Service
AI Development Company in the UK: Custom AI Built to Work
HAeX is an AI development company that builds custom AI tools, agents and apps for UK businesses. We start with the problem, prove it works on a small version, then build the full thing. If buying software is the better route, we say so. Price is scoped on a call after the audit.
- We build a small working version first.
- We tell you when to buy instead of build.
- Every build has a UK GDPR and data flow note.
Only if ready made software cannot do the job. Most firms should try software first. We help you check before you spend.
Is custom AI right for my business?
Custom AI makes sense when your process is unusual, your data is your edge or no product fits. It also makes sense when you want to own the tool. It does not make sense for a task a standard product already does well.
Should we build custom AI or buy something ready made?
Buy when a product fits, and build when it does not. The table shows how we decide.
| Question | If yes | If no |
|---|---|---|
| Does a product do 80 percent of it? | Buy | Consider building |
| Is the process unique to you? | Consider building | Buy |
| Must it use your private data? | Often build or integrate | Buy |
| Do you want to own the result? | Build | Buy |
Our guide on build versus buy goes deeper. If you need to link a product to your data, see AI integration.
If you are unsure, AI strategy consulting gives a build, buy or wait view for each idea.
What do you build?
We build tools that read, write, decide and report, inside your own systems. Each one starts as a small working version.
Examples include:
Internal tools that search your documents and answer staff questions
AI agents that carry out tasks
Apps that give customers a guided result
Forecasting and prediction tools, when you have the data
Software with AI built in, see AI software development
Text and image tools, see generative AI development
Here is a worked example with assumed figures. It is not a client result.
What does a worked example look like?
Say staff spend 3 hours a week hunting through old reports to answer client questions. Ten staff gives 30 hours a week. A search tool over your own documents gives a sourced answer in seconds. People still check the source before they reply.
We can work through this with your own details on a free call.
Which tools and models do you use?
We use OpenAI and Claude for language tasks, and normal code for everything else. We pick the model by task, cost and where data may go.
We avoid locking you in. The design lets us swap a model if prices or terms change. We tell you which model sees which data. For plain automation, see AI Automation.
How does a project run, step by step?
It runs in four steps.
- 1
Discovery call (30 minutes)
You describe the problem and the data.
- 2
Audit and quote
We test the idea on a sample and quote in writing.
- 3
Build
We build in stages and show you a working version at each one.
- 4
Run and improve
We hand over, monitor and improve it.
Who owns what we build?
The ownership terms are set out in your contract before work starts.
You should know this before you sign. If a supplier is vague on ownership, ask again. We cover it on the call.
The demo works, then real data breaks it. That is the common failure. We test with your real data early and often.
What could go wrong?
Other risks are a scope that grows and a model that changes. We build in stages, agree the scope in writing and log AI actions. Where a person must decide, they do. If a project has stalled elsewhere, we can review the code and tell you whether to fix or restart.
Is it safe under UK GDPR?
It can be. Every build has a UK GDPR and data flow note, a DPIA where needed, and named sign off points.
We state which model provider processes your data and where. We also advise on the Data (Use and Access) Act 2025 for automated decisions. For a policy and risk review, see AI governance and compliance.
What does an AI development company cost, and what is next?
Price depends on scope, data and risk. We scope it on a free call, test the idea in an audit and quote in writing.
We do not sell predictive analytics as a separate service. We build forecasting inside a custom project when you have the data. If you are unsure where to start, our AI Consultancy service helps you decide.
Our predictive analytics buyer's guide lists what to ask any supplier before you sign.
Questions that come up
How much does custom AI development cost?
It depends on scope, data and risk. We scope it on a call and quote in writing after the audit.
Can we hire AI developers from you?
We build projects for you, and we can supply AI specialists. See our AI recruitment page.
How long does a project take?
We agree the timeline in writing, after a small working version. The full build depends on scope.
Can you rescue a project that stalled?
Sometimes. We review the code and data first, then tell you whether to fix it or restart.
Which language models do you use?
OpenAI and Claude, chosen by task. We name the model for each part.
Do you build forecasting tools?
Yes, inside a custom project, when you have enough clean data.
What happens on the call
- 1
You describe the problem you want AI to solve
- 2
We say whether to build, buy or automate
- 3
You leave with a short list of what to automate first and a rough idea of cost
Prefer to talk first? Ring 07435 708864.
What you now know
- Whether custom AI fits you
- When to build and when to buy
- What we build
- What a week looks like with and without it
- Which tools we use
- How a project runs
- Who owns what we build
- What can go wrong
- How we handle UK GDPR
- What it costs and your next step
Tell us what you need built
The first call is free. We say whether custom AI fits, or whether a ready made tool will do.