Custom software
Custom software, built around the way you work
Software built around the way you work. A fixed price agreed up front, 100% ownership of the full source code, and AI only where it genuinely saves time.
Clients rate us 4.9
- Fixed price up front
- You own 100% of the code
- In-house cybersecurity specialist
Built for, among others
The problem
What gets in the way
Off-the-shelf software is fine right up until your process stops fitting the boxes.
Your process doesn't fit standard software
You calculate in Excel, paste data between tools or keep a shadow administration because the package doesn't quite do what you need. It costs hours every month.
Work gets done twice
Notes taken on site that you type out again at home, or a calculation you check by hand. You do that work twice now.
You're locked to one supplier
Outdated software nobody develops any more, or a builder who keeps the source code locked away. When you want to change something, you're stuck.
Open-ended quotes
Projects that start with an estimate and end with a bill you didn't see coming. You want to know upfront what it costs and what you get.
How we look at it
Then you start building workarounds in Excel, retyping the same data twice, or paying for twenty features you never touch. Custom flips that around. The application is built around the way you already work, with only the logic and the screens you genuinely use.
Read more
We have built applications like these for dozens of clients, in all kinds of industries. We are honest about when custom is the wrong call: if an existing package will do, we say so. We think along with you: we listen first to what you want to achieve now and where you are heading, then choose the technology to match, for the most scalable and powerful result that is cost-efficient at the same time.
What we build
How we help
We start with how you work: which steps, which decisions, where it goes wrong. We draw the application around that, so the software follows your way of working.
Your app isn't an island. We connect it to the tools and systems you already use, so data lands in the right place by itself and you enter nothing twice.
Where it demonstrably saves hours, we build AI in: an archive you search in seconds with source references, or texts the app drafts itself.
The app produces reports, advice and invoices from your own data: an advice as a Word document with the matching invoice in one click.
The full source code is yours, with technical documentation and a proper handover. You can continue at any time with your own team or another party.
What we built
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Reviews
What our clients say about us.
4.9 · based on client reviews
From spreadsheet to a real platform
“They turned our scattered spreadsheets into a full real-estate platform, including WWS calculations and an investor portal.”
Philippe van der MarkMastoneThought along, delivered fast
“A team that thinks along and delivers: quick to act, cleanly shipped and exactly what we had in mind.”
Nico WerkmanDecathlonA beautiful website our members love
“TopDevs delivered a beautiful, fast website where our members and new runners find their way around right away.”
Huub SteinmannLoopgroep Grave
Our approach
From idea to working software in four phases
Every project runs through the same four phases, so you always know what's happening, what comes next and what it costs, from first call to live software, usually in weeks rather than months.
- 01Phase 1Free intake
Understand & analyse
Everything starts with a good conversation. We map your goals, processes and the bottlenecks worth solving: no sales pitch, just an honest read on where the biggest win sits.
- 02Phase 2Free blueprint
Blueprint & quote
We turn the analysis into a blueprint: a clear plan showing exactly which steps we'll take and why, paired with one fixed quote. You know up front precisely what we build, what it costs and when it's done, so the bill can't surprise you afterwards. And that blueprint is free and without obligation.
- 03Phase 3Prototype in days
Build, test & deploy
Then we build, in short iterations. You see a working prototype in days and a finished product in weeks. We work on a modern, AI-native and secure stack, with data protection and GDPR in mind from day one.
- 04Phase 4100% your code
Implement & optimise
We launch, hand over the full codebase and keep improving on your terms. You get 100% ownership of the code we write. Hosting and maintenance are optional.
What you always get
Fixed price
Agreed up front.
100% code ownership
Your code, fully yours.
Live in weeks
Prototypes in days, finished in weeks.
Modern & secure
A scalable stack that always integrates with the latest tech. Secured by our in-house cybersecurity experts.
Tools & tech
We build on the tech that fits you
We build on the technology that fits you best. If you already work with a certain stack (.NET, PHP or something else), we simply build on it. Starting fresh? Then we draw on years of experience to pick the technology that's strongest for your situation. You only migrate when it gains you something.
- A working application whose code is fully yours
- Technical documentation and a clean handover to your team
- Integrations through APIs with your existing tools and systems
- A fixed price agreed up front, no open ends
- An optional maintenance and further-development arrangement after delivery
Faster Delivery. Fixed price. Forever your code.
Traditional agencies make software feel risky. Topdevs makes the project clear before we build.
Frequently asked questions
What is custom software?
Custom software is an application built specifically for your business, around the way you work, instead of an off-the-shelf package you share with thousands of other users. For example an internal tool, a client portal, a planning system or a dashboard that follows your exact steps. The difference from a package: you decide what goes in, you don't pay for features you never touch, and the code is yours.
When is custom better than an off-the-shelf package?
Custom pays off the moment you have to rebuild your process to fit a package, or when you stay stuck in Excel and loose tools because the standard product doesn't quite do what you need. If your way of working fits an existing tool fine, we say so. Custom isn't a goal, it's a choice that only makes sense when it saves time or errors.
What does custom software cost?
It depends on the scope, but you always get a fixed price agreed up front. We map your process first, break it into pieces, then quote for what you genuinely need. Want to start small? You can do that as an MVP.
How long does it take to build a custom app?
Smaller applications often go live within weeks; larger projects in a fraction of the usual time. We work AI-native and in short iterations, so you see working versions quickly.
Who owns the code when you build the app?
You do. You get the full source code in hand, with documentation and a handover. You can continue at any time with your own team or another party. We keep nothing locked away.
Can the app connect to the tools we already use?
Yes. We connect your application through APIs to your existing systems, databases and software, so data ends up in the right place automatically and you don't enter anything twice. Exactly which integrations you need is something we settle while mapping your process.
Can we start small with an MVP?
Absolutely. We often build an MVP first: the core of the application that solves the main problem, so you test it in practice before expanding. If it works, we keep building on the same codebase in iterations. If it doesn't, you've lost very little.
Contact
Ready to build?
Send us a message or book a call straight away. We're happy to think through the best approach with you.
