Nobody Knows How Accurate the System Is
People say it is “mostly right”. Without a test set, you cannot tell if a change helped or hurt.
RAG DEVELOPMENT · UK
RAG Evaluation and Optimisation in the UK
If your RAG system sometimes gives wrong or vague answers, you need to know how often and why. We measure accuracy on real questions, find where it fails and fix it. We work with teams in Milton Keynes, Olney, Lichfield and across the UK, including on systems other people built.
- UK GDPR compliant
- Works with your tools
- You own the code
REAL CLIENT RESULTS
Trusted by UK Businesses Using Our RAG Evaluation and Optimisation
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 Is RAG Evaluation and Optimisation – and What We Do Differently
RAG evaluation means testing a system against a set of questions with known answers and scoring how well it retrieves and answers. Optimisation is fixing what the tests reveal. Most teams judge their RAG by trying a few questions. We give you a repeatable score, so every change can be shown to make things better, not just different.
SOUND FAMILIAR?
Business Problems Our RAG Evaluation and Optimisation Solves
Users Losing Trust After a Few Bad Answers
Two wrong answers and staff stop using it. Finding and fixing the common failure types wins them back.
Retrieval Missing the Right Documents
The answer is in the index but the system does not find it. Retrieval tuning is usually the biggest single fix.
Costs Rising with No Gain in Quality
Bigger models and longer context cost more but do not always help. Testing shows where you can spend less.
WHAT WE BUILD
Our RAG Evaluation and Optimisation Services
Test Set Creation
A set of real questions and approved answers, built with your subject experts.
Retrieval Scoring
Measures of whether the right passages are found, and how high they rank.
Answer Accuracy & Faithfulness Scoring
Checks that answers are correct and backed by the sources shown.
Failure Analysis
Wrong answers grouped by cause: missing content, bad retrieval, weak prompts or model limits.
Retrieval & Chunking Fixes
Changes to chunking, hybrid search, reranking and filters, each tested against the score.
Prompt & Model Tuning
Prompts and model choice adjusted for accuracy and cost, with results compared side by side.
Cost & Latency Reduction
Smaller context, caching and cheaper models where tests show no loss in quality.
Ongoing Evaluation in Production
Automatic scoring on a sample of live questions, with alerts when quality drops.
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
RAG Evaluation Use Cases by Department
RAG Evaluation for Sales Teams
Sales staff ask for prices, specs or contract terms and get an answer with the source document linked, in seconds.
RAG Evaluation for Marketing Teams
Marketers check brand guidelines, past campaigns and product facts before they write, so copy stays accurate.
RAG Evaluation for Customer Support
Agents and customers get answers drawn from your real help centre and policies, with links back to each source.
RAG Evaluation for Operations & Admin
Staff find the right procedure, form or safety note without scrolling through shared drives or asking a colleague.
RAG Evaluation for Finance & Reporting
Finance teams search contracts, invoices and policy documents in plain English instead of opening folder after folder.
RAG Evaluation for HR & Recruitment
New starters ask the handbook questions directly and get the current policy, not the version from three years ago.
CASE STUDIES
RAG Evaluation and Optimisation Results: Client Case Studies
Real projects, real numbers. Client names are kept private where they asked us to.
Recruitment: 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 studySolar 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 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 RAG Evaluation and Optimisation Process Works
AI Opportunity Audit
We review the documents you want the AI to use: where they live, how often they change and who is allowed to see what.
Roadmap & ROI Forecast
We agree the questions the system must answer well, the accuracy target and the hosting set-up, with a clear cost.
Build & Integrate
We prepare and index your content, build the retrieval pipeline and connect it to the chat or search screen your team will use.
Test, Train Your Team & Launch
We test against a set of real questions with known answers, fix weak spots, then train your team and go live.
Monitor, Optimise & Scale
We watch which questions fail, add missing content, re-index new documents and keep answer quality measured over time.
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)
Chosen for answer quality and cost, with private hosting options when documents must stay in the UK or EU.
RAG Frameworks & Vector Databases
LangChain, LlamaIndex, Pinecone, Weaviate, Qdrant, pgvector and Azure AI Search, chosen to suit your data size.
Document Sources & Business Tools
SharePoint, Google Drive, Confluence, Notion, Zendesk, websites, PDFs and databases, kept in sync automatically.
WHY CODECRACKERS
Why UK Businesses Choose Us for RAG Evaluation and Optimisation
Custom-Built AI, Not Expensive Off-the-Shelf Subscriptions
Your RAG evaluation and optimisation 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
RAG Evaluation and Optimisation Packages & Pricing
Clear starting prices. Every project gets a fixed quote after the free audit, before any work begins.
Free RAG Evaluation and Optimisation Audit
A 45-minute call and a short written report: where RAG evaluation and optimisation would help, what it would cost and the likely payback.
Book my free auditMost popular
90-Day RAG Evaluation Build Package – From £4,000
Audit, roadmap, build, testing, training and launch of your first solution, with a fixed price agreed before we start.
Get a quoteMonthly RAG Evaluation and Optimisation Retainer – From £500/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 RAG Evaluation 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 RAG Evaluation and Optimisation
“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
RAG Evaluation and Optimisation FAQs
FREE AUDIT
Ready to Put AI to Work? Book Your Free RAG Evaluation and Optimisation 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.