Custom AI Development Company in the UK

GreyScript AI is a custom AI development company. We build production systems in the United Kingdom: AI agents, AI-native web and mobile apps, MCP tooling, retrieval, automation, and AI inside products you already ship.

UK buyers often search for an AI development company in the UK or a custom software partner that can work under UK GDPR. We treat those rules as part of the design. We do not certify compliance. Legal conclusions stay with your counsel. A 30-minute scoping call is how work starts, and we reply within one business day.

Custom AI and software we build

We are a custom software and AI development company, building in the United Kingdom. Each of the fourteen services is scoped on its own: web and mobile apps, agents, MCP tooling, integration, automation, and more. A strategy engagement does not commit you to a build.

AI strategy and readinessScore the ideas before any engineering starts. Usually 2 to 4 weeks. AI-native web and SaaSA new product where AI is the core, not a feature added later. AI-native mobile appsiOS and Android, with on-device inference where latency or privacy needs it. AI agents and copilotsCopilots, chat products, and multi-agent workflows, with a person on the actions that matter. MCP and agent toolingSafe, structured access to your database, internal APIs, and other tools. Custom modelsFine-tuning when a general-purpose model is not accurate enough. AI integrationAI added to a product you already ship, inside the current codebase. MLOpsDeploy, watch latency and drift, and keep token cost under control. Vision and languageDocuments, images, and text classification. Workflow automationThe internal process that actually wastes time, then the tools around it. Data preparationPipelines, cleaning, and schemas so retrieval and fine-tuning are reliable. Voice AIPhone lines and in-app voice, with a handoff to a person. Chatbots and website copilotsPre-sales and support, grounded on a curated knowledge base. AI governance and securityPrompt injection, tool misuse, and data exposure, before or after launch.

Examples from our work

These are illustrative examples. The company in each one is anonymized, and the figures are not a documented client result.

9 wk EU AI Act readiness for recruiting An inventory of what the system does, and where a person stays in the loop. Read the case study 96% A regulated document corpus Retrieval hit rate after 1.2 million documents were prepared. Read the case study 96% Coverage answers that cite the clause The system stops when the policy does not contain the answer. Read the case study 100% Drafts where every figure has a source Reviewed drafts sourced every figure. Unpublished claims never reached review. Read the case study

Working with us

Calls and written updates fit UK business hours when that helps your team. The same engineers who scope the work deploy it. A person on your side still approves the actions that matter.

There is no published price list. After the scoping call you get a written proposal with scope, timeline, and price in the currency you agree.

Most engagements start with the AI strategy work: a short, fixed-scope pass over your use cases before any build begins. If a use case does not hold up under that review, we say so before any engineering starts.

From first call to production

1DiscoveryMap your data and the narrowest use case that can prove value.

2PrototypeA working system against real data, measured before build.

3PilotA limited slice of real usage, before we harden it.

4ProductionThe same engineers integrate, monitor, and ship.

5OperateWe stay on latency, cost, and model updates.

See the full approach

UK GDPR and security

We build so your product can meet the privacy and security expectations UK teams already work under. We are not a certified compliance vendor.

UK GDPR. Purpose, minimization, access control, and a path for access, correction, and deletion when UK personal data is in scope.

Security review for prompt injection, tool misuse, and data exposure, on the governance engagement or inside a build.

Human approval on the actions that matter. The model can draft and retrieve; your team still decides.

For EU-wide rules, including the EU AI Act, see our Europe page.

Browse all case studies and the industries we write for, including fintech, healthcare, banking, insurance, payments, SaaS and mobile, retail, and logistics. We also work with companies in United States, Europe, Netherlands, and Australia.

Start a project

Book a scoping call. It is 30 minutes, with no deck. Tell us what you are building, what data it touches, and how you would measure success. Email contactus@greyscripttech.com. Read how this website handles personal information.

Questions

Is GreyScript AI a custom AI development company in the UK?

Yes. GreyScript AI builds custom AI systems in the United Kingdom: agents, apps, MCP tooling, retrieval, automation, and governance, with UK GDPR treated as a design constraint.

Do you certify UK GDPR compliance?

No. We design for UK GDPR. We do not certify compliance, and we do not give a legal opinion.

Do you publish UK prices?

No. There is no published price list. A scoping call is how a range gets set.

Are the case studies real client results?

No. Case studies on this site are illustrative. The company is anonymized, and the figures are not a documented client result.

Can we hire a single service?

Yes. Each of the fourteen services is scoped on its own.

Do you also work in Europe?

Yes. See the Europe page for GDPR and EU AI Act framing, or book a scoping call.