AI agent development company
Agents that take real steps in your business, such as looking something up, drafting a reply or updating a record, with clear limits and a person approving what matters.
AI agent development for UK businesses
We are an AI agent development company that builds agents for specific, repeatable jobs. An agent is AI that can take actions as well as answer: it reads an enquiry, checks your CRM, searches your documents, drafts a response and proposes the next step. Each one has a narrow brief, a defined set of tools and a clear record of everything it does.
The difference between a useful agent and a risky one is design. We decide with you which actions the agent may take on its own and which need a person to approve. Most agents we build draft and recommend, then hand over. Anything customer-facing, financial or irreversible waits for a human. That keeps the time savings without handing judgement to software.

What we build
- Lead qualificationResearches each enquiry and scores it.
- Quote draftingTurns a brief into a first-draft quote.
- Knowledge searchRetrieval over your documents (RAG).
- Back-office tasksInvoices, updates and chasers.
AI agents for business: where they earn their keep
Good agent work is dull in the best way. It takes the steps your team repeats every day and does them the same way every time, so people can spend their attention on the cases that need it. We start by watching how the task is done today, then write down each step before deciding which ones an agent should take.
- Lead qualification: researches each enquiry, scores it against your criteria and drafts a reply.
- Quote drafting: turns a brief or site notes into a first-draft quote for review.
- Back-office tasks: chases invoices, updates records and prepares weekly summaries.
- Inbox triage: sorts incoming email, extracts the details and routes it to the right person.
- Research: gathers company, planning or product information from approved sources into a short brief.
RAG development services for accurate answers
Retrieval-augmented generation lets an agent search your own documents before it answers. We prepare your policies, manuals, past proposals and product data, split them sensibly, and index them so the agent finds the right passage and cites it. Access follows your existing permissions, so an agent never shows someone a document they could not open themselves. We test retrieval quality separately from the model, because most wrong answers start with the wrong source. Where a question has no good answer in your documents, the agent says so and flags the gap, which tells you what content is missing. When documents change, the index updates, so answers do not drift out of date.
Custom AI agent development with safe limits
Every agent gets explicit tools, spending caps and timeouts. Actions are logged with inputs and outputs, so you can audit any decision and see exactly where a person stepped in. If something unexpected happens, the agent stops and asks rather than guessing. We handle personal data under UK GDPR, choose models that suit your data rules, and avoid locking you into one provider. If you want wider automation around the agent, it can trigger and be triggered by your existing workflows, so it fits the way your business already runs. Agents and workflow automation work best together, which is why clients also use us as an AI automation agency for UK teams.
What’s included
- A task map showing which steps the agent takes and which a person approves
- Tool connections to your CRM, inbox, calendar or database
- A document index for retrieval, respecting existing permissions
- Action logs with inputs, outputs and approvals
- Spending caps, timeouts and failure alerts
- A test set of real cases, run before launch
- Handover documentation and a walkthrough for your team
Not sure what you need yet? Get a free audit and a clear plan, with no obligation.
Get my free auditHow it works
- AuditWhat you have today, what competitors do, and what’s costing you enquiries.
- PlanPages, features, searches to target, integrations and a fixed written quote.
- DesignDesigned in the browser, so you review the real thing, not a picture of it.
- BuildFast, accessible, secure code, connected to the tools you already use.
- GrowLaunch, tracking and monthly improvements from real data.
Questions
What is an AI agent?
Software that uses an AI model to plan and take steps, such as searching documents, reading a record or drafting an email, rather than only answering a question. Each agent we build has a narrow job and a limited set of tools.
What is RAG?
Retrieval-augmented generation: the agent searches your own documents first and answers from what it finds, which keeps answers specific and checkable against a source you recognise.
Can an AI agent act without approval?
Only where you decide it should. Most agents we build draft and recommend, and a person approves anything customer-facing or financial. Low-risk steps, such as tagging a record, can run on their own.
How much does it cost to build an AI agent in the UK?
It depends on scope: the number of tools the agent uses, the systems it connects to and how much testing the task needs. We do not publish prices. Request the free audit for a written quote.
Which AI models do you use for agents?
Whichever suits the task and your data rules, from leading commercial models to private deployments. We design agents so the model can be swapped later without rebuilding everything around it.
What is the difference between an AI agent and automation?
Automation follows fixed rules. An agent handles steps that need reading and judgement, like understanding a messy enquiry. The two work well together: rules for the predictable parts, an agent for the rest.
Related services
By industry
Find out what to fix, build or automate first
Tell us about your website, the app you have in mind or the work you want off your plate. We’ll review it and send you a clear, practical audit made for your business. Free, no obligation, and yours to keep.
- What’s costing you enquiries on your current site
- Where a custom web app or AI could save your team hours
- The fixes and features that would pay back first
- A clear written quote, only if you want one
Rather email? hello@thirdtab.co.uk
