Do you want to offer software subscriptions to multiple customers? We build a new SaaS product with attention to users, separated customer data and daily operations. Together, we define the first version and how to extend it responsibly.
Copyright in the custom code is always transferred to you
Customer data, subscriptions and operation designed together
Clear guarantees covering costs, software and security
SaaS development
A SaaS solution is software that is managed centrally and accessed by customers or users over the internet. This calls for different decisions from a one-off application. Onboarding, support, security, releases and customer expectations belong in the product from the start.
We define how organisations and users are structured, how customer data stays separated and which permissions apply within each customer environment. Subscriptions, user limits and billing follow your business model. Where customers share a product foundation, data isolation receives explicit tests. Integrations, monitoring, backups and incident arrangements make ongoing operation concrete. These are design questions for your product; its requirements determine the technical setup.
New development projects typically start from around €25,000. This is an indicative starting point, rather than a fixed package price. We account separately for integrations, migration, hosting and maintenance. You receive an estimate by component with assumptions and risks.
Discuss your project
Fintech · Getsby
For Getsby, we built an app that lets users buy, top up and manage virtual payment cards. Several financial providers work behind that app. Every movement of money needs to be traceable, including when a payment doesn't go as expected.
We made transactions traceable and structured the integrations so financial providers could be replaced. When a payment route proved insufficiently reliable in practice, we could replace it without rebuilding card management.
Early engineering decisions determine how much freedom you have later. Tests and monitoring help us keep checking that foundation as the product evolves.
Explore the engineering decisions behind Getsby
Manufacturing · Zetprofiel
For Zetprofiel, we built an order portal where customers and staff can draw steel profiles and calculate their properties. The software calculates materials, weight and price, then generates a work order for production. It replaces manual redrawing and gathering data from separate sources.
One engineering challenge was the geometry: how do you display dimensions and angles on complex shapes without labels overlapping? And how do you keep the drawing legible on a printed work order?
We separated the calculations from the controls and rendering. That let us add bend corrections later without rebuilding the drawing tool. Together with Zetprofiel, we use real profiles to keep improving the software.
Explore Zetprofiel's order portal
Toon Van Dooren
Lead Innovation Engineer at Savvii Managed Hosting
Esther Radder
Workplanner Product Manager at SGI Compliance Nederland
Antoon Scheffers
IVBB
Stephan Koning
Project Manager at Betty Blocks
A company of developers
Apart from Bas in sales and Linda in operations, everyone at 10KB is a developer. We don't employ project managers, designers or marketers. Software development is our craft, and our company is built around it.
You explain your requirements to the people writing the code. We make the technical choices understandable: what are the options, and what does each mean for reliability, security, costs and maintenance? You don't need to be a programmer to take part in those decisions.
Together, we choose what best fits your challenge. We keep considering those trade-offs throughout development, as usage grows, requirements change or a simpler solution becomes possible. Coordination, planning and explanation are part of our developers' work.
How direct contact with developers works
Ewout Kleinsmann and Roland Boon
Ewout and Roland were already programming together as students. That led to the founding of 10KB in 2013. They still do what brought them together: build software.
They contribute to all our projects every day. Their working day revolves around code: programming, reviewing colleagues' work and making technical decisions. When you discuss your software with them, you're talking to people who help build the solution themselves.
Ewout guides projects from the first outline through to delivery, keeping an eye on how the parts work together. Roland sets the technical direction and focuses on code quality, security and maintainability. You'll find them working alongside the other developers.
Meet the whole team
Agreements before the first line of code
Where a cost guarantee is agreed, the pessimistic estimate in the proposal sets the maximum for unchanged functionality and assumptions. If the work takes less time, you pay for the hours actually worked. We estimate new requirements separately.
We fix faults arising from our original development at no extra charge within the agreed scope and warranty period. The proposal specifies that period. We also agree on aftercare in advance: how to report problems and who handles them.
We address delivery findings from an agreed independent security audit at no extra charge within the agreed audit and project scope. The guarantee covers fixes to the delivered solution. New security requirements outside those agreements aren't included.
A maximum for an unchanged scope
Where a cost guarantee is agreed, the pessimistic estimate in the proposal sets the maximum for unchanged functionality and assumptions. If the work takes less time, you pay for the hours actually worked. We estimate new requirements separately.
Your investment, your software
We always transfer copyright in the custom code we develop for you. You can develop the software further, build an internal team or continue with another supplier.
We make that practical too, with access to the source code, documentation and necessary accounts. Wherever possible, hosting and external services are registered in your name. Third-party libraries and services remain subject to their own licences and terms.
You stay with us because the collaboration works. Your software doesn't tie you to us.
Our intellectual property agreements
From the first conversation to daily use
You know your product, users and ambitions. Together, we turn them into a technical approach. We explain the options and trade-offs so you understand what we're building and why.
01
Which customers will you serve, and what problem does the subscription solve? We define the first use case, roles, customer boundaries and subscription rules, including who operates the product and which integrations are essential.
02
We estimate product features, customer setup, subscriptions and essential integrations. Security, data isolation and operation belong in the initial scope. Features needed only at a later stage stay separate, keeping the first version focused.
03
You review working software from different customer and role perspectives. Tests check access and data separation. We agree on onboarding, monitoring, incidents and releases so the product can be maintained after its initial introduction.
Our strength is software engineering. It is particularly valuable when the technology determines what your business can do and how reliably you serve your customers.
Unsure which route fits? We're happy to discuss whether our engineering expertise would add value to your project.
Not necessarily. We assess a shared product foundation, separate environments or a combination against security, customer requirements and operational needs. Multi-tenancy is one option rather than a requirement for every SaaS product.
Yes. That starts with the current code and customers. See ongoing SaaS development for handover, backlog, releases and development capacity for an existing product. A retainer around €4,000 per month may suit that work.
New development projects typically start from around €25,000. This is an indicative starting point, rather than a fixed package price. We account separately for integrations, migration, hosting and maintenance. You receive an estimate by component with assumptions and risks.
We agree aftercare and the warranty period in advance. Maintenance, security updates, hosting and availability receive suitable ongoing arrangements. For continued development, a retainer around €4,000 per month may fit, depending on your software and required capacity.
Share your project details and examples with Ewout. Bas usually handles the introduction, with Ewout or Roland joining for the technical discussion. During the project, you work directly with developers. An introductory conversation comes with no obligation.
Ewout
Tell us which workflow your software needs to support, who will use it and which systems are involved. Share the initial features and budget you have in mind. We discuss scope and the next step. Call +31 24 669 05 18 or email Ewout.
CONTACT
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