AI consultancy, London, since 2016
AI consultancy that ships working systems
QuantSpark is a London AI consultancy of around 70 strategists, data scientists, engineers and designers. Since 2016 we have taken FTSE 100 companies, private-equity portfolios and government departments from AI strategy to working software, in weeks rather than quarters. British Data Awards Consultancy of the Year 2026.
What an AI consultancy does
An AI consultancy helps an organisation decide where artificial intelligence will create value, then makes it happen: assessing readiness, choosing the use cases worth pursuing, selecting or building the systems, deploying them into daily operations and measuring the result. Most AI consultancies stop at the recommendation. QuantSpark carries the work through to a system your teams use every day, and we measure the value it produces rather than assuming it.
Strategy and software from one team.
The people who scope the work build it. Nothing is thrown over a wall to IT or a third party.
Working systems in weeks.
A production-candidate agent on your own stack in five weeks; a working prototype in four to six. Value is validated before a full build is funded.
You own what we build.
You own the code and the IP, and the ability to build the next one. Independent of any vendor, so the recommendation is honest.
Built for mid-market and private-equity-backed organisations
Our clients are typically organisations with £50m or more of revenue and complex operations: asset managers, retailers, manufacturers, professional-services firms, software businesses and government departments. Private-equity operating partners use us across portfolios because the same playbook repeats company to company.
AI consultancy services: one transparent ladder
Every engagement starts small and earns the next step.
Readiness Diagnostic
Ten questions. A scored readiness band and an honest diagnosis. No follow-up unless you ask.
- Scored readiness band
- Plain-English diagnosis
- Recommended next step
AiRE Diagnostic
A short list of AI bets ranked by value, feasibility and risk, a recommended roadmap, and an honest read: roll out, build, buy, or wait.
- Ranked AI bets
- Value and feasibility scoring
- Recommended roadmap
- Honest build / buy / wait call
First Agent
A production-candidate agent, live on your own stack in five weeks, built with your team so you leave owning both the agent and the ability to build the next one.
- One core workflow mapped (week 1)
- One production-candidate agent on your stack
- Your people building alongside us
- Runbook, eval harness, code and IP, all yours
AiRE Rollout
Fractional AI implementation across your existing stack. From AI experiments to AI operations.
- Tool deployment on your stack
- Team enablement
- Governance and guardrails
- Monthly reviews and Slack support
Labs Discovery
A working prototype on your data, in your workflow. Not a slide deck. Validated value and a scale roadmap.
- Process and data mapping
- Working prototype
- Validated value case
- Scale roadmap
Labs Build
An enterprise-grade system embedded in your operating model. You own the code and the IP.
- Production build
- Integration and embedding
- Team handover
- 12 months support
Every project is scoped individually. Book a discovery call and we will provide a detailed proposal within 48 hours.
Proof
Results we can put a number on
Generative AI-Enabled Lead Scoring Drives $120M+ Revenue for Clinical Research Organisation
Clinical Research Organisation
DataControl Platform: intelligent private equity data management
A mid-market private equity firm
Predictive maintenance and ops dashboards for a UK industrial manufacturer
UK industrial manufacturer (£800m turnover)
Award-winning work
How our AI consultancy works
- 1
Understand how you actually operate.
We map processes, information flows and decision points to find where value is created and where it gets stuck.
- 2
Find where better data and AI create value.
We rank the opportunities worth pursuing and set aside the ones that only look good on slides.
- 3
Design the right solution.
Buy, integrate or build, with no bias towards custom work, including telling you when you do not need us.
- 4
Build and embed.
Working products in weeks, embedded in your operating model, with your people trained to run and extend them.
An AI consultancy in London, working across the UK
We are based in central London and work on site with clients across the UK and in Europe. QuantSpark Limited is registered in England and Wales. Your data stays in your systems by default, you own the code and the IP, and delivery is GDPR-aligned.
QuantSpark Limited, 230 Blackfriars Road, London SE1 8NWBigger than a freelancer. Sharper than the big three.
The large consultancies are strong at strategy and analysis and rarely ship software; implementation goes to IT or a third party, on large junior teams at high day rates. Solo operators can build a tool but bring no team, no track record and no accountability. QuantSpark is the challenger AI consultancy in between: strategy and working software from one accountable team, more than a decade and 100+ engagements from FTSE 100 to government, and results tracked rather than assumed.
Frequently asked questions
What does an AI consultancy do?
How much does AI consultancy cost in the UK?
What is the difference between an AI consultant and an AI consultancy?
How do we choose an AI consultancy?
Do you only work with large enterprises?
Are you independent of OpenAI, Anthropic and Microsoft?
How quickly can you start?
Do you work outside London?
Ready to see what an AI consultancy that ships looks like?
Book a discovery call. Within 48 hours we will tell you where to start, honestly, and send a scoped proposal.