Company lists · Data verified August 2026

Top 25 Artificial intelligence reasoning companies based in the United Kingdom

Name: Artificial intelligence reasoning companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 240 companies tracked

There are 240 artificial intelligence reasoning companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 4,044 professional contacts across them, including 1,720 with verified work emails and 286 with mobile numbers. London is the largest hub.

This list covers artificial intelligence reasoning companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

240Companies

4,044Contacts tracked

1,720Verified emails

286Mobile numbers

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The 25 largest artificial intelligence reasoning companies based in the United Kingdom

Ranked by team size

Top 25 of 240 artificial intelligence reasoning companies based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Quantium	London	1,001-5,000	1,274	687
2	Faculty	London	201-500	565	269
3	OWKIN	London	201-500	467	266
4	Quantco	London	201-500	226	180
5	Prospect 33	London	51-200	119	15
6	Normal Computing	London	51-200	68	30
7	Synergo Group	London	51-200	53	12
8	Conquer AI	London	51-200	51	4
9	Dtskill AI	West End	11-50	50	2
10	Dootrix DO The Next Thing NOW	Wickham	51-200	40	29
11	Finster AI	London	11-50	27	11
12	Melian Dialogue	Durham	11-50	25	1
13	Brainpool AI	London	11-50	21	9
14	Argenesis	London	51-200	20	12
15	Openserv	London	11-50	19	7
16	Intelligent Internet	London	11-50	18	10
17	Catalect	London	11-50	18	8
18	Conscium	n/a	11-50	16	6
19	Unolabs	London	51-200	16	3
20	Salus Optima	London	11-50	16	3
21	Xpertrule Software	Manchester	11-50	15	12
22	Zenpulsar	London	11-50	14	3
23	Accelerate Performance With Scotai	Linlithgow	11-50	13	7
24	Eagle EYE Technology	Guildford	11-50	10	8
25	Deepsearch Labs	London	11-50	9	3

Showing 25 of 240 artificial intelligence reasoning companies based in the United Kingdom

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

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 154 HQs

286Contacts with mobile numbers

12Emails re-verified in last 30 days

Companies by employee count

1-10

154

11-50

51-200

201-500

1,001-5,000

Artificial intelligence reasoning companies by metro

Metro	Companies
Artificial intelligence reasoning companies in London	154
Artificial intelligence reasoning companies in Oxford	5
Artificial intelligence reasoning companies in Cambridge	5
Artificial intelligence reasoning companies in Manchester	4
Artificial intelligence reasoning companies in Glasgow	3
Artificial intelligence reasoning companies in Bristol	3
Artificial intelligence reasoning companies in Reading	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “artificial intelligence reasoning companies”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 12 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 240 artificial intelligence reasoning companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Quantium, headquartered in London, tops this list with the largest team on record.

Which city has the most artificial intelligence reasoning companies?

London leads with 154 headquartered companies, followed by Oxford (5) and Cambridge (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,720 verified decision-maker contacts tracked across these 240 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.