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Company lists · Data refreshed September 2026

Top 25 Full-service advertising agencies based in the United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 5,445 companies tracked

RevenueBase identified 5,445 full-service advertising agencies headquartered in the United Kingdom as of September 2026 and tracks 68,816 professional contacts across them, including 17,416 with verified work emails and 5,796 with mobile numbers. London is the largest hub.

This list covers full-service advertising agencies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
5,445Companies
68,816Contacts tracked
17,416Verified emails
5,796Mobile numbers
Unlock all 5,445 companies Free signup · no credit card · 500 free credits

The 25 largest full-service advertising agencies based in the United Kingdom

Ranked by team size
Top 25 of 5,445 full-service advertising agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names full-service advertising agencies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
APS GroupIndirect evidence
Leicester, United Kingdom501-1,0001,157

“We’ve been delivering marketing and communications since 1961.”

Source: company website · checked Sep 3, 2026
2
Omnicom Media Group UKIndirect evidence
London, United Kingdom5,001-10,000993

“OMG UK delivers transformational experiences for consumers, clients and talent.”

Source: company website · checked Sep 3, 2026
3
NP DigitalIndirect evidence
London, United Kingdom1,001-5,000862

“Neil Patel has been recognized by the Wall Street Journal, Forbes, and the United Nations, to name a few, as one of the most influential and successful marketers and entrepreneurs…”

Source: company website · checked Sep 3, 2026
4
AnomalyIndirect evidence
London, United Kingdom501-1,000765

“Founded in 2004, Anomaly is a difficult to define, but exciting to work at 'new model' agency.”

Source: company website · checked Sep 3, 2026
5
LinneyIndirect evidence
Mansfield, United Kingdom1,001-5,000651

“We’re Linney, a connected marketing partner helping brands turn complexity into clarity across digital, physical and ecommerce channels.”

Source: company website · checked Sep 3, 2026
6
MG OMDIndirect evidence
London, United Kingdom201-500553

“MG OMD, part of Omnicom Media, brings innovation, insight and creativity to the world of media.”

Source: company website · checked Sep 3, 2026
7
Mullenlowe GlobalIndirect evidence
London, United Kingdom1,001-5,000547

“Happy to see you came here to learn a little more about us!”

Source: company website · checked Sep 3, 2026
8
BBH LondonIndirect evidence
London, United Kingdom201-500518

“We believe in the power of difference to make a difference.”

Source: company website · checked Sep 3, 2026
9
Ogilvy UKIndirect evidence
United Kingdom501-1,000499

“Ogilvy UK inspires brands and people to impact the world.”

Source: company website · checked Sep 3, 2026
10
TMWIndirect evidence
Bristol, United Kingdom201-500442

“TMW, part of Accenture Song, is an integrated creative agency.”

Source: company website · checked Sep 3, 2026
11
Essencemediacom UKIndirect evidence
Leeds, United Kingdom501-1,000416

“EssenceMediacom is WPP Media's newest and largest agency, committed to delivering breakthroughs for brands in the New Communications Economy.”

Source: company website · checked Sep 3, 2026
12
Grapes WorldwideIndirect evidence
London, United Kingdom201-500396

“Grapes Worldwide is a fastest growing global Marketing & Communication agency where we create “Story-Enabled Growth.” We are Data Obsessed and Strategically Engineered thinkers…”

Source: company website · checked Sep 3, 2026
13
DRPGIndirect evidence
Windsor, United Kingdom201-500341

“For over 45 years, DRPG has been delivering everything from video, events and digital right through to research, strategy and creative communications.”

Source: company website · checked Sep 3, 2026
14
The7starsIndirect evidence
London, United Kingdom201-500296

“the7stars is the UK’s largest independent media agency, offering the best people, the best service and the best creative media campaigns.”

Source: company website · checked Sep 3, 2026
15
NewbasePartial evidence
London, United Kingdom501-1,000282

“At NewBase we provide expert and independent marketing and advertising services across all media channels globally.”

Source: company website · checked Sep 3, 2026
16
Forsman & BodenforsIndirect evidence
London, United Kingdom201-500257

“Forsman & Bodenfors is a globally recognised, Swedish-founded creative collective.”

Source: company website · checked Sep 3, 2026
17
JaywingIndirect evidence
Leeds, United Kingdom501-1,000233

“Jaywing Part of the Stubben Edge Group We’re an award-winning creative, media and data agency.”

Source: company website · checked Sep 3, 2026
18
Bray LeinoIndirect evidence
Harefield, United Kingdom201-500184

“Increasing the size of your business.”

Source: company website · checked Sep 3, 2026
19
Cc33 Global LimitedIndirect evidence
Sheffield, United Kingdom201-500171

“CC33 is a boutique agency with big ideas providing marketing solutions tailored to specifically meet your sales and marketing needs.”

Source: company website · checked Sep 3, 2026
20
Havas LondonIndirect evidence
London, United Kingdom201-500163

“From pigeons to platforms, from news agency to integrated communications services, our story is one of constant reinvention.”

Source: company website · checked Sep 3, 2026
21
Grey LondonIndirect evidence
London, United Kingdom201-500158

“We are Grey London.”

Source: company website · checked Sep 3, 2026
22
Krow GroupIndirect evidence
Norwich, United Kingdom201-500149

“At krow Group, our ideas are designed to make a genuine difference, building your brand and making it easier to buy by capturing and converting people’s attention.”

Source: company website · checked Sep 3, 2026
23
ZenithIndirect evidence
London, United Kingdom5,001-10,000136

“Zenith is the ROI Agency.”

Source: company website · checked Sep 3, 2026
24
Zenith UKIndirect evidence
London, United Kingdom201-500133

“Welcome to Zenith – the ROI agency.”

Source: company website · checked Sep 3, 2026
25
METIAIndirect evidence
London, United Kingdom201-500131

“Metia is a global marketing agency with offices in London, Seattle, Austin and Singapore.”

Source: company website · checked Sep 3, 2026

Showing 25 of 5,445 full-service advertising agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 17,416 reachable decision-makers.

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Full-service advertising agencies based in the United Kingdom at a glance

As of Sep 3, 2026
1-10Median size (employees)
LondonLargest hub · 1819 HQs
5,796Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
3,784
11-50
1,339
51-200
204
201-500
41
501-1,000
13
1,001-5,000
6
5,001-10,000
4

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among full-service advertising agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

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
Companies headquartered in the United Kingdom whose own description of what they do matches “full-service advertising agencies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among full-service advertising agencies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 17,416 across the full list. 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 3, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Full-service advertising agencies by metro

  • Full-service advertising agencies in London1819
  • Full-service advertising agencies in Manchester203
  • Full-service advertising agencies in Birmingham123
  • Full-service advertising agencies in Leeds116
  • Full-service advertising agencies in Glasgow69
  • Full-service advertising agencies in Bristol65
  • Full-service advertising agencies in Edinburgh60

Frequently asked

How many full-service advertising agencies are there based in the United Kingdom?

RevenueBase identified 5,445 full-service advertising agencies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

APS Group, headquartered in Leicester, tops this list with the largest team on record.

Which city has the most full-service advertising agencies?

London leads with 1819 headquartered companies, followed by Manchester (203) and Birmingham (123).

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 17,416 verified decision-maker contacts tracked across these 5,445 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.

Ready to reach these companies? Verified emails and direct dials for all 5,445 full-service advertising agencies based in the United Kingdom. Start with a free account, no credit card.

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Related lists

Browse: Companies home · All United Kingdom lists · All Full-service advertising agencies lists · New lists

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.

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