCommerce design and UX/UI
From discovery to final design, with validation at every step.
UX research
We analyze analytics data, heatmaps and session recordings, and interview users. That way we know what works and what doesn’t before designing.
Information architecture
We organize categories, filters and menus according to your customer’s buying logic. We define the shortest path to the product and checkout.
Prototyping
We create wireframes and clickable prototypes to validate flows with your team and with users. Fixing things in the prototype is much cheaper than in production.
UI design
We design the visual interface for the home page, categories, product pages, cart and checkout, mobile-first. An aesthetic aligned with your brand and built to convert.
Design system
We document reusable components, styles and usage rules. Your store grows without losing consistency and development is faster.
Accessibility and usability testing
We review the design against WCAG guidelines and test it with users. We spot friction points and propose prioritized UX/UI improvements.
How we work
How we design your online store
Discovery
Business goals, customer profile, catalog and analysis of current behavioral data.
Architecture and flows
We define the navigation structure and key journeys to purchase.
Prototype and validation
Wireframes and clickable prototypes that we test before moving into visual design.
UI design and design system
Complete visual design and a component library ready for development, whatever your platform.
Testing and optimization
After launch we continuously measure, test and improve the experience.
What’s included
What the UX/UI design project includes
Who it’s for
Who this service is for
Brands redesigning their store
Companies whose eCommerce has become outdated or no longer reflects their brand.
New online store projects
Businesses launching or migrating their eCommerce that want to start with a solid UX foundation.
B2B eCommerce with a complex catalog
Manufacturers and distributors that need easy-to-use search, quick ordering and customer areas.
Frequently asked questions
What we’re often asked.
What’s the difference between UX and UI in an online store?
UX, or user experience, makes buying easy: structure, navigation, flows and the logic of each step. UI, or user interface, is the visual layer: colors, typography, buttons and images. In eCommerce the two go together, because a beautiful interface with confusing navigation doesn’t sell, and vice versa.
How much does UX UI design for an online store cost?
It depends on the number of templates, catalog complexity, whether there’s a B2B component and the level of research and testing you need. That’s why we start with a discovery session and present a fixed proposal by phases, with specific deliverables for each one. That way you know exactly what you’re investing and what you’ll get.
Do you design for Shopify, PrestaShop or other platforms?
Yes. We adapt the UX/UI design to the chosen platform, whether Shopify, PrestaShop, LogiCommerce, commercetools or another. We know each one’s possibilities and limitations, so we design something that can be built without surprises. If you haven’t chosen a platform yet, we’ll also help you decide.
What is a design system and why do I need one?
It’s a documented library of components, styles and usage rules: buttons, product cards, forms, typography or spacing. It lets any new page or campaign stay on-brand, reduces errors and speeds up design and development work. It’s especially useful for growing stores or those with several teams.
Why is accessibility important in eCommerce?
Because an accessible store can be used by more people, including those with visual, motor or cognitive disabilities, and because European accessibility regulations already apply to many online stores. Plus, many accessibility improvements, such as good contrast or clear forms, improve the experience for all users.
Next step
Our business is to grow yours
Show us your store and we’ll tell you what we’d change to make buying from it easier.