Company lists · Data verified August 2026

Top 25 B2B data providers based in the United Kingdom

Name: B2B data providers 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 502 companies tracked

There are 502 B2B data providers headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 6,723 professional contacts across them, including 1,855 with verified work emails and 582 with mobile numbers. London is the largest hub.

This list covers B2B data providers 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.

502Companies

6,723Contacts tracked

1,855Verified emails

582Mobile numbers

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The 25 largest B2B data providers based in the United Kingdom

Ranked by team size

Top 25 of 502 B2B data providers 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	Caci LTD	Birmingham	1,001-5,000	1,657	783
2	Qualifa	Brighton	51-200	440	2
	RevenueBasePublisher of this directory	Boston, MA	n/a	n/a	Try free
3	Vereigen Media	London	201-500	302	38
4	Sagacity	London	51-200	148	105
5	AIR Marketing	Exeter	51-200	123	47
6	GCL	Birmingham	51-200	120	18
7	EC Outsourcing Powered By Ison Xperiences	Sheffield	1,001-5,000	115	1
8	Durhamlane	Newcastle Upon Tyne	51-200	114	74
9	Scileads	Belfast	51-200	100	72
10	Pursuit Marketing	Glasgow	51-200	96	8
11	Cognition Solutions	London	201-500	79	55
12	Marathon B2B	London	51-200	52	1
13	Advance Connects	London	51-200	45	20
14	Parallel Partnerships LTD	Leeds	51-200	43	7
15	Think Pipeline LTD	Woking	51-200	38	2
16	Market Location	Sutton Coldfield	51-200	35	12
17	1 Stop Data LTD	Northern	51-200	35	3
18	Corpdata LTD	Teignmouth	51-200	34	6
19	SLM Connect	Manchester	201-500	27	1
20	Insight Data	n/a	51-200	22	9
21	The Data Business	Canterbury	51-200	12	10
22	Callent Tech LTD	London	51-200	12	2
23	IIRIS	London	201-500	9	8
24	Demand Studio	London	51-200	7	5
25	Bizibl	Welwyn Garden City	51-200	3	2

Showing 25 of 502 B2B data providers based in the United Kingdom

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B2B data providers based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 146 HQs

582Contacts with mobile numbers

15Emails re-verified in last 30 days

Companies by employee count

1-10

267

11-50

166

51-200

201-500

501-1,000

1,001-5,000

B2B data providers by metro

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 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; 15 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 the United Kingdom?

There are 502 B2B data providers headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Caci LTD, headquartered in Birmingham, 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 1,855 verified decision-maker contacts tracked across these 502 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.