AI & Automation
Custom AI agent development for UK businesses
Agents that do real work in your systems, with your rules and a person in the loop. A fixed quote after a free call, from £999.
In short
A custom AI agent is software that uses a language model to plan and complete tasks across your own systems, such as reading documents, updating records and drafting replies. APPS 365 is a UK company that designs, builds and supports these agents, from £999, with a fixed written quote before work starts.
Where a custom agent earns its keep
Most businesses do not need more AI tools. They need the repetitive part of a job taken off someone's desk, safely.
People copy data between systems all day.
An agent reads, checks and updates records through proper connections, and hands anything unusual to a person.
Enquiries wait until someone is free.
An agent answers from your own documents, qualifies the enquiry and books the next step.
Generic chatbots do not know your business.
A custom agent works from your data, your wording and your rules, not the open internet.
Nobody knows what an AI tool did or why.
Every action can be logged, reviewed and limited, so you stay in control of what it may do.
What you get from a custom build
Built around how you work
We map the job first, then build the agent to fit your process, rather than changing your process to fit a tool.
Connected to your data
Agents can use your documents, databases and business apps, with access limited to what the job needs.
Human approval where it matters
You decide which actions run on their own and which wait for a person to approve them.
Model-agnostic
We can build on Claude, ChatGPT, Gemini or Copilot, and choose what suits the task, the cost and your data rules.
A clear audit trail
Logs show what the agent read, decided and changed, so problems can be found and fixed.
Support after launch
Models and systems change. We can keep your agent working and improve it as you learn what it should do next.
What is included
Exactly what you get is set out in your written quote. A typical build covers:
- Discovery call and a written description of the job the agent will do
- Agent design: its goal, tools, data sources, limits and approval steps
- Connections to your systems and documents
- Build, testing against real examples, and guardrails
- Logging so you can see what the agent did
- Handover, guidance for your team and agreed support
Agent, chatbot or automation: which do you need?
These words get mixed up. The right answer is often the simplest one that does the job, and we will tell you if that is not an agent.
| What it does | Good for | |
|---|---|---|
| Automation | Follows fixed steps you define | Repeatable work with clear rules |
| Chatbot | Answers questions in a conversation | Website enquiries and common questions |
| AI agent | Plans steps and uses tools to reach a goal | Multi-step work with judgement and exceptions |
Build, buy or use Copilot Studio?
Buy an off-the-shelf tool when your need is common and the tool already does it. Use Microsoft Copilot Studio when the agent lives inside Microsoft 365 and your data is already there. Build a custom agent when the work crosses several systems, needs your own rules, or needs to be something you can change freely.
We build all of these, so we have no reason to push you towards one. See Copilot Agent Development if Microsoft 365 is where your work happens.
How a build works
- 1
Free call
We talk through the job, your systems and what good looks like. No obligation.
- 2
Written quote
You get a fixed price, the scope and the timetable in writing before any work starts.
- 3
Design
We agree the agent's tools, data access, limits and where a person approves its work.
- 4
Build and test
We build it and test it against real examples from your business, in a safe environment first.
- 5
Launch and support
We go live with logging in place, then tune it from what it actually does.
We ship our own AI products
We do not have client case studies to show here yet, so judge us by what we have shipped ourselves.
Pricing guide
Custom AI builds start from £999. You get a fixed quote after a free call, and running costs are monthly because models and hosting charge by use. Your quote sets out both, so there are no surprises.
- Custom builds from £999
- Fixed written quote before work starts
- Monthly running costs, shown in your quote
Why APPS 365
UK-based
APPS 365 LTD is registered in England and Wales, with a registered office in London.
Microsoft ecosystem specialists
We publish SharePoint and Microsoft 365 apps on Microsoft Marketplace, so we build on this platform every day.
We ship our own products
Apps, games and SaaS platforms of our own, live for anyone to try. ComponentSource Top 100 Publisher 2022, 2023 and 2025.
A fixed quote first
A free call, then a written quote before any work starts, so you know the cost and scope.
More detail, examples and our guides are on apps365.ai, our AI building arm.
Custom AI Agents on apps365.aiFrequently asked questions
How much does a custom AI agent cost in the UK?
Our custom builds start from £999, with a fixed quote after a free call. The price depends on how many systems the agent connects to and how much it has to decide for itself. Running costs are monthly and are shown in your quote.
What is the difference between an AI agent and a chatbot?
A chatbot answers in a conversation. An agent works towards a goal: it can plan steps, use tools, read and update your systems, and ask a person when it is unsure. A chatbot can be part of an agent, but most agents do more than talk.
How long does it take to build an AI agent?
It depends on the job and the systems involved, so we set the timetable in your written quote after the free call. Starting with one clear job is usually the quickest route to something useful.
Is it safe to connect an AI agent to company data under UK GDPR?
It can be, if it is designed for it. We limit what the agent can see, log what it does and keep people approving the riskier actions. Where data is processed, and by whom, is agreed in writing, and you remain responsible for your data as controller.
Should I build an AI agent or buy an off-the-shelf one?
Buy when a tool already does the job well. Build when the work spans several systems or depends on your own rules. On the free call we will tell you honestly if a ready-made tool would serve you better.
Which AI models do you use?
We are model-agnostic and can build on Claude, ChatGPT, Gemini or Copilot. We choose based on the task, the cost and your data rules, and the design lets you change model later.
Who owns the agent and its code?
Ownership is agreed in writing in your quote before work starts, so you know where you stand from the beginning. Ask us on the call if you have a specific requirement.
Tell us the job you want off your desk
A free 30-minute call, then a fixed written quote. No obligation.
