Company lists · Data verified August 2026

Top 25 Artificial intelligence reasoning companies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 132 companies tracked

There are 132 artificial intelligence reasoning companies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,445 professional contacts across them, including 611 with verified work emails and 120 with mobile numbers. London is the largest hub.

This list covers artificial intelligence reasoning companies headquartered in London, 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.

132Companies

1,445Contacts tracked

611Verified emails

120Mobile numbers

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The 25 largest artificial intelligence reasoning companies based in London, United Kingdom

Ranked by team size

Top 25 of 132 artificial intelligence reasoning companies based in London, 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	OWKIN	London	201-500	467	266
2	Quantco	London	201-500	226	180
3	Normal Computing	London	51-200	68	30
4	Conquer AI	London	51-200	51	4
5	Finster AI	London	11-50	27	11
6	Goodfolio	London	1-10	24	15
7	Brainpool AI	London	11-50	21	9
8	Clairo	London	1-10	20	13
9	Argenesis	London	51-200	20	12
10	Openserv	London	11-50	19	7
11	Catalect	London	11-50	18	8
12	Salus Optima	London	11-50	16	3
13	Zenpulsar	London	11-50	14	3
14	ani.tech	London	1-10	11	5
15	Deepsearch Labs	London	11-50	9	3
16	Sevva AI	London	11-50	9	3
17	Linearworks	London	1-10	8	1
18	Atman Labs	London	1-10	7	4
19	UMNAI	London	1-10	7	4
20	AI Infin8	London	11-50	6	6
21	Mercury Labs AI	London	11-50	6	4
22	Bering	London	1-10	5	4
23	AIN	London	11-50	4	1
24	Captide	London	11-50	3	2
25	The Applied AI Company Appliedai	London	51-200	2	2

Showing 25 of 132 artificial intelligence reasoning companies based in London, United Kingdom

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Artificial intelligence reasoning companies based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 154 HQs

120Contacts with mobile numbers

6Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Artificial intelligence reasoning companies by metro in the United Kingdom

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 London, 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; 6 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 London, United Kingdom?

There are 132 artificial intelligence reasoning companies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

OWKIN, 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 611 verified decision-maker contacts tracked across these 132 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.