Custom Software Development UK
BuildApps is a custom software development company based in London, working with businesses across the UK. We design and build bespoke platforms, mobile apps and AI-native products, tailored to how your business actually works rather than bent to fit off-the-shelf software.
We reply to every enquiry within one working day.
Bespoke platforms, industry builds and AI-native products, made for how your business actually works.
Internal tools, customer platforms, dashboards and workflow systems, shaped around your processes and data. One product in place of spreadsheets, legacy systems and scattered SaaS.
Custom software for healthcare, financial services and other regulated industries, where compliance, data security and reliability come first.
LLM integration, RAG pipelines, automation and AI agents, designed in from the architecture stage.
A London team working with clients across the UK, on UK hours, with direct access to the people building your product.
Claude Code, Codex and GitHub Copilot in our everyday workflow, with the same review and QA on everything we ship.
Buy off-the-shelf software when your process is ordinary. Payroll, accounting and email are solved problems, and a subscription will always be cheaper than a build. Commission custom software when the process is what makes your business different, when you are stitching together four tools and a spreadsheet to do one job, or when you are paying per seat for features you never use.
The honest test: if you would have to change how you work to fit the product, the product is wrong. If a tool covers 90% of what you need, buy it and integrate it. Custom software earns its cost where the last 10% is the part that makes the money. For a longer view, read custom software vs off-the-shelf software for UK businesses.
Price follows scope. Every build starts with a discovery workshop, so the budget is tied to what actually matters.
A monthly support plan, scoped to how much continuous improvement you want. Running costs alongside it include user feedback and iteration, AI model tokens and third-party services.
AI-assisted tooling speeds up the build; the thinking, review and testing still take the time they take. More detail in how much custom software development costs in the UK.
Five steps from first conversation to a product that keeps improving.
Step 01
We work out what you are really trying to achieve, who will use the software, what it must connect to and what could go wrong. You get a scoped plan, a price and a recommended first release. Often this is where we tell you to build less.
Step 02
Clickable designs and, where it helps, a working prototype, so you see the product before the main build begins. Changes here cost hours, not weeks.
Step 03
Short cycles with a working demo every one or two weeks. You talk directly to the people writing the code. Every change is reviewed and tested, whether a person or an AI tool wrote the first draft.
Step 04
Data migration, security checks, app store submission where relevant, and a monitored release. For regulated work this includes the documentation your auditors will ask for.
Step 05
Hosting, fixes, updates for new operating system releases and a steady roadmap of improvements. You own the code and the infrastructure accounts throughout.
Case studies
We designed and built the iOS, Android and dashboard platform clinicians use to prescribe and manage leg braces.
Read case study ›
We built a hands-free cooking app with voice guidance, timers and shopping lists.
Read case study ›
Compliance, auditability and duty of care for education and health institutions.
Read case study ›Questions
Price follows scope. Every project begins with a discovery phase and workshop, so you have a clear figure before committing. We agree a fixed range with you before any build begins.
It depends on scope. A proof-of-value build is measured in weeks; a full platform takes months. The discovery workshop sets a realistic timeline, and we recommend launching a smaller first version and extending it, because real usage teaches you more than a long specification.
Only when your process is a competitive advantage or no existing product fits. For standard needs such as accounting or email, off-the-shelf is cheaper and safer. Many good solutions combine bought tools with a custom layer on top.
No. We are based in London and work with clients across the UK, US and EU, remote by default and in person when it matters.
Yes. We have delivered platforms for healthcare, education and financial services, where data protection, audit trails and compliance shape the design from day one. See our healthcare software development page.
Yes. You own the source code, the designs and the hosting accounts, so you are never locked in to us.
We use tools such as Claude Code, Codex and GitHub Copilot in everyday delivery, with the same review and testing standards as any other code. It speeds up the build, which helps timelines and budgets, but it does not replace design, architecture or QA. Read more on AI-assisted development.
We offer a monthly support plan, scoped to how much continuous improvement you want. Costs such as user feedback, AI tokens and third-party services form part of the ongoing running costs.
Choosing a supplier? Read how to choose a custom software development company.
Start a project
Tell us what you are trying to build. We reply within one working day with an honest view of the right approach, including when the answer is to buy rather than build.
