Company lists · Data verified August 2026

Top 21 B2B data providers based in London, United Kingdom

Name: B2B data providers 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 146 companies tracked

There are 146 B2B data providers headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,462 professional contacts across them, including 324 with verified work emails and 77 with mobile numbers. London is the largest hub.

This list covers B2B data providers 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.

146Companies

1,462Contacts tracked

324Verified emails

77Mobile numbers

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The 21 largest B2B data providers based in London, United Kingdom

Ranked by team size

Top 21 of 146 B2B data providers 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	Vereigen Media	London	201-500	302	38
2	Sagacity	London	51-200	148	105
	RevenueBasePublisher of this directory	Boston, MA	n/a	n/a	Try free
3	Cognition Solutions	London	201-500	79	55
4	Marathon B2B	London	51-200	52	1
5	Advance Connects	London	51-200	45	20
6	EI Global B2B Marketing Intelligence	London	11-50	42	17
7	Pearlfinders The Sales Intelligence Platform	London	11-50	36	20
8	Custom Intelligence	London	11-50	23	2
9	Callent Tech LTD	London	51-200	12	2
10	IIRIS	London	201-500	9	8
11	Demand Studio	London	51-200	7	5
12	Neptik	London	11-50	7	4
13	Perlon AI	London	11-50	7	4
14	B2B Consultancy Services	London	11-50	7	1
15	Guruaxis	London	11-50	5	1
16	Intentify Demand	London	11-50	3	3
17	Bizvibe	London	51-200	3	2
18	Amesmo	London	11-50	2	1
19	Bring Commerce	London	11-50	2	1
20	Clicksincontext	London	11-50	2	1
21	Nsibandze Outsourcing NOS	London	11-50	1	1

Showing 21 of 146 B2B data providers based in London, United Kingdom

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B2B data providers based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 146 HQs

77Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

B2B data providers by metro in the United Kingdom

Metro	Companies
B2B data providers in London	146
B2B data providers in Manchester	22
B2B data providers in Birmingham	13
B2B data providers in Cambridge	8
B2B data providers in Brighton	6
B2B data providers in Leeds	6
B2B data providers in Bournemouth	5

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 “B2B data providers”, 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; 3 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 B2B data providers are there based in London, United Kingdom?

There are 146 B2B data providers headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most B2B data providers?

London leads with 146 headquartered companies, followed by Manchester (22) and Birmingham (13).

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 324 verified decision-maker contacts tracked across these 146 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.