Custom UX/UI design: apps, websites & SaaS

Apps, websites, SaaS, internal tools: we design your product end to end, from the user experience down to the smallest interface detail, and we hand it over ready to build.

Whether you're starting from a blank page or rebuilding an existing product, our team is with you the whole way.

Talk about your projectSee our designs

50+

projects delivered

week for the first mockups

Build-ready

Figma files your developers can use straight away

dedicated designer, start to finish

A good product presented badly is a product that doesn't convince. Whether you have an idea to launch or a product to modernise, design is the first signal you send to your users, and it's often the reason they buy. You'll probably recognise yourself in one of these two situations.

Your product works, it converts, but it's starting to look dated?

The interface was built fast, piece by piece, as the product evolved. Today the journey isn't clear, the design is inconsistent from one screen to the next, or simply out of step with what your users expect. You can feel it in customer feedback, in retention or drop-off rates, but you don't know where to start. Your competitors have polished interfaces, and that often makes the difference.

You have an idea, but no visual or artistic direction yet?

You know what your product has to do, what problem it solves, who it's for. But what it should look like, how you move through it, how it feels to use — that's still fuzzy. Launching a product without that direction means risking something lopsided: something that works, but doesn't make anyone want it, doesn't convince on the first screen, and will have to be redone sooner or later.

In both cases the problem is neither technical nor strategic: design simply isn't doing its job. Design that does its job isn't seen, it's felt. Users move naturally, without friction, guided from entry point to checkout without even noticing.

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UX and UI are the two sides of digital product design. We design them together, never one without the other.

Design is often seen as the final touch, the decoration you add once the product works. In reality it's rather the opposite: the user experience is what decides whether your product is adopted or abandoned. Users form an opinion in seconds, and they don't give you a second chance.

On a website or a SaaS, design drives your sales

88%

of visitors never come back after a bad user experience.

Source: Forbes

Why?

A confusing journey, a button no one can find, a page torn between three messages: at every friction point you lose visitors who were genuinely interested. Clear design guides people naturally towards the action — sign up, buy, request a demo. The same offer, with a well-designed interface, converts better than one drawn at random.

On an app, design drives retention

+15 to 40%

retention (D7/D30) after an onboarding redesign, because users reach the app's first value faster.

Source: Simpalm

Why?

A user who doesn't understand how to use your app the first time won't come back. Onboarding, fluidity, clarity of screens: that's what turns a download into a habit. The best product in the world is useless if people don't understand it before they've used it.

On an internal tool, design saves time

-40 to 60%

learning time with a well-designed interface, and fewer support requests.

Source: Nielsen Norman Group

Why?

A badly thought-out business tool means hours lost every day by your teams, data-entry errors and endless training for every new joiner. A clear interface does the exact opposite: it makes your teams faster and more autonomous, on a tool they actually enjoy using.

In all three cases the conclusion is the same: design isn't an aesthetic expense, it's an investment you can measure — in sales, in loyalty, in productivity.

At Horizon Factory, UX and UI are part of a single engagement. No artificial split between "research" on one side and "visuals" on the other, with separate quotes and separate teams. We design the experience and the interface together, because a well-thought-out screen that's badly drawn frustrates just as much as a beautiful screen nobody understands.

Complete mockups

We design every screen of your product, from the entry journey (onboarding, sign-up, first use) to the payment page, including empty states, error messages, loading screens and no-results pages. It's often the care given to these "secondary" screens that separates a product that feels finished from one that leaves users stuck. Our engineers and designers review every scenario together, for a complete journey with no gaps.

Animations and micro-interactions

The more alive and interactive a product feels, the more people like it. Rather than static screens strung together, we design the transitions between screens, the reactions to a click, the way a menu appears. These details guide the user, make the interface intuitive and create that sense of fluidity that inspires trust. We specify how each interaction should behave, not just what it looks like.

Clickable, commentable prototypes

You don't just get a series of frozen images. We deliver clickable prototypes: you move through the product as if it were real, screen by screen, to feel the experience before a single line of code. These prototypes are also commentable: you ask your questions and point out exactly what you want adjusted, directly on the mockup. Feedback loops stay clear and tracked, and everyone is talking about the same screen.

Design delivered ready to build

Our design is built from the start to be easy to implement. Unlike classic CMSs, which are often limited, we build tools that give you far more freedom: blocks take whatever shape you want, with the spacing, colours and behaviours of your choice. No "sorry, that's not possible" at the end of the project. And whether or not design is your thing, we adapt: we guide you, then show you how to take over so you can keep evolving the product.

"100% customisable. No more CMS constraints. Your imagination is the only limit."

See our work

Whatever your product, we design it. Our scope covers every kind of digital interface, and extends all the way to your brand identity.

Recurring design needs?Discover our on-demand talent service

You don't always need a full-time designer — sometimes you just need occasional or regular reinforcement. We join your team whenever you want: a few pages to design, a feature to dress up, a hand when the workload spikes. And since it's always the same designer working with you, there's no need to explain everything again each time. You draw on our expertise when you need it, without a full-time hire and without the stress of recruiting.

Discover our on-demand talent

Whether you're starting from a blank page for a new product or modernising an existing site or app, our approach stays the same: design that makes sense for your users and is ready to build.

Designers often create what's on the surface but rarely think about the technology that has to bring it to life — and that's where things get complicated. Here, designers and developers work side by side, and many can do both: when we draw a screen, an animation or a component, we already know how it will be coded.

Nothing lost in development

The design you approve is exactly the design that gets built — not a "similar" version reinterpreted by developers who had no part in creating it.

Fewer back-and-forths, faster delivery

Because technical constraints are built into the design from the start, we avoid endless correction cycles between design and development. The project moves faster.

A design that's ambitious AND buildable

We don't hold back: we design rich, polished interfaces — but we do it knowing exactly what's achievable. We don't hand you a pretty file and cross our fingers: we hand you a design we'd be able to code ourselves, and that we can build for you if you want.

Good design doesn't come from a brief thrown into the void, but from a continuous conversation. Our process is simple, fast and transparent: you know
at every step where we are and what comes next.

The scoping call
Week 1
We take the time for you to explain your project, your goals and your expectations. If you're starting from scratch with no clear visual direction, we create a moodboard that sets the world, the colours and the tone. If you already know where you're going (existing guidelines, a product to evolve, a precise idea), we go straight into Figma, with no unnecessary step.
The +Either way, we start from a shared, approved base, which keeps the timeline tight.
Iterations, with weekly calls
Weeks 1 to 3
We imagine, we design, you react and we adjust. The design moves forward through regular feedback loops, paced by a weekly call with your project manager or your dedicated designer. You watch the product take shape week after week and comment directly on the mockups.
The +No tunnel effect: you never wait weeks to discover a result that isn't what you wanted.
Delivery
Week 3
Once the design is approved, you get a complete, organised, ready-to-implement set: mockups, components, clickable prototypes. Everything is structured so the handover to development happens without friction, by your teams or by ours.
The +And above all it's fast: when you already know what you want and reply quickly, the first mockups can be ready in under a week.

Meet our designers and engineers

Week 1Week 2Week 3

The scoping call

Week 1

We take the time for you to explain your project, your goals and your expectations. If you're starting from scratch with no clear visual direction, we create a moodboard that sets the world, the colours and the tone. If you already know where you're going (existing guidelines, a product to evolve, a precise idea), we go straight into Figma, with no unnecessary step.

The +Either way, we start from a shared, approved base, which keeps the timeline tight.

Iterations, with weekly calls

Weeks 1 to 3

We imagine, we design, you react and we adjust. The design moves forward through regular feedback loops, paced by a weekly call with your project manager or your dedicated designer. You watch the product take shape week after week and comment directly on the mockups.

The +No tunnel effect: you never wait weeks to discover a result that isn't what you wanted.

Meet our designers and engineers

The interface of a complete EdTech platform, where pedagogical richness never costs you clarity.

Context: Co-Gito is an EdTech web platform combining interactive content and neuroscience. It lets trainers and training organisations build engaging courses by centralising many teaching formats: text, video, quizzes, interactive exercises, flashcards.
Challenge: Making an inherently rich product feel simple. With that many formats and functions, the platform risked becoming unreadable. The design challenge? Make building a course as simple as filling in a form, without ever sacrificing pedagogical depth.
What we did: We redesigned the entire platform, through close feedback loops with the team. We designed a "What You See Is What You Get" no-code editor, a clear structure by chapter and by skill, a quiz editor with feedback, assessment screens with scoring and progress, and a tracking dashboard. All carried by a mascot and a consistent brand identity we built together.
Result: A complete, consistent, build-ready interface that makes a complex learning platform accessible. A powerful tool on features, but simple and engaging for users, so learning becomes a pleasure again.

See how we simplify a feature-rich product

See all our projects

These projects have one thing in common: on each of them, the design disappears. The user moves forward without thinking about it. To see how much that changes, let's run a simple test.

Pick the interface that appeals to you most.

Shall we talk about your project?

No vague deliverable, no "final file" you can't actually use. At the end of every engagement, you walk away with a concrete, organised, ready-to-use set of files.

See our work

Custom UX/UI design

From€1,000 – €2,000depending on scope: number of screens, complexity, from scratch or redesign

Branding and logo creation generally start between €500 and €1,000, and product consulting is €100/hour. In every case, we give you a clear, costed proposal before we start.

Get a free estimate

Answers to the questions we're asked most often about UX/UI design.

Both. We can design a product entirely from a blank page (new SaaS, MVP, app) or take over an existing site, app or tool to rebuild and modernise it. We adapt to your starting point.

Discuss my project

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Your product works, it converts, but it's starting to look dated?