Company lists · Data refreshed October 2026

Top 23 Artificial intelligence reasoning companies based in the United Kingdom

RevenueBase identified 358 company matches for artificial intelligence reasoning companies associated with the United Kingdom as of October 2026 and tracks 5,963 professional contacts across them, including 1,812 with verified work emails. London is the largest hub.

This list covers company matches for artificial intelligence reasoning companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built
358Companies
5,963Contacts tracked
1,812Verified emails
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The 23 largest artificial intelligence reasoning companies based in the United Kingdom

Ranked by team size
Top 23 of 358 company matches for artificial intelligence reasoning companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Oct 1, 2026201-500564 contacts →

Exact match

“Founded in 2014, Faculty is one of Europe’s leading applied AI companies.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Oct 1, 2026201-500447 contacts →

Exact match

“InstaDeep is a pioneer in decision-making AI, driven by the belief that AI can help everyone.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3Exact matchReading, United KingdomHQ recorded Oct 1, 202651-200233 contacts →

Exact match

“At ActiveOps, we believe the ability to make every decision – the right decision, at the right time, will transform operations.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-200197 contacts →

Exact match

“Galytix (GX) is a specialised AI firm built exclusively for financial institutions.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20098 contacts →

Exact match

“Run your most expensive operations for a third of the cost.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6Exact matchEdinburgh, United KingdomHQ recorded Oct 1, 202651-20088 contacts →

Exact match

“Optima Partners' AI-led approach to business transformation integrates scalable, systemised decision-making with comprehensive, tailored solutions.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20069 contacts →

Exact match

“RajYug is an enterprise AI systems group building intelligence platforms for large organizations operating at scale.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20055 contacts →

Exact match

“We build AI Native companies.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20052 contacts →

Exact match

“Mesh-AI is an award-winning consultancy that exists to reimagine how global enterprises operate, making data and AI their competitive advantage.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10Exact matchManchester, United KingdomHQ recorded Oct 1, 202651-20050 contacts →

Exact match

“85% of AI pilots die in PowerPoint.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5048 contacts →

Exact match

“Adarga is a leading AI company purpose-built for Defence, Security & Resilience.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12Exact matchWickham, United KingdomHQ recorded Oct 1, 202651-20041 contacts →

Exact match

“Dootrix is a pioneering software technology consultancy for organisations that know the future will not wait.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13Exact matchNorwich, United KingdomHQ recorded Oct 1, 202611-5041 contacts →

Exact match

“Rainbird solves the limitations of generative Al in high-stakes applications, closing the gap from PoC to Production.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20038 contacts →

Exact match

“We believe in a future where humans dream and AI executes.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5034 contacts →

Exact match

“SigTech is ushering in a new era where human experts and AI agents collaborate together to accomplish what was impossible before.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16Exact matchThorpe, United KingdomHQ recorded Oct 1, 202611-5030 contacts →

Exact match

“AI adoption built on nearly four decades of solving operational problems properly.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5027 contacts →

Exact match

“Enterprise-grade AI for Finance.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Oct 1, 20261-1026 contacts →

Exact match

“Enabling better, compliant, engagement in retail finance.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19Exact matchDurham, United KingdomHQ recorded Oct 1, 202611-5025 contacts →

Exact match

“Melian Dialogue, a forward-thinking consulting firm based in the UK, specialises in the innovative field of artificial intelligence, particularly at the nexus of behavioural…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20Exact matchWarwickshire, United KingdomHQ recorded Oct 1, 202611-5022 contacts →

Exact match

“Sendient is an AI focused solutions provider, that supports organisations drive efficiency and profitability.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5022 contacts →

Exact match

“Brainpool is an Artificial Intelligence services company powered by a global network of 500 AI and Machine Learning experts coming from some of the leading AI hubs such as UCL…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Oct 1, 20261-1021 contacts →

Exact match

“Empowering businesses with AI Agents that deliver unparalleled accuracy and drive measurable ROI, we simplify the journey from visionary AI concepts to transformative, impactful…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5021 contacts →

Exact match

“Enterprise-grade AI reasoning engine | AI Agent SDK & Orchestration Layer | Agent Marketplace : x.com/openservai : https://t.me/openservai :@openservai …”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

Showing 23 of 358 artificial intelligence reasoning companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,812 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Artificial intelligence reasoning companies based in the United Kingdom at a glance

As of Oct 1, 2026
30.4%Verified-email coverage
16.7Average contacts per company
1-10Median size (employees)
61.2%Largest-city concentration · London
Oct 1, 2026Page data refreshed

Companies by employee count

1-10
221
11-50
100
51-200
27
201-500
8
1,001-5,000
2

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 358 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “artificial intelligence reasoning companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 1,812 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Artificial intelligence reasoning companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “artificial intelligence reasoning companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many artificial intelligence reasoning companies are there based in the United Kingdom?

RevenueBase identified 358 company matches for artificial intelligence reasoning companies associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Faculty tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most artificial intelligence reasoning companies?

London leads with 219 company records, followed by Manchester (7) and Oxford (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,812 professional contacts with verified work emails tracked across these 358 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.