The best Dutch software developer for your project is the one that fits your brief, existing systems and way of working. A10Tech, GlobalOrange, Gradify, TopDevs and Zedrox are five providers worth comparing against a defined requirement. This guide explains the approaches they describe publicly and how to test whether those approaches suit your project.
Disclosure: this article is written by TopDevs, which develops software and appears in the list. It is an editorial shortlist based on public company sources checked on 25-09-2026. We have not conducted comparative project testing and do not present an independent ranking. Providers appear alphabetically; the list does not cover the entire market.
If you are still deciding whether to commission software, start with the custom software guide. Sometimes connecting existing software is enough. A suitable developer should be able to explain which parts of your requirement do not need a new application.
How do you choose the best software developer for your project?
Choose on relevant work, a suitable delivery model and verifiable agreements about delivery and maintenance. A familiar client logo or a long list of programming languages does not tell you who will build your application. Ask who will perform the work and have those people discuss a concrete exception in your process.
Define what you need first. An internal client portal involves different choices from a SaaS product you intend to sell to other businesses. Replacing part of an existing application brings different dependencies again. Adding developers to your own team is also a different engagement from outsourcing responsibility for an entire project.
Those distinctions determine which experience matters. Do not only ask whether a provider has worked in your industry. Explore whether it can explain comparable data flows, user roles, integrations and support arrangements. A project in another sector may be closer to your requirement in technical and organisational terms.
Which Dutch software developers could you compare?
The table summarises public positioning. The potential fit is our interpretation; suitability, availability and terms must emerge from your discussion and proposal.
| Provider | Publicly described focus | Potential fit | What to clarify |
|---|---|---|---|
| A10Tech | Web software and adapting existing systems | Renewing an existing application | Migration and support boundaries |
| GlobalOrange | Digital products, UX and SaaS | Building or developing a product | Team structure and product ownership |
| Gradify | SME software and direct developer contact | Business applications or a client portal | Capacity and cover in the proposal |
| TopDevs | Custom applications and integrations, fixed total price including design and development | Supporting your workflow, with bespoke IP owned by you | Agreed scope, acceptance and maintenance |
| Zedrox | Software projects and developer provision | Outsourcing or adding team capacity | Direction and responsibilities |
A10Tech
A10Tech describes web software development, prototypes and adapting existing applications. It also offers systems and network management. That combination provides a reason to discuss software renewal alongside your existing IT environment. Ask which parts form one engagement and how migration, testing and application support are divided. Its public service page does not establish a particular migration approach for your system.
GlobalOrange
GlobalOrange focuses on digital product development involving product management, UX and technology. Its site also describes software modernisation and a SaaS audit. This provides a starting point if you need a product with an ongoing development agenda. Ask how the proposed team will work with your product owner and which disciplines you need. A broad service portfolio does not mean every discipline is included in your proposal.
Gradify
Gradify targets SMEs with web applications, client portals and business software. It describes direct developer contact and a small team that expands with regular freelancers when needed. That may suit a buyer who wants direct discussions with the people building the application. Ask how availability, cover and concurrent projects will work for your engagement, without treating team size alone as a measure of quality.
TopDevs
At TopDevs, we focus on custom applications built around your processes, including connections to existing systems. The Mastone case provides a concrete example: a platform combining portfolio management, online brochures and an investor portal around shared property data. It illustrates a type of engagement; it does not prove we are the best provider for every project. Ask us for the same evidence on scope, delivery and support as the other providers.
TopDevs offers a fixed total price for the complete agreed project, including design and development. You know the full project cost before work starts, without an open-ended bill for development hours. We set out what we’ll deliver and what’s included. If you request work outside that agreement, we discuss and price it before proceeding. Recurring services, such as hosting and maintenance, are listed separately.
Ownership is equally clear: you, the client, own all intellectual property rights in the bespoke work we develop for you. The code is and remains yours. You can have another provider develop it further. Any open-source components and external services retain their own licences, which we make clear. When comparing providers, ask explicitly about both the total price and these ownership terms.
Zedrox
Zedrox describes both full software development and the provision of individual developers or a dedicated team. This gives you different engagement models to explore. First establish whether you are adding capacity to your team or transferring project responsibility. Ask who directs architecture, review and delivery. Supplying developers and taking responsibility for the final result are separate arrangements to discuss.
How do you turn a shortlist into a fair comparison?
Send each provider the same short brief. Describe who will use the software, what work it should support and what already exists. Include a normal journey and a difficult exception. That gives providers the same starting point without prescribing the entire solution before they have investigated it.
For example, suppose employees approve client requests before sending them to an existing administration system. Ask each provider what happens if a request changes after approval or the integration temporarily fails. You are assessing how they ask questions and define boundaries, not how many screens they can promise during a sales call.
Use the same categories for your notes: understood objective, known data sources, named responsibilities, testable approach and visible open questions. For every judgement, record the answer or document behind it. A score without supporting evidence simply gives a precise-looking shape to an impression.
Make room for a different proposal too. A provider may recommend changing the configuration of an existing package. That need not indicate a lack of ambition. Ask what that route solves and which limitation remains. A new platform and a focused addition can both be reasonable answers to different versions of the same brief.
For an international engagement, include working language, meeting arrangements and the people who will approve decisions. A Dutch office address does not by itself establish where everyone works or how communication will happen. Confirm the delivery setup for your project, using the same questions for every candidate.
What evidence should you request about team, technology and quality?
Ask for a relevant case discussion that exposes decisions and boundaries. What did the provider itself deliver? Which parts came from other parties? How did the application change once people started using it? A case becomes more useful when you can identify the experience that transfers to your own engagement.
Then speak to someone who will contribute to the project. Discuss who develops requirements, who builds and who reviews changes. With a larger team, ask how handovers work; with a smaller team, ask how knowledge is shared and absence covered. The clarity you need is the same even when the organisation differs.
Have the provider explain how it determines whether a component works. Ask for examples of acceptance criteria, a demonstration in a test environment and the handling of a defect. For an integration, look beyond a successful transfer to the handling of missing information and duplicate messages.
If AI is used during development, ask who reviews the output and what checks happen before release. A tool or model name does not prove that business rules, access permissions and recovery behaviour are correct. Assess accountability and demonstrated behaviour regardless of how much code is written manually or with assistance.
A certification may matter to your procurement process. If so, check the organisation, activity and period it covers. This article does not attribute certifications to providers or infer anything about their security from the absence of a mention.
How do you compare proposals beyond the price?
First compare what each provider expects to deliver. Do both proposals include data migration, testing, integrations, launch and user guidance? What does your own team still need to do? A lower price may cover a smaller engagement, while a higher price may include work you would otherwise organise yourself.
Ask which assumptions underpin the proposal. A supplier may still need to grant API access, or someone may need to clean up older records. Establish who investigates those dependencies and what happens if an assumption proves wrong. You can then assess the price in the context in which it was offered.
The same applies to changes. Agree how new requirements will be discussed, what counts as fixing a defect and who approves a revised scope. Both a fixed price and time-based work need clear boundaries. The custom software cost guide helps you assess those elements separately.
Include the period after launch. Ask what support covers, how issues are reported and who handles updates or new requirements. Have recurring work and external services listed separately. There is no price ranking here: we have not requested comparable quotations for one identical engagement.
What should you establish about handover and continuity?
Ask which code, documentation, accounts and data you will receive at delivery, and what access you have during the project. Have the provider describe handover as though another developer will eventually continue the work. A folder of source code says little about the settings, external services and build steps needed to run the application.
Discuss who can perform a recovery action and who has the access required. Consider restoring data, deploying a version again and changing permissions when a colleague leaves. You do not have to carry out those technical tasks yourself, but you need to know where responsibility sits.
Where continuity depends heavily on a supplier, software escrow may be worth discussing. It does not replace usable documentation, current access and a workable handover process. The appropriate arrangement depends on the application and existing agreements.
Also establish what happens if you stop working together. Which outstanding work will be completed, what will be transferred and how will a successor receive an explanation? Discuss those questions before the engagement starts. A clear answer helps both you and the provider define the work.
How do you actually get started?
Describe your engagement on one page: users, process, existing systems, dependencies and the first improvement you want to test. Choose providers whose described approach fits that brief. A firm outside this shortlist may also be suitable; use the same questions to assess it.
Hold the discussions using the same examples and keep the answers side by side. Resolve uncertainties before agreeing a full development engagement. If major choices remain open, a bounded discovery exercise or trial may be a suitable next step, with a defined result on which to base the next decision.
Want to include TopDevs in that comparison? Book a call. We can discuss your requirement and explain what we would investigate, build and hand over to your team.
