Company lists · Data refreshed September 2026

Top 25 Engagement marketing agencies based in the United Kingdom

There are 7,765 engagement marketing agencies headquartered in the United Kingdom (RevenueBase, September 2026). RevenueBase tracks 98,432 professional contacts across them, including 25,790 with verified work emails and 9,337 with mobile numbers. London is the largest hub.

This list covers engagement marketing 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 2, 2026.

7,765Companies
98,432Contacts tracked
25,790Verified emails
9,337Mobile numbers
Unlock all 7,765 companies Free account · no credit card · 2 minutes

The 25 largest engagement marketing agencies based in the United Kingdom

Ranked by team size
Top 25 of 7,765 engagement marketing agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 2, 2026. Evidence rates how directly each company's own description names engagement marketing 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.
#CompanyHeadquartersEmployeesContactsVerified emails
1
IprospectIndirect evidence

“iProspect, a dentsu company, is a leading global digital-first media agency.”

Source: company website · checked Sep 2, 2026
London, United Kingdom5,001-10,0002,395743
2
CARATIndirect evidence

“Carat is the world’s first media agency and is privileged to work with some of today’s most storied and innovative brands.”

Source: company website · checked Sep 2, 2026
London, United Kingdom5,001-10,0002,229697
3
MKTGIndirect evidence

“For over 20 years MKTG S+E has led some of the most transformative sponsorships in sports & entertainment.”

Source: company website · checked Sep 2, 2026
London, United Kingdom1,001-5,0001,501191
4
NP DigitalIndirect evidence

“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 2, 2026
London, United Kingdom1,001-5,000862306
5
WongdoodyIndirect evidence

“We’re WongDoody, the creative technology agency.”

Source: company website · checked Sep 2, 2026
London, United Kingdom1,001-5,000846472
6
AnomalyIndirect evidence

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

Source: company website · checked Sep 2, 2026
London, United Kingdom501-1,000765426
7
IRISIndirect evidence

“Iris is The Participation Agency.”

Source: company website · checked Sep 2, 2026
London, United Kingdom501-1,000722215
8
LinneyPartial evidence

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

Source: company website · checked Sep 2, 2026
Mansfield, United Kingdom1,001-5,000651450
9
BBH LondonIndirect evidence

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

Source: company website · checked Sep 2, 2026
London, United Kingdom201-500518204
10
TMWIndirect evidence

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

Source: company website · checked Sep 2, 2026
Bristol, United Kingdom201-500442163
11
MVFIndirect evidence

“MVF powers growth for our clients by connecting them to potential customers.”

Source: company website · checked Sep 2, 2026
London, United Kingdom201-500417246
12
Grapes WorldwidePartial evidence

“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 2, 2026
London, United Kingdom201-50039674
13
Blackjack PromotionsIndirect evidence

“Blackjack are specialists in human connection, with expertise in the creation, delivery and deployment of travel retail and experiential campaigns.”

Source: company website · checked Sep 2, 2026
London, United Kingdom1,001-5,0003468
14
Forsman & BodenforsIndirect evidence

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

Source: company website · checked Sep 2, 2026
London, United Kingdom201-500257179
15
Powerforce GBPartial evidence

“Powerforce is an innovative and award-winning Field Marketing and Sales Solutions agency specialising in Strategic and On Demand Brand Activation campaigns.”

Source: company website · checked Sep 2, 2026
Winnersh Triangle, United Kingdom1,001-5,00023189
16

“Creating what matters - C3 Creative Code and Content provides brands and companies a relevant place in the lives of their customers.”

Source: company website · checked Sep 2, 2026
London, United Kingdom201-500217107
17
SMP GroupPartial evidence

“We are an insight led marketing communications team, delivering leading innovations and experiences that are proven to drive business growth.”

Source: company website · checked Sep 2, 2026
London, United Kingdom201-50020175
18
Billion Dollar BOYIndirect evidence

“Billion Dollar Boy is a global social agency with Creator Instinct™.”

Source: company website · checked Sep 2, 2026
London, United Kingdom201-50019199
19
AmplifyIndirect evidence

“Amplify is a global creative agency, specializing in experience, entertainment and culture.”

Source: company website · checked Sep 2, 2026
London, United Kingdom201-500180123
20
Cc33 Global LimitedPartial evidence

“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 2, 2026
Sheffield, United Kingdom201-50017128
21
Retail Marketing Group RMGIndirect evidence

“We are storytellers, mime-artists, gesticulators.”

Source: company website · checked Sep 2, 2026
Sindlesham Reading, United Kingdom201-50016726
22
Gekko GroupPartial evidence

“Gekko are a creative customer experience marketing agency, seeking to create campaigns which enhance the customer journey and our brands sales across retail, B2B and online…”

Source: company website · checked Sep 2, 2026
Newbury, United Kingdom201-50015922
23
Grey LondonIndirect evidence

“We are Grey London.”

Source: company website · checked Sep 2, 2026
London, United Kingdom201-50015869
24
Krow GroupIndirect evidence

“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 2, 2026
Norwich, United Kingdom201-5001491
25
Prose On Pixels FranceIndirect evidence

“We are Prose On Pixels France aka POP France.”

Source: company website · checked Sep 2, 2026
London, United Kingdom201-50013351

Showing 25 of 7,765 engagement marketing agencies based in the United Kingdom

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Engagement marketing agencies based in the United Kingdom at a glance

As of Sep 2, 2026
1-10Median size (employees)
LondonLargest hub · 3101 HQs
9,337Contacts with mobile numbers
Sep 2, 2026Data refreshed

Companies by employee count

1-10
5,390
11-50
1,908
51-200
350
201-500
60
501-1,000
9
1,001-5,000
15
5,001-10,000
4

Engagement marketing agencies by metro

MetroCompanies
Engagement marketing agencies in London3101
Engagement marketing agencies in Manchester340
Engagement marketing agencies in Birmingham164
Engagement marketing agencies in Leeds161
Engagement marketing agencies in Glasgow114
Engagement marketing agencies in Bristol111
Engagement marketing agencies in Edinburgh85

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 engagement marketing 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: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies
Companies headquartered in the United Kingdom whose own description of what they do matches “engagement marketing 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 engagement marketing 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.
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, 25,790 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 2, 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.

Frequently asked

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

There are 7,765 engagement marketing agencies headquartered in the United Kingdom as of September 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most engagement marketing agencies?

London leads with 3101 headquartered companies, followed by Manchester (340) and Birmingham (164).

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 25,790 verified decision-maker contacts tracked across these 7,765 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 2, 2026.

Ready to reach these companies? Verified emails and direct dials for all 7,765 engagement 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 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.