Company lists · Data refreshed September 2026

Top 23 Advertising and marketing agencies based in the United Kingdom

Name: Advertising and marketing agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 18,871 companies tracked

RevenueBase identified 18,871 company matches for advertising and marketing agencies associated with the United Kingdom as of September 2026 and tracks 175,888 professional contacts across them, including 42,667 with verified work emails and 14,939 with mobile numbers. London is the largest hub.

This list covers company matches for advertising and marketing agencies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 23, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 23, 2026 How this list was built

18,871Companies

175,888Contacts tracked

42,667Verified emails

14,939Mobile numbers

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The 23 largest advertising and marketing agencies based in the United Kingdom

Ranked by team size

Top 23 of 18,871 company matches for advertising and marketing agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 23, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Publicis Media	Exact match	London, United KingdomHQ recorded Sep 23, 2026	10001+	6,901 contacts →
	Exact match “Publicis Media harnesses the power of modern media through leading agency brands Dysrupt, Infinite Roar, Publicis Collective, Publicis Health Media, Spark Foundry, Starcom and…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
2	Clinic	Exact match	London, United KingdomHQ recorded Sep 23, 2026	n/a	5,287 contacts →
	Exact match “Clinic is an independent creative agency.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
3	Essencemediacom	Exact match	London, United KingdomHQ recorded Sep 23, 2026	10001+	3,692 contacts →
	Exact match “We discover the breakthroughs that brands need to win.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
4	Iprospect	Exact match	London, United KingdomHQ recorded Sep 23, 2026	5,001-10,000	2,366 contacts →
	Exact match “iProspect, a dentsu company, is a leading global digital-first media agency.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
5	Jellyfish	Exact match	London, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	2,119 contacts →
	Exact match “Jellyfish \| Move Faster.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
6	APS Group	Exact match	Stockport, United KingdomHQ recorded Sep 23, 2026	501-1,000	1,152 contacts →
	Exact match “We’ve been delivering marketing and communications since 1961.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
7	Omnicom Media Group UK	Exact match	London, United KingdomHQ recorded Sep 23, 2026	5,001-10,000	983 contacts →
	Exact match “OMG UK delivers transformational experiences for consumers, clients and talent.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
8	Dentsu X	Exact match	London, United KingdomHQ recorded Sep 23, 2026	5,001-10,000	941 contacts →
	Exact match “Welcome to dentsu X.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
9	Uber Agency	Exact match	Leeds, United KingdomHQ recorded Sep 23, 2026	n/a	811 contacts →
	Exact match “Uber means over, above more than.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
10	Everywhere	Exact match	London, United KingdomHQ recorded Sep 23, 2026	n/a	772 contacts →
	Exact match “Everywhere is a digital studio that’s transforming businesses with its powerful, considered products and services.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
11	Linney	Exact match	Mansfield, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	649 contacts →
	Exact match “We’re Linney, a connected marketing partner helping brands turn complexity into clarity across digital, physical and ecommerce channels.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
12	CROUD	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	643 contacts →
	Exact match “We're an independent global media, creative, and data agency helping our clients make their next best move.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
13	Mullenlowe Global	Exact match	London, United KingdomHQ recorded Sep 23, 2026	1,001-5,000	544 contacts →
	Exact match “Happy to see you came here to learn a little more about us!” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
14	Anything IS Possible	Exact match	Brighton And Hove, United KingdomHQ recorded Sep 23, 2026	51-200	532 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
15	MG OMD	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	527 contacts →
	Exact match “MG OMD, part of Omnicom Media, brings innovation, insight and creativity to the world of media.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
16	Karla Otto	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	524 contacts →
	Exact match “WHO WE ARE Founded in 1982, Karla Otto is a full-service brand-building agency, operating from fifteen cities across the globe, Milan, Paris, London, Munich, Dubai, Riyadh…” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
17	BBH London	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	504 contacts →
	Exact match “We believe in the power of difference to make a difference.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
18	Ogilvy UK	Exact match	United KingdomHQ recorded Sep 23, 2026	501-1,000	502 contacts →
	Exact match “Ogilvy UK inspires brands and people to impact the world.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
19	M C Saatchi Performance	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	457 contacts →
	Exact match “We are a Global digital media agency specializing in taking a human approach to connecting brands with people across all channels.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
20	TMW	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	439 contacts →
	Exact match “TMW, part of Accenture Song, is an integrated creative agency.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
21	Essencemediacom UK	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	416 contacts →
	Exact match “EssenceMediacom is WPP Media's newest and largest agency, committed to delivering breakthroughs for brands in the New Communications Economy.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
22	The Delta Group	Exact match	London, United KingdomHQ recorded Sep 23, 2026	501-1,000	389 contacts →
	Exact match “The Delta Group is committed to service excellence in-store, outdoor and online.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase
23	Bulletproof	Exact match	London, United KingdomHQ recorded Sep 23, 2026	201-500	358 contacts →
	Exact match “Bulletproof is the world’s largest independent brand agency, creating desire through disruption to accelerate growth, drive standout, and fuel fandom.” Recorded in the RevenueBase company graph · Sep 23, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “advertising and marketing agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 23 of 18,871 advertising and marketing agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 42,667 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Advertising and marketing agencies based in the United Kingdom at a glance

As of Sep 23, 2026

24.3%Verified-email coverage

8.5%Mobile-number coverage

9.3Average contacts per company

1-10Median size (employees)

32.6%Largest-city concentration · London

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

14,202

11-50

3,825

51-200

614

201-500

102

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 25.0d

32,5420–30

9,33331–60

54761–90

3790–180

208180+

Company record updated

Median 88.0d

00–30

22,84331–60

84,97861–90

59,05790–180

9,010180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “advertising and marketing agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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: Every displayed company carries at least one verified work email. RevenueBase tracks 42,667 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 23, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Advertising and marketing agencies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “advertising and marketing agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many advertising and marketing agencies are there based in the United Kingdom?

RevenueBase identified 18,871 company matches for advertising and marketing agencies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Publicis Media tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most advertising and marketing agencies?

London leads with 6148 company records, followed by Manchester (674) and Birmingham (403).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 42,667 professional contacts with verified work emails tracked across these 18,871 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 23, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.