Custom apps and SaaS products on .NET 10 and Umbraco 17. AI-assisted development means working products in days or weeks, not months.
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Most agencies quote three months and a five-figure spec phase. We quote days, and start this week.
Where we can scope it, we fix it. No open-ended hourly bills, no surprise extras, no change-request theatre.
Claude Code handles boilerplate, repetitive patterns, and documentation. We stay on architecture and the hard calls.
.NET 10, Umbraco 17, Azure, SQL Server. Technology that will still work in five years, not last month's framework.
Not a prototype. Tests, CI, monitoring, and real infrastructure from day one. It goes live and stays live.
Your code, your repo, your infrastructure. No vendor lock-in, no proprietary magic, no dependency on us staying around.
A product concept, a business problem, or a hunch something could work better. We'll help you figure out what's worth building and what's not.
A focused brief that prevents scope creep and keeps delivery fast. Fixed pricing where possible, realistic timelines always.
AI-assisted development on a proven .NET stack. A production-ready application with proper architecture, documentation, and a codebase you own outright.
Fast does not mean flimsy. When we ship in three days, what we hand you is a production application with tests, monitoring, deployment pipelines, and documentation - not a clever-looking demo that falls over at the first user.
We have been doing this long enough to know where the corners get cut in rushed work, and we do not cut those corners.
Whether it's a SaaS product, a platform, or something you've been sketching on the back of a napkin. We ship things that work.
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The ones we get asked most. If yours isn't here, send us an email.
Starting a rapid development project involves a scoping call, a fixed-price proposal, and a signed agreement, and the build itself usually kicks off within two weeks of signature, often inside 10 working days. Scoping happens before we start, not on your invoice: the proposal fixes the price, the deliverables, and the definition of done, so day one is spent building rather than negotiating. Data from our project history sets the pace you can expect once we begin: Sumlo, a timesheet-to-report SaaS, went from idea to shipped in three days, and Patch went from brief to finished product in three weeks. AI-assisted development, with Claude Code as our default toolchain, is what makes that speed possible without cutting corners, because the slow parts of software, such as boilerplate, scaffolding, and test plumbing, are compressed while design and review still get human attention.
Yes. Rapid development is not only for greenfield builds; we regularly pick up half-finished products, stalled rebuilds, and legacy .NET or Umbraco codebases that another team started. Every inherited project begins with a short audit so you get a written, honest view of what you actually have, and if we think you would be better served by finishing with your current team, we will say so rather than take the work. Where a codebase is sound we build on it; where it is not, we will show you exactly why before proposing a rebuild on .NET 10 and Umbraco 17, our standard platform for new work. According to Umbraco's long-term support policy, Umbraco 13 loses security support on 14 December 2026, so builds we ship today start their life on a supported long-term platform instead of one already facing an end-of-support deadline.
A rapid development engagement is a fixed-price build with the scope, the cost, and the definition of done agreed before we write a line of code. There are no day rates and no open-ended sprints: you sign a number, we ship the thing, and typically we start within two weeks of the signed proposal. Builds run on .NET 10 and Umbraco 17 with AI-assisted development throughout, Claude Code being our default toolchain, which is how a product like Sumlo shipped in three days and Patch in three weeks. You get working software early and often rather than a big reveal at the end, and when the project closes you own the full source code outright. There is no vendor lock-in and nothing held hostage; you can hand the repository to an in-house team or another agency the day after launch if you choose.
A retainer is one to five reserved days each month, and most clients settle on two. After a rapid build ships, a retainer is how it keeps improving: new features, refinements from real user feedback, and the routine upkeep that keeps the platform current. According to Umbraco's release calendar, a new major version ships every six months, so part of that time goes on staying upgraded rather than saving it all up for one painful jump later. Priorities are agreed with you at the start of each month, the days are yours to direct, and if a month genuinely needs nothing we will tell you instead of inventing work to fill it.
Simplepage is based in Douglas, Isle of Man. Rapid development projects run remote-first wherever you are, with on-site time available for the Isle of Man and North Wales.