Generic AI Assistants That Do Not Know Your Business
General assistants do not know your products, rules or systems. A custom agent is built with all three.
AI AGENT DEVELOPMENT · UK
Custom AI Agents in the UK – One Agent, One Job, Done Properly
The best AI agents do one job very well. We build custom agents for specific tasks in your business, give them only the tools they need and test them on your real work before they go live. We work with teams in Milton Keynes, Stony Stratford, Birmingham and across the UK.
- UK GDPR compliant
- Works with your tools
- You own the code
REAL CLIENT RESULTS
Trusted by UK Businesses Using Our Custom AI Agents
Numbers from projects we have delivered for UK businesses, from recruitment and accountancy to solar energy and field service software.
58%Less screening timeRecruitment
97%Faster lead responseSolar energy
72%Less time chasing recordsAccountancy
8 wksFrom notes to launchField service software
Areas we cover
Based in Milton Keynes, building AI for businesses nearby in Bletchley, Wolverton, Newport Pagnell, Stony Stratford, Buckingham, Bedford, Northampton and Olney, and across the UK in London, Birmingham, Manchester, Leeds, Liverpool and Lichfield.
IN PLAIN ENGLISH
What Are Custom AI Agents – and What We Do Differently
A custom AI agent is built for one defined task, such as triaging enquiries or preparing quotes, using your systems and your rules. We start narrow on purpose. An agent that handles one job reliably earns your team’s trust, and it is far easier to extend a dependable agent than to fix an ambitious one that tries to do everything.
SOUND FAMILIAR?
Business Problems Our Custom AI Agents Solve
Tasks Too Varied for Normal Automation
Every request is slightly different, so fixed rules cannot handle it. An agent can read and decide, within limits.
Ambitious AI Projects That Never Finish
Projects that try to automate everything at once often stall. A focused agent delivers value in weeks.
No Visibility of What AI Is Doing
If you cannot see an agent’s steps, you cannot trust it. Ours log every action in plain language.
WHAT WE BUILD
Our Custom AI Agents Services
Task Analysis & Agent Design
The job broken into steps, tools, decisions and approvals before we build.
Tool & API Connections
Secure access to the specific systems the agent needs, and nothing more.
Quote & Proposal Agents
Agents that gather details, price the job and draft a quote for approval.
Enquiry Triage Agents
Agents that read enquiries, check details and route each one to the right person.
Data Entry & Update Agents
Agents that keep records up to date from emails, forms and calls.
Approval & Escalation Rules
Clear rules for when the agent acts alone and when it asks a person.
Shadow Mode Testing
The agent runs alongside your team on real work before it acts on its own.
Ongoing Tuning
Mistakes reviewed and rules improved each month based on real results.
Find Out What AI Can Automate in Your Business
A free audit shows the tasks worth automating first, with the hours each one should save.
WHO USES IT
Custom AI Agent Use Cases by Department
Custom AI Agent for Sales Teams
An agent that researches new leads, updates the CRM, drafts personal follow-ups and books meetings for your reps.
Custom AI Agent for Marketing Teams
Agents that pull campaign data, write the weekly report and flag what changed, ready for a marketer to review.
Custom AI Agent for Customer Support
Support agents that look up orders, issue simple refunds within your rules and pass anything unusual to a person.
Custom AI Agent for Operations & Admin
Agents that move data between systems, chase missing information and keep jobs moving without someone watching.
Custom AI Agent for Finance & Reporting
Agents that match invoices to purchase orders, chase late payments politely and prepare reconciliations for sign-off.
Custom AI Agent for HR & Recruitment
Agents that screen applications, schedule interviews and send onboarding documents once an offer is accepted.
CASE STUDIES
Custom AI Agents Results: Client Case Studies
Real projects, real numbers. Client names are kept private where they asked us to.
Solar Energy: 97% Faster Lead Response Through Automation
97%Faster lead response
31%More surveys booked
A UK solar installer connected its ads, website and CRM, so every enquiry gets a reply in minutes and customers book their own surveys.
Read the case studyRecruitment: 58% Less CV Screening Time with an AI Platform
58%Less screening time
92%CVs imported automatically
A specialist UK recruitment agency now has CVs pulled in, ranked and explained by AI, so recruiters spend their day on calls instead of reading.
Read the case studyAccountancy: 72% Less Time Chasing Client Records
72%Less time chasing records
29%Faster year-end turnaround
A UK accountancy practice replaced email chasing with a portal that sends its own reminders and collects documents in one place.
Read the case studyGet Similar Results for Your Business
Tell us which job takes your team the most time. We will show you what can be automated.
HOW WE WORK
How Our Custom AI Agents Process Works
AI Opportunity Audit
We map the task step by step with the people who do it now, including the exceptions and the decisions made along the way.
Roadmap & ROI Forecast
You get a plan showing what the agent will do on its own, where it asks for approval, the tools it needs and the expected savings.
Build & Integrate
We build the agent, give it secure access to the tools it needs and set clear limits on what it is allowed to change.
Test, Train Your Team & Launch
We run it alongside your team on real work, compare results, train staff to supervise it and then hand over more of the task.
Monitor, Optimise & Scale
We log every action, review mistakes, tighten the rules and extend the agent to the next part of the process.
TECHNOLOGY
AI Models & Platforms We Work With
We are not tied to one vendor. We choose on accuracy, cost and where your data needs to live.
AI Models (OpenAI GPT, Claude, Gemini, Llama)
Models with strong tool use and reasoning, chosen per step so simple jobs use cheaper models.
Agent Frameworks & Automation Platforms
LangGraph, OpenAI Agents SDK, CrewAI, n8n, Make and Zapier, depending on how complex the task is.
CRMs & Business Tools
HubSpot, Salesforce, Zoho, Microsoft 365, Google Workspace, Xero, help desks and your own databases.
WHY CODECRACKERS
Why UK Businesses Choose Us for Custom AI Agents
Custom-Built AI, Not Expensive Off-the-Shelf Subscriptions
Your custom AI agents is built for your processes and you own it. No per-seat licence that grows every time you hire.
Works Inside Your Existing Tools
We connect to the CRM, inbox, help desk and files your team already uses, so nobody has to learn a new system to get the benefit.
UK GDPR-Compliant AI Systems
Data stays in UK or EU hosting where needed, access is limited to what each part needs, and we document how personal data is handled.
ROI-First Approach with Measurable Results
Before we build, we agree what success looks like in hours saved, response time or revenue, and we report against it every month.
PRICING
Custom AI Agents Packages & Pricing
Clear starting prices. Every project gets a fixed quote after the free audit, before any work begins.
Free Custom AI Agents Audit
A 45-minute call and a short written report: where custom AI agents would help, what it would cost and the likely payback.
Book my free auditMost popular
90-Day Custom AI Agent Build Package – From £6,000
Audit, roadmap, build, testing, training and launch of your first solution, with a fixed price agreed before we start.
Get a quoteMonthly Custom AI Agents Retainer – From £600/month
Monitoring, improvements, new features and support every month, with a report on usage, accuracy and time saved.
Get a quoteBook Your Free Audit
45 minutes, no obligation. You keep the report either way.
INDUSTRIES
Industries We Build Custom AI Agent For
Sectors where we already have live client work.
- RecruitmentCV screening, candidate ranking and shortlists.
- Solar and renewable energyLead capture, instant replies and survey booking.
- Accountancy and financeDocument collection, reminders and client portals.
- Trades and field serviceScheduling, quotes, invoices and job admin.
- Ecommerce and retailProduct data, customer queries and order updates.
- Health and wellnessBooking questions, product advice and follow-ups.
CLIENT REVIEWS
What Our Clients Say About Our Custom AI Agents
“Our recruiters used to spend most of the day downloading and reading CVs. Now the platform pulls them in, ranks them and explains why, and we just make the calls.”
“We were losing good leads simply because we couldn’t reply fast enough. CodeCrackers connected our ads, website and CRM so every enquiry gets an answer in minutes.”
“Clients upload everything in one place, reminders go out on their own, and we can finally see every deadline coming.”
“I knew exactly what tradespeople needed but had no idea how to build it. CodeCrackers turned my notes into Vantro, and we launched in eight weeks.”
FAQs
Custom AI Agents FAQs
FREE AUDIT
Ready to Put AI to Work? Book Your Free Custom AI Agents Audit
Tell us about your business and the work that eats your team’s time. We will reply within one working day with a time for your free audit.
- A list of tasks worth automating
- Expected hours saved and payback
- A fixed quote, no obligation
Book your free audit
Four quick details. No obligation.