Company lists · Data verified August 2026

Top 25 B2B marketing agencies based in London, United Kingdom

Name: B2B marketing 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 1,446 companies tracked

There are 1,446 B2B marketing agencies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 19,620 professional contacts across them, including 3,003 with verified work emails and 1,225 with mobile numbers. London is the largest hub.

This list covers B2B marketing 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.

1,446Companies

19,620Contacts tracked

3,003Verified emails

1,225Mobile numbers

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The 25 largest B2B marketing agencies based in London, United Kingdom

Ranked by team size

Top 25 of 1,446 B2B marketing 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	Grapes Worldwide	London	201-500	396	74
4	Entourage	London	51-200	363	81
5	Vereigen Media	London	201-500	302	38
6	BNZSA	London	201-500	195	6
7	Account Media	London	51-200	186	39
8	Expandi Group	London	201-500	155	46
9	Publicis PRO	London	51-200	140	34
10	SPARK	London	51-200	133	18
11	METIA	London	201-500	131	44
12	BBN	London	1,001-5,000	85	8
13	Konica Minolta Marketing Services	London	501-1,000	85	1
14	Fight OR Flight	London	51-200	66	49
15	Ccgroup, A Hoffman Agency	London	51-200	66	18
16	CI Group	London	51-200	57	33
17	The Marketing Practice	London	501-1,000	52	30
18	Marathon B2B	London	51-200	52	1
19	D2ms	London	51-200	50	9
20	Initials CX	London	51-200	47	17
21	Advance Connects	London	51-200	45	20
22	Stack Solutions Group	London	201-500	39	4
23	Rocket Saas	London	51-200	38	25
24	The Croc	London	51-200	37	19
25	Lion Reach Media	London	51-200	28	9

Showing 25 of 1,446 B2B marketing agencies based in London, United Kingdom

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B2B marketing agencies based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 1446 HQs

1,225Contacts with mobile numbers

27Emails re-verified in last 30 days

Companies by employee count

1-10

956

11-50

378

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

B2B marketing agencies by metro in the United Kingdom

Metro	Companies
B2B marketing agencies in London	1446
B2B marketing agencies in Manchester	191
B2B marketing agencies in Birmingham	115
B2B marketing agencies in Leeds	86
B2B marketing agencies in Bristol	71
B2B marketing agencies in Liverpool	49
B2B marketing agencies in Glasgow	46

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 marketing 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; 27 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 marketing agencies are there based in London, United Kingdom?

There are 1,446 B2B marketing 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 marketing agencies?

London leads with 1446 headquartered companies, followed by Manchester (191) and Birmingham (115).

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 3,003 verified decision-maker contacts tracked across these 1,446 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.