Company lists · Data verified August 2026

Top 25 B2B lead generation agencies based in London, United Kingdom

Name: B2B lead generation agencies 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 472 companies tracked

There are 472 B2B lead generation agencies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 5,300 professional contacts across them, including 1,166 with verified work emails and 277 with mobile numbers. London is the largest hub.

This list covers B2B lead generation agencies 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.

472Companies

5,300Contacts tracked

1,166Verified emails

277Mobile numbers

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The 25 largest B2B lead generation agencies based in London, United Kingdom

Ranked by team size

Top 25 of 472 B2B lead generation agencies 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	Digitalzone	London	501-1,000	557	137
2	MVF	London	201-500	417	246
3	Entourage	London	51-200	363	81
4	Vereigen Media	London	201-500	302	38
5	BNZSA	London	201-500	195	6
6	Account Media	London	51-200	186	39
7	Interlink	London	51-200	181	29
8	Publicis PRO	London	51-200	140	34
9	Angsana NEW Business Agency	London	11-50	60	17
10	The Marketing Practice	London	501-1,000	52	30
11	Marathon B2B	London	51-200	52	1
12	The Think Tank	London	11-50	45	25
13	Advance Connects	London	51-200	45	20
14	EI Global B2B Marketing Intelligence	London	11-50	42	17
15	Seventic	London	11-50	38	4
16	Lion Reach Media	London	51-200	28	9
17	Digiio	London	11-50	27	21
18	Wonderful	London	11-50	26	5
19	Chiief	London	11-50	25	11
20	Recruitment Revenue	London	11-50	25	4
21	VELO	London	11-50	24	16
22	Outbound Partners	London	51-200	24	3
23	Bordeaux & Burgundy	London	11-50	23	10
24	Custom Intelligence	London	11-50	23	2
25	BIG Wolf Marketing	London	51-200	16	1

Showing 25 of 472 B2B lead generation agencies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,166 reachable decision-makers.

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B2B lead generation agencies based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 488 HQs

277Contacts with mobile numbers

6Emails re-verified in last 30 days

Companies by employee count

1-10

308

11-50

119

51-200

201-500

501-1,000

B2B lead generation agencies by metro in the United Kingdom

Metro	Companies
B2B lead generation agencies in London	488
B2B lead generation agencies in Manchester	81
B2B lead generation agencies in Birmingham	32
B2B lead generation agencies in Leeds	22
B2B lead generation agencies in Bristol	21
B2B lead generation agencies in Glasgow	15
B2B lead generation agencies in Brighton	14

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 lead generation agencies”, 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 B2B lead generation agencies are there based in London, United Kingdom?

There are 472 B2B lead generation agencies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most B2B lead generation agencies?

London leads with 488 headquartered companies, followed by Manchester (81) and Birmingham (32).

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 1,166 verified decision-maker contacts tracked across these 472 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.