Company lists · Data verified August 2026

Top 25 B2B marketing consulting agencies based in London, United Kingdom

Name: B2B marketing consulting 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 1,986 companies tracked

There are 1,986 B2B marketing consulting agencies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 16,342 professional contacts across them, including 2,763 with verified work emails and 1,302 with mobile numbers. London is the largest hub.

This list covers B2B marketing consulting 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.

1,986Companies

16,342Contacts tracked

2,763Verified emails

1,302Mobile numbers

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

Ranked by team size

Top 25 of 1,986 B2B marketing consulting 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	MBA	London	51-200	433	1
2	Entourage	London	51-200	363	81
3	R3	London	201-500	147	31
4	Publicis PRO	London	51-200	140	34
5	METIA	London	201-500	131	44
6	Hexaclicks	London	51-200	93	11
7	April SIX	London	51-200	89	19
8	Accord Marketing	London	51-200	87	61
9	BBN	London	1,001-5,000	85	8
10	Konica Minolta Marketing Services	London	501-1,000	85	1
11	Clarion Communications	London	51-200	75	38
12	The Bliss Group	London	51-200	72	37
13	Fight OR Flight	London	51-200	66	49
14	Ccgroup, A Hoffman Agency	London	51-200	66	18
15	CI Group	London	51-200	57	33
16	The Marketing Practice	London	501-1,000	52	30
17	D2ms	London	51-200	50	9
18	Flock Associates	London	51-200	41	28
19	Stack Solutions Group	London	201-500	39	4
20	TRUE	London	51-200	38	18
21	Scalewise	London	51-200	35	7
22	Mccann Enterprise	London	51-200	25	12
23	Alan. Agency	London	51-200	22	16
24	BIG Wolf Marketing	London	51-200	16	1
25	Adds Corporation	London	51-200	16	1

Showing 25 of 1,986 B2B marketing consulting agencies based in London, United Kingdom

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

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 1986 HQs

1,302Contacts with mobile numbers

6Emails re-verified in last 30 days

Companies by employee count

1-10

1,473

11-50

412

51-200

201-500

501-1,000

1,001-5,000

10001+

B2B marketing consulting agencies by metro in the United Kingdom

Metro	Companies
B2B marketing consulting agencies in London	1986
B2B marketing consulting agencies in Manchester	200
B2B marketing consulting agencies in Birmingham	113
B2B marketing consulting agencies in Leeds	97
B2B marketing consulting agencies in Bristol	74
B2B marketing consulting agencies in Edinburgh	69
B2B marketing consulting agencies in Liverpool	59

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 consulting 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 marketing consulting agencies are there based in London, United Kingdom?

There are 1,986 B2B marketing consulting agencies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most B2B marketing consulting agencies?

London leads with 1986 headquartered companies, followed by Manchester (200) and Birmingham (113).

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 2,763 verified decision-maker contacts tracked across these 1,986 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.