Company lists · Data refreshed September 2026

Top 25 B2B advertising and marketing agencies based in the United Kingdom

Name: B2B 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 27, 2026 26,126 companies tracked

RevenueBase identified 26,126 company matches for B2B advertising and marketing agencies associated with the United Kingdom as of September 2026 and tracks 267,779 professional contacts across them, including 66,981 with verified work emails and 24,385 with mobile numbers. London is the largest hub.

This list covers company matches for B2B 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 27, 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 27, 2026 How this list was built

26,126Companies

267,779Contacts tracked

66,981Verified emails

24,385Mobile numbers

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The 25 largest B2B advertising and marketing agencies based in the United Kingdom

Ranked by team size

Top 25 of 26,126 company matches for B2B advertising and marketing agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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 27, 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 27, 2026 · View company records in RevenueBase
2	HH Global	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	5,657 contacts →
	Exact match “HH Global is the global leader in tech-enabled creative production and procurement.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3	Clinic	Exact match	London, United KingdomHQ recorded Sep 27, 2026	n/a	5,287 contacts →
	Exact match “Clinic is an independent creative agency.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4	Zenith	Exact match	London, United KingdomHQ recorded Sep 27, 2026	5,001-10,000	4,133 contacts →
	Exact match “Zenith is the ROI Agency.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5	Essencemediacom	Exact match	London, United KingdomHQ recorded Sep 27, 2026	10001+	3,692 contacts →
	Exact match “We discover the breakthroughs that brands need to win.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6	Mother	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	2,372 contacts →
	Exact match “Mother is one of the world’s most respected, independent creative companies.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7	Iprospect	Exact match	London, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
8	CARAT	Exact match	London, United KingdomHQ recorded Sep 27, 2026	5,001-10,000	2,182 contacts →
	Exact match “Carat is the world’s first media agency and is privileged to work with some of today’s most storied and innovative brands.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9	Jellyfish	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	2,119 contacts →
	Exact match “Jellyfish \| Move Faster.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10	OI	Exact match	London, United KingdomHQ recorded Sep 27, 2026	n/a	1,891 contacts →
	Exact match “We make content more rewarding.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11	We ARE Social	Exact match	London, United KingdomHQ recorded Sep 27, 2026	1,001-5,000	1,728 contacts →
	Exact match “We are a global socially-led creative agency, with unrivaled social media expertise.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12	APS Group	Exact match	Stockport, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
13	Design Bridge And Partners	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	1,117 contacts →
	Exact match “A WPP company, Design Bridge and Partners is a global brand design agency.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14	Omnicom Media Group UK	Exact match	London, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
15	Dentsu X	Exact match	London, United KingdomHQ recorded Sep 27, 2026	5,001-10,000	941 contacts →
	Exact match “Welcome to dentsu X.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16	VCCP	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	820 contacts →
	Exact match “VCCP is the global challenger network for challenger brands.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17	Uber Agency	Exact match	Leeds, United KingdomHQ recorded Sep 27, 2026	n/a	811 contacts →
	Exact match “Uber means over, above more than.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18	Everywhere	Exact match	London, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
19	JKR	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	726 contacts →
	Exact match “If you remember only one thing about JKR, it's Be Distinctive Everywhere.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20	Digitas UK	Exact match	London, United KingdomHQ recorded Sep 27, 2026	501-1,000	709 contacts →
	Exact match “We are Digitas.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21	The Mill	Exact match	London, United KingdomHQ recorded Sep 27, 2026	n/a	654 contacts →
	Exact match “The Mill is TransPerfect's creative studio built on decades of award-winning excellence and designed for a world where craft must scale.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22	Linney	Exact match	Mansfield, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
23	CROUD	Exact match	London, United KingdomHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
24	Influencer	Exact match	London, United KingdomHQ recorded Sep 27, 2026	201-500	640 contacts →
	Exact match “Influencer is a global creator marketing agency on a mission to shape the future of marketing by humanizing brands.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25	Mullenlowe Global	Exact match	London, United KingdomHQ recorded Sep 27, 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 27, 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 “B2B 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 25 of 26,126 B2B advertising and marketing agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 66,981 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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B2B advertising and marketing agencies based in the United Kingdom at a glance

As of Sep 27, 2026

25.0%Verified-email coverage

9.1%Mobile-number coverage

10.2Average contacts per company

1-10Median size (employees)

34.2%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

19,839

11-50

5,145

51-200

816

201-500

158

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 29.0d

38,7400–30

26,13231–60

1,73661–90

4790–180

326180+

Company record updated

Median 92.0d

00–30

28,65431–60

96,04061–90

128,41990–180

14,666180+

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 “B2B 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 66,981 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 27, 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.

B2B 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 “B2B advertising and marketing agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many B2B advertising and marketing agencies are there based in the United Kingdom?

RevenueBase identified 26,126 company matches for B2B 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 B2B advertising and marketing agencies?

London leads with 8946 company records, followed by Manchester (928) and Birmingham (520).

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 66,981 professional contacts with verified work emails tracked across these 26,126 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 27, 2026.

Ready to reach these companies? Verified emails and direct dials for all 26,126 B2B advertising and marketing agencies based in the United Kingdom. Start with a free account, no credit card.

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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.