From your idea to an app with impact.
Design-first software studio in Veenendaal.
- From idea to working app, fast
- Built so your business can grow with it
- Easy to use
Web app / Integration, 2026
Leads from Webflow straight into Salesforce
Web app / Bookings, 2026
Booking villas on their own website
AI / Automation, 2026
An AI email assistant that learns with the team
Web app / Planning, 2026
Planning board for asbestos removal crews
Automation / Integration, 2026
Vacancies from Teamtailor straight to the careers site
Built together with strong teams
Having an app built is quite exciting.
It's a significant investment and you want to be sure you're building the right thing: something people actually use and that has a positive impact.
That's why we start design-first: we map out your problem, target audience and goals clearly and translate that into clear flows and screens.
We test those concepts early with real users. That tells us where to focus before a single line of code is written.
Only then do we start building. Iteratively, together with your team, so that what emerges is pleasant to use and moves your business forward.
After more than ten years of building apps we keep seeing the same thing: the biggest gains are at the start, in getting clear on what people need before you build. Complicated is easy. Simple is the hard part, and that part is our job.
Our process
Understand
We map out your needs, target audience and goals clearly. What's the context? What needs to happen? We translate that into a clear action plan and initial setup.
Design
We turn insights into wireframes, prototypes and interactive flows, and put them in front of real users early. Their reactions tell us where to focus.
Implement
Only then do we start building. Iteratively, together with your team, testing with real end users and refining until the app is pleasant to use and earns its place in the workday.
Grow
After launch we stay involved. A solid foundation makes it easy to keep building, and we like thinking along about what could come next. If your team wants to take over, we'll teach them how we work.
Understand
We map out your needs, target audience and goals clearly. What's the context? What needs to happen? We translate that into a clear action plan and initial setup.
Design
We turn insights into wireframes, prototypes and interactive flows, and put them in front of real users early. Their reactions tell us where to focus.
Implement
Only then do we start building. Iteratively, together with your team, testing with real end users and refining until the app is pleasant to use and earns its place in the workday.
Grow
After launch we stay involved. A solid foundation makes it easy to keep building, and we like thinking along about what could come next. If your team wants to take over, we'll teach them how we work.
Our services
Our projects
Projects where we solved real business problems.
Web app / Integration, 2026
Leads from Webflow straight into Salesforce
A forms engine, TCO calculator and partner portal for EV Company's new Webflow site. Every request lands in Salesforce automatically.
Web app / Bookings, 2026
Booking villas on their own website
A custom booking and payment flow on the Homes of Croatia Webflow site, fed by Guesty and updated automatically every night.
AI / Automation, 2026
An AI email assistant that learns with the team
A customer portal that reads incoming email, drafts replies from its own knowledge base and suggests improvements every week. A person approves everything.
What clients say
On Catalyst in the Mendix apps of Banijay Benelux
“Thanks to Catalyst, we no longer have to worry about front-end development or stress over how to get the styling right. It also makes us more aware of when we deviate from standard components, and if we do, why it's necessary. This allows us to build and maintain our apps faster, more consistently, and with shorter lead times.”
Lead Mendix Developer, Banijay BeneluxOur experts
Robin van Schuppen
Sales & UX specialist
Maxim Vellinga
Product Engineer & (AI) automations
Aart den Braber
Back-end, front-end, UX & test specialist
Ronnie van Doorn
UX Designer & Mendix specialist
Frequently asked questions
Ready to get started? Questions?
We're curious about your challenges and ideas. Schedule a no-obligation meeting and we'll gladly walk you through our process.
- Completely no-obligation
- Great coffee at our office