Company lists · Data verified August 2026

Top 24 Advertising consulting firms based in London, United Kingdom

Name: Advertising consulting firms 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 1,383 companies tracked

There are 1,383 advertising consulting firms headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 12,024 professional contacts across them, including 2,558 with verified work emails and 960 with mobile numbers. London is the largest hub.

This list covers advertising consulting firms 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.

1,383Companies

12,024Contacts tracked

2,558Verified emails

960Mobile numbers

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The 24 largest advertising consulting firms based in London, United Kingdom

Ranked by team size

Top 24 of 1,383 advertising consulting firms 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	MG OMD	London	201-500	553	332
2	The7stars	London	201-500	296	196
3	Newbase	London	501-1,000	282	28
4	Grey London	London	201-500	158	69
5	Zenith UK	London	201-500	133	12
6	Goodstuff	London	51-200	132	105
7	METIA	London	201-500	131	44
8	Instinctif Partners	London	201-500	128	35
9	The Kite Factory	London	51-200	111	78
10	The River Group	London	51-200	89	54
11	Accord Marketing	London	51-200	87	61
12	Konica Minolta Marketing Services	London	501-1,000	85	1
13	Clarion Communications	London	51-200	75	38
14	Forefront International Forefront	London	51-200	65	2
15	Geronimo	London	51-200	65	1
16	Ponderosa Agency	London	51-200	57	39
17	Seven Brands	London	51-200	47	11
18	Brandburp Digital A Fluper Company	London	51-200	30	1
19	Pirana Group	London	51-200	15	5
20	Mbastack	London	51-200	10	8
21	Flight Story	London	51-200	5	1
22	TIN Robot	London	51-200	3	1
23	Jacob Bailey Group	London	51-200	2	1
24	Media Campaign Group	London	51-200	2	1

Showing 24 of 1,383 advertising consulting firms based in London, United Kingdom

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Advertising consulting firms based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 1383 HQs

960Contacts with mobile numbers

13Emails re-verified in last 30 days

Companies by employee count

1-10

1,008

11-50

296

51-200

201-500

501-1,000

1,001-5,000

10001+

Advertising consulting firms by metro in the United Kingdom

Metro	Companies
Advertising consulting firms in London	1383
Advertising consulting firms in Manchester	133
Advertising consulting firms in Birmingham	89
Advertising consulting firms in Leeds	69
Advertising consulting firms in Bristol	55
Advertising consulting firms in Edinburgh	46
Advertising consulting firms in Glasgow	45

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 “advertising consulting firms”, 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; 13 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 advertising consulting firms are there based in London, United Kingdom?

There are 1,383 advertising consulting firms headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most advertising consulting firms?

London leads with 1383 headquartered companies, followed by Manchester (133) and Birmingham (89).

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 2,558 verified decision-maker contacts tracked across these 1,383 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.