AI development company · UK

AI Development Company in the UK

Choosing an AI partner comes down to what happens after the demo. We help UK businesses start with a measured pilot on one workflow and their own data, agree how accuracy will be judged before anything is built, and settle data protection and running costs before anything is scaled.

  • A pilot on one workflow before any platform
  • Accuracy judged on your own examples
  • Model-agnostic: GPT, Claude, Gemini or open models

Our approach

Pilots before platforms.

The model is the one part of an AI project you can simply rent. GPT, Claude and Gemini are an API key away, and capable open models such as Llama and Mistral are openly available. What you are really buying from an AI development company is everything around the model: choosing a job worth giving it, proving it does that job well enough, connecting it safely to your systems, and keeping it working once people depend on it.

That holds whether the end result is an agent that works across several systems, an automation that reads and routes documents, a RAG assistant that answers from your own knowledge, a customer-facing chatbot or an LLM feature inside your product. So we start small and specific: one workflow, measured as it runs now; an evaluation set built from your real examples, with a pass mark agreed up front; and a pilot on your own data, with a person reviewing the output.

At the end of the pilot you get a straight recommendation — scale it, change it or stop — backed by results from your own work rather than a vendor demo. A shared “AI platform” can come later, once several pilots have shown they need common plumbing. Built first, it is where budgets disappear before anything useful reaches a user.

  • One workflow, with a measured baseline
  • Evaluation criteria agreed before the build
  • A pilot on your data, with a person in the loop
  • A written scale, change or stop recommendation

Before we quote

What a good AI partner should ask you first.

A supplier who quotes an AI project without asking these is pricing a demo. We work through them with you in the first conversation, before any estimate.

The task

Which job, exactly?

Not “use AI in customer service” but “draft replies to delivery queries”. A named task with a weekly volume is something we can measure, price and test.

The stakes

What does a wrong answer cost?

A clumsy product description and a wrong refund decision need very different safeguards. The answer sets how much human review the design needs.

The data

What data is involved, and where may it go?

Personal data, client-confidential material or commercially sensitive figures all change which models, providers and processing regions are acceptable.

The baseline

How is the work done now?

Time per item, backlog, error and rework rates. Without a clear “before”, nobody can say whether the “after” is better — or worth the running cost.

The people

Who checks the output?

Someone has to review, correct and escalate. We design the review screen around that person, and their corrections become new test cases.

After launch

Who owns it once it is live?

Content changes, prompts drift and models are retired. Someone must own quality, cost and changes — your team, ours or both, agreed in advance.

Models and vendors

How we choose the model.

We are not tied to any AI provider. Each use case gets a shortlist tested on the same evaluation set, and the choice is written down with its reasons — so you can revisit it when the market moves.

Accuracy on your examples

Public benchmarks say little about your invoices or your customers’ questions. Candidates are scored side by side on your own evaluation set.

Cost per task, not per token

Token prices are hard to compare. We work out what one completed task costs with each model, including retries, retrieval and review time.

Speed users will accept

A chat reply needs to start appearing quickly; an overnight batch job can wait. The latency target narrows the shortlist fast.

Where the data is processed

Provider data terms, retention settings and processing regions are checked for your use case, including whether UK or EU processing is available.

Retrieval before fine-tuning

Most “it does not know our business” problems are solved by giving the model the right documents at the right moment, not by retraining it.

How RAG knowledge search works

A model you can swap

The model sits behind one interface in your code, so moving to a cheaper or better one is a tested change rather than a rebuild.

LLM integration in more depth

UK GDPR and the ICO

Data protection, designed in from the pilot.

Most useful AI touches personal data somewhere — a customer email, a CV, a claim form. The ICO’s guidance on AI and data protection applies the same UK GDPR principles to AI as to any other processing, and for many AI projects that means a data protection impact assessment before go-live. We treat the DPIA as a design input, not paperwork at the end.

In practice we map exactly what data reaches the model, strip out what it does not need, check the provider’s current terms on retention and training for the plan you will use, and record where processing happens. Where an output has a real effect on a person — credit, employment, access to a service — we design a route for a human to review it and for the reasoning to be explained, in line with the ICO’s guidance on explaining decisions made with AI.

We are engineers, not lawyers. Your DPO or legal adviser decides the lawful basis and signs off the DPIA; we give them an accurate technical picture to work from, in writing.

  • A data-flow map and technical inputs for your DPIA
  • Redaction of personal data the model does not need
  • Provider terms and processing regions checked in writing
  • Human review and explanations for significant decisions
  • Audit logs of prompts, outputs and approvals

Running costs

What AI costs to run, not just to build.

A build quote is only half the budget. Model usage grows with volume, so we measure the real cost per task during the pilot and give you a monthly range at your forecast volumes before you decide to scale.

Model API fees

Charged by the provider for text in and out, on an account in your name. Long prompts and large retrieved documents are where the cost usually hides.

Search and storage

Embeddings, a search index and document storage for retrieval — usually a smaller line than model fees, but worth sizing before your content library grows.

Hosting and monitoring

The application, background jobs, logs and dashboards. Self-hosting an open model adds GPU capacity, which changes the sums considerably.

Review time

The minutes a person spends checking output. It should fall as accuracy improves, and it belongs in the business case either way.

How we keep it down

Caching repeated context, routing simple requests to smaller models, trimming prompts and batching work that is not urgent.

How you see it

Usage and cost dashboards per feature, with budget alerts, so a spike shows up within a day rather than on next month’s invoice.

Comparing AI partners

Warning signs when choosing an AI partner.

Whoever you choose — including us — these are worth checking before you sign anything.

Ask any AI partner for these in writing

Before you sign, a credible supplier should be able to give you:

  • The evaluation criteria that define “done”
  • A data-flow diagram showing what goes to which provider
  • An estimate of monthly running costs at your volumes
  • Confirmation that code, prompts, data and accounts are yours
  • What happens if you want to change supplier or model

A platform before a pilot

A long programme to build an “AI platform” before a single workflow has shown it works on your data. Ask what will be in real use first, and when.

No plan to measure accuracy

“It performed well in testing”, with no evaluation set, no pass mark and no way to tell whether next month’s change made things better or worse.

No questions about your data

Silence on personal data, provider terms and retention usually means those questions arrive later — from your DPO or your customers, at the worst moment.

Nothing you own at the end

Prompts, evaluation data and provider accounts held by the supplier make it hard to switch, to audit, or even to see what you are paying for.

How we work

Seven stages, each ending in your decision.

Our standard delivery process, with the AI decisions placed where they belong — before money is spent on the next stage, not after it.

  1. 01

    Discovery

    An NDA if you need one, then a working session on the questions above. We choose the workflow with you, measure how it runs now and collect the real examples that become the evaluation set.

    You decide whether it is worth a pilot

  2. 02

    Strategy

    Build, buy or leave alone. If something you already pay for can do the job, we say so. If not, we shortlist models, estimate running costs and fix the pilot’s scope and price.

    You approve scope, shortlist and price

  3. 03

    UX & architecture

    We design the review screen, confidence thresholds and escalation route, and draw the data flow your DPO will want to see — all before anything is built.

    Your DPO reviews the data-flow map

  4. 04

    Development

    Two-week sprints on your own data in a staging environment. Every prompt or model change is scored against the evaluation set before it is merged.

    You try the pilot at every sprint demo

  5. 05

    Testing

    Accuracy against the agreed pass mark, plus the awkward cases: ambiguous inputs, attempts to trick the model, and slow or failed provider responses.

    You see accuracy and cost per task

  6. 06

    Launch

    A limited rollout to one team, with a person reviewing output, logging switched on and costs visible from the first day.

    Your team uses it on real work

  7. 07

    Optimisation & support

    We compare results with the baseline and recommend scaling, changing or stopping. If it scales, we plan the next workflow and the monitoring that keeps it honest.

    You decide: scale, change or stop

Engagement models

How AI projects are priced.

Most AI work starts with a discovery sprint to choose the workflow and build the evaluation set, followed by a fixed-price pilot. Once a pilot has earned its place, dedicated engineers can carry the AI roadmap forward.

Fixed-scope project

Quoted after discovery

A defined build — an MVP, a rebuild or a feature set — with milestones and a fixed budget.

  • Agreed milestones and deliverables
  • Milestone-based billing
  • A demo at the end of every sprint

Dedicated developers

From £2,900 per developer / month

Ongoing roadmap work where you want named engineers inside your own sprints.

  • Named, senior engineers
  • Work inside your tools and sprints
  • Scale up or down as the roadmap changes

Prices are in GBP and show where engagements start, not a quote — every estimate is confirmed in writing after a discovery call. Model API fees are a separate running cost, paid to the provider on an account in your name.

Relevant work

Products we have designed and built.

Two projects where careful data handling mattered as much as the features: AI-assisted dental imaging built for clinician review, and client intake and document workflows for a law firm.

All case studies

Why Techsleight

What working with us is actually like.

No inflated numbers — just how we run projects, and what you can hold us to.

Product engineering, not ticket-taking

We ask what the software is for before we estimate it — and we will tell you when something should not be built, or should be bought instead.

AI where it earns its place

LLM features, retrieval and automation built with evaluation, guardrails and cost controls, and plain software where that is the better answer.

Full-stack under one roof

Design, frontend, backend, mobile, cloud and QA in one team, so nothing falls between suppliers.

UK-focused delivery

UK business hours, estimates in pounds, and a contract with a UK company. Our engineers are based in the UK and India.

Flexible engagement

A fixed-scope project, dedicated developers or a monthly retainer — and you can move between them as the work changes.

You own everything

Code, IP, cloud accounts and documentation are yours from day one. We sign an NDA before discovery if you need one.

Support after launch

We stay on for fixes, upgrades and new features, or hand over cleanly to your in-house team with the documentation to match.

FAQs

Questions to ask before you choose.

Straight answers on choosing, running and owning AI software. If your question is not here, ask us directly.

Ask us a question

How do we choose an AI development company in the UK?

Look at what they ask before they quote. A credible partner wants to know the task, the volume, what a wrong answer costs and what data is involved; proposes a pilot rather than a programme; explains how accuracy will be measured; puts running costs in writing; and confirms that code, prompts, data and accounts will be yours. Be wary of anyone who leads with a platform or a single favourite model.

Why start with a pilot instead of a full AI programme?

Because most of the risk in AI stays hidden until it meets your data. A pilot on one workflow tests accuracy, cost per task and how your team works with the output, for a small fraction of a programme budget. If it works, you scale with evidence; if not, you have spent a bounded amount to find out — and you keep the evaluation data and findings.

What does it cost to run an AI system once it is live?

Running costs are mainly model API fees, which grow with volume and prompt size, plus hosting, search infrastructure, monitoring and a share of support time. We measure the real cost per task during the pilot and give you a monthly range at your forecast volumes before you decide to scale. Model fees are paid to the provider, on an account in your name.

Do we need a DPIA before building an AI feature?

If the AI will process personal data, quite possibly. UK GDPR requires a data protection impact assessment where processing is likely to result in a high risk to individuals, and the ICO’s guidance on AI indicates that many AI uses meet that bar. Your DPO decides; we supply the data-flow map, provider terms and technical controls the assessment needs.

What if a better or cheaper model comes out after launch?

That is the normal state of the market, so we plan for it. The model sits behind one interface in your code, and your evaluation set lets us test a new model against the current one on your own examples. If it is better, or cheaper at the same quality, switching is a measured change rather than a rebuild.

Who owns the prompts, evaluation data and code?

You do. The code, prompts, evaluation sets, documentation and provider accounts belong to you from the start, and we will sign an NDA before discovery if you need one. That matters more with AI than with most software: without the prompts and evaluation data, nobody else can safely maintain or improve the system.

Our IT and security teams are cautious about AI. How do you work with them?

Early and in writing. We share the data-flow diagram, provider terms, processing region and access controls before the build, answer their security questionnaire, and design within their policies on identity, logging and retention. Where data must not leave your environment, we can use open models hosted in your own cloud account.

What happens if the pilot shows AI is not the right answer?

We tell you, and explain why. Sometimes simple rules or a better form beat a language model on cost and reliability; sometimes the data is not ready yet. A pilot that ends with a clear “not like this” still leaves you with a measured baseline, an evaluation set and a better-informed plan.

What kinds of AI systems do you build?

Agents that carry out multi-step work across your systems, automations that read and route documents, knowledge assistants built on retrieval (RAG), customer-facing chatbots, and LLM features inside existing products. Our AI development services page covers each in detail; this page is about how we run those projects so they reach production.

Can you take over an AI system another supplier built?

Often, yes. We start by building an evaluation set from real usage and measuring how the current system actually performs, then review prompts, retrieval, running costs and data handling. You get an honest view of what to keep, what to fix first and what it costs to run — before any rewrite is discussed.

Start a project

Want a straight answer on an AI pilot?

Tell us which task you would give AI first, roughly how often it happens and what a wrong answer would cost. An engineer will reply with honest questions and a view on whether a pilot is worth running.

  1. 1A senior engineer reads your brief within one working day, and replies with questions or a first view.
  2. 2A 30-minute call to understand the goal, constraints and what good looks like — no sales script.
  3. 3A written proposal with scope, milestones, team and a GBP estimate you can take to your board.

Techsleight Labs is a trading name of Krapton IT Consultancy.

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