Exactly what your product needs. Done right.

From redesigns to feature builds, we tackle custom projects with speed, precision, and zero stress.

Starting at €10,000

For founders and teams who need specialized support

Product Redesigns

Give your product the refresh it deserves.

New Features

Seamless additions your users will love.

Product Strategy

Expert insights tailored for your growth.

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collab

Who we work with

You've got a product to build, and it should feel effortless. If it doesn’t, we’ll fix it.

Early‑Stage Founders

Big idea? Let's make it real. We’ll build a working MVP with low-code, so you can test and pitch.

Startups

Users dropping off? We fix friction points so they stay longer, convert faster, and love using your product.

Growing Companies

Scaling shouldn’t be a headache. We help keep your UX smooth, simple, and ready for what’s next.

results

Redefined products

We don’t just make things look good. We make them work better, faster, and smarter.

Investor-Ready MVP

Helped a startup build and demo an MVP that wowed investors and secured early buy-in.

Pet Longevity Platform

Completely revamped a longevity app, helping pet parents extend their pets’ lives worldwide.

"The team at 23harmony are not just superb designers but also product experts, ensuring a meticulously planned user experience. We highly recommend them to startups or companies looking for amazing, flexible design solutions."

Matt Keyes
COO at MyPetGo

"We demoed the MVP in our recent board meeting to the investors & advisors last week and received great feedback for it! Everyone was really impressed about the tool, which has been created in such a short time. These credits go all to you for the design!"

Schirin Yazgan
Head of Product at XO Life

Internal Tool → SaaS

Transformed an internal tool into a powerhouse SaaS suite — built in record time.

UX for Growth

Simplified a growing startup's UX, increasing activation rates and reducing drop-offs.

benefits

Why work with us?

We keep things simple: clear processes, fast iterations, and designs that work.

Boutique Approach

We work with only a few clients at a time for a truly personalized experience.

Proven methods

We share our own builds publicly. See what works in real time.

Seamless collaboration

From idea to launch and beyond, we stay by your side.

AI‑Enhanced Prototyping

Faster, smarter, and built for modern product needs.

What exactly counts as a custom project?

Anything outside the scope of our standard offerings such as web/app redesigns, new feature launches, unique UX challenges, or strategic product support. If your product needs it, we can do it.

How collaborative is the process?

As collaborative as you wish! You’ll always be informed and involved, but we handle all the heavy lifting.

How do you handle pricing and timelines?

Pricing and timelines are tailored specifically to your project. After an initial discussion, we provide clear estimates, with no surprises.

Can you work directly with our dev team?

Absolutely. We regularly collaborate closely with client teams, providing clear handoffs and ongoing support.

Ready to scale your product to new heights?

If world-class design and meticulous attention to every detail is what you're looking for, then you're in the right place.

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