Company lists · Data refreshed September 2026

Top 19 Integrated marketing agencies based in London, United Kingdom

Name: Integrated marketing agencies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 2,392 companies tracked

RevenueBase identified 2,392 company matches for integrated marketing agencies associated with London, United Kingdom as of September 2026 and tracks 51,064 professional contacts across them, including 12,143 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for integrated marketing agencies associated with London, 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 4, 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 4, 2026 How this list was built

2,392Companies

51,064Contacts tracked

12,143Verified emails

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The 19 largest integrated marketing agencies based in London, United Kingdom

Ranked by team size

Top 19 of 2,392 company matches for integrated marketing agencies based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 4, 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	Essencemediacom	Exact match	London, United KingdomHQ recorded Sep 4, 2026	10001+	3,689 contacts →
	Exact match “We discover the breakthroughs that brands need to win.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
2	Iprospect	Exact match	London, United KingdomHQ recorded Sep 4, 2026	5,001-10,000	2,395 contacts →
	Exact match “iProspect, a dentsu company, is a leading global digital-first media agency.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
3	CARAT	Exact match	London, United KingdomHQ recorded Sep 4, 2026	5,001-10,000	2,229 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 4, 2026 · View company records in RevenueBase
4	Omnicom Media Group UK	Exact match	London, United KingdomHQ recorded Sep 4, 2026	5,001-10,000	993 contacts →
	Exact match “OMG UK delivers transformational experiences for consumers, clients and talent.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
5	T&p	Exact match	London, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	941 contacts →
	Exact match “A global, fully integrated agency with AI at its heart.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
6	MG OMD	Exact match	London, United KingdomHQ recorded Sep 4, 2026	201-500	553 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 4, 2026 · View company records in RevenueBase
7	Mullenlowe Global	Exact match	London, United KingdomHQ recorded Sep 4, 2026	1,001-5,000	547 contacts →
	Exact match “Happy to see you came here to learn a little more about us!” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
8	The7stars	Exact match	London, United KingdomHQ recorded Sep 4, 2026	201-500	296 contacts →
	Exact match “the7stars is the UK’s largest independent media agency, offering the best people, the best service and the best creative media campaigns.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
9	DMS	Exact match	London, United KingdomHQ recorded Sep 4, 2026	51-200	296 contacts →
	Exact match “WE ARE A GLOBAL CREATIVE DIGITAL AGENCY At DMS, we bring together a powerhouse of creative, media intelligence and digital disciplines under one roof to support world-class…” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
10	Newbase	Exact match	London, United KingdomHQ recorded Sep 4, 2026	501-1,000	282 contacts →
	Exact match “At NewBase we provide expert and independent marketing and advertising services across all media channels globally.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
11	Premier	Exact match	London, United KingdomHQ recorded Sep 4, 2026	51-200	274 contacts →
	Exact match “Creative communications for entertainment, arts and culture.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
12	Brands2life	Exact match	London, United KingdomHQ recorded Sep 4, 2026	51-200	221 contacts →
	Exact match “We’re an award-winning, founder-led, communications agency based in London, Minneapolis, New York and San Francisco with an extensive global capability.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
13	Harvard	Exact match	London, United KingdomHQ recorded Sep 4, 2026	51-200	217 contacts →
	Exact match “Harvard is an award-winning integrated Marketing and PR agency for tech brands big and small, with a full-service offering including: media and analyst relations, marketing…” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
14	Exposure	Exact match	London, United KingdomHQ recorded Sep 4, 2026	51-200	216 contacts →
	Exact match “Making brands culturally relevant since 1993.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
15	Kitchen	Exact match	London, United KingdomHQ recorded Sep 4, 2026	n/a	213 contacts →
	Exact match “Welcome to Kitchen.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
16	Havas London	Exact match	London, United KingdomHQ recorded Sep 4, 2026	201-500	163 contacts →
	Exact match “From pigeons to platforms, from news agency to integrated communications services, our story is one of constant reinvention.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
17	Grey London	Exact match	London, United KingdomHQ recorded Sep 4, 2026	201-500	158 contacts →
	Exact match “We are Grey London.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
18	R3	Exact match	London, United KingdomHQ recorded Sep 4, 2026	201-500	147 contacts →
	Exact match “R3 is now known as mediasense.” Recorded in the RevenueBase company graph · Sep 4, 2026 · View company records in RevenueBase
19	BD Network	Exact match	London, United KingdomHQ recorded Sep 4, 2026	11-50	147 contacts →
	Exact match “We are BD, an independent creative communications agency that’s been delivering Brand Difference for some of the world’s biggest brands since 1990.” Recorded in the RevenueBase company graph · Sep 4, 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 “integrated 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 19 of 2,392 integrated marketing agencies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 12,143 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Integrated marketing agencies based in London, United Kingdom at a glance

As of Sep 4, 2026

23.8%Verified-email coverage

21.3Average contacts per company

1-10Median size (employees)

Sep 4, 2026Page data refreshed

Companies by employee count

1-10

1,468

11-50

685

51-200

159

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 2,392 companies.

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 London, United Kingdom whose business descriptions match “integrated 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 12,143 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 4, 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.

Integrated marketing agencies by metro in the United Kingdom

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

How many integrated marketing agencies are there based in London, United Kingdom?

RevenueBase identified 2,392 company matches for integrated marketing agencies associated with London, 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?

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

Which city in the United Kingdom has the most integrated marketing agencies?

London leads the United Kingdom with 2,392 company records, followed by Manchester (269) and Birmingham (173).

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 12,143 professional contacts with verified work emails tracked across these 2,392 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 4, 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.