Company lists · Data refreshed September 2026

Top 25 Retargeting advertising agencies based in London, United Kingdom

Name: Retargeting advertising 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 6, 2026 1,350 companies tracked

RevenueBase identified 1,350 retargeting advertising agencies headquartered in London, United Kingdom as of September 2026 and tracks 13,995 professional contacts across them, including 2,366 with verified work emails. London is the largest hub.

This list covers retargeting advertising agencies headquartered in London, 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 6, 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 HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review

1,350Companies

13,995Contacts tracked

2,366Verified emails

Explore all 1,350 companies → Free signup · no credit card · 500 free credits

The 25 largest retargeting advertising agencies based in London, United Kingdom

Ranked by team size

Top 25 of 1,350 retargeting advertising agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names retargeting 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.
#	Company	Headquarters	Employees	Contacts
1	M C Saatchi PerformanceIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	201-500	457
	“We are a Global digital media agency specializing in taking a human approach to connecting brands with people across all channels.” Source: company website · checked Sep 6, 2026
2	MVFIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	201-500	401
	“MVF powers growth for our clients by connecting them to potential customers.” Source: company website · checked Sep 6, 2026
3	Kinesso Uk&iIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	501-1,000	194
	“KINESSO UK is the award-winning, tech-driven performance marketing agency delivering actionable growth for direct clients and agency partners.” Source: company website · checked Sep 6, 2026
4	ALL Response MediaIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	178
	“All Response Media is the leading performance media planning and buying agency.” Source: company website · checked Sep 6, 2026
5	BIG GroupIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	177
	“Founded in 1991, with offices in Amsterdam, Bath, Dubai and London our award-winning employee-owned company has consistently ranked as one of the UK's leading independent digital…” Source: company website · checked Sep 6, 2026
6	Expandi GroupIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	201-500	155
	“Expandi Group is a global leader in AdTech, MarTech and Managed Services.” Source: company website · checked Sep 6, 2026
7	CrimtanPartial evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	130
	“Crimtan was established in 2009 with a clear mission: to be a trusted partner for brands navigating the complex world of programmatic advertising.” Source: company website · checked Sep 6, 2026
8	FOUNDIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	104
	“We're Found, the Everysearch™ agency.” Source: company website · checked Sep 6, 2026
9	The Media PeopleIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	83
	“Powered by our people, our campaigns put your audience first.” Source: company website · checked Sep 6, 2026
10	GA AgencyIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	70
	“GA Agency is an award-winning digital marketing agency helping brands all over the world grow their business and revenue in the online space.” Source: company website · checked Sep 6, 2026
11	ClickscoIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	66
	“As a new chapter in our Digital Agency begins, we are also a fantastic place to work, with a reputation for discovering and nurturing some of the finest minds in the business…” Source: company website · checked Sep 6, 2026
12	77agencyIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	64
	“We are an award-winning full-service digital agency, part of Jakala group with 1,800 employees across 16 countries around the world.” Source: company website · checked Sep 6, 2026
13	ROASTIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	57
	“We are ROAST.” Source: company website · checked Sep 6, 2026
14	OCM Digital MediaPartial evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	54
	“OCM is a leading adtech agency providing solutions to advertisers, advertising agencies and to web, mobile & video publishers.” Source: company website · checked Sep 6, 2026
15	Wediscover Performance Marketing & Technology AgencyIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	53
	“WeDiscover was created to redefine performance marketing by integrating cutting-edge technology with expert performance marketers.” Source: company website · checked Sep 6, 2026
16	Stellar SearchIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	48
	“We're a strategic digital marketing agency specialising in Paid Search, SEO, Google Shopping, Amazon and Social.” Source: company website · checked Sep 6, 2026
17	Harvest DigitalIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	48
	“We are a leading independent digital media agency.” Source: company website · checked Sep 6, 2026
18	BAMBUPartial evidence	London, United KingdomHQ checked Sep 6, 2026	n/a	45
	“Bambu is an online marketing and advertising agency based in London, working with startup and growth brands across the UK, Europe and North America, founded by two ex-WPP…” Source: company website · checked Sep 6, 2026
19	Beautiful DigitalIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	44
	“Beautiful Digital is a full service digital marketing agency.” Source: company website · checked Sep 6, 2026
20	PropellerIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	44
	“We’re a digital agency delivering stand-out experiences that generate results.” Source: company website · checked Sep 6, 2026
21	SembotIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	39
	“Focus on strategy, not manually time-consuming tasks.” Source: company website · checked Sep 6, 2026
22	KinaseIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	39
	“Kinase is a leading Digital Marketing Agency providing services to some of the UK’s top companies.” Source: company website · checked Sep 6, 2026
23	Automated CreativeIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	38
	“Our platform helps performance marketers scale social, display and retail media campaigns.” Source: company website · checked Sep 6, 2026
24	Passion DigitalIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	36
	“We are problem solvers.” Source: company website · checked Sep 6, 2026
25	Haarty HanksIndirect evidence	London, United KingdomHQ checked Sep 6, 2026	11-50	35
	“Haarty Hanks is a digital marketing agency comprised of tech nerds, creative designers and innovative strategists that plan and execute exceptional brand communications and web…” Source: company website · checked Sep 6, 2026

Showing 25 of 1,350 retargeting advertising agencies based in London, United Kingdom

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Retargeting advertising agencies based in London, United Kingdom at a glance

As of Sep 6, 2026

1-10Median size (employees)

LondonLargest hub · 1350 HQs

Contacts with mobile numbers

Sep 6, 2026Data refreshed

Companies by employee count

1-10

885

11-50

385

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for London, over 1,350 companies.

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 retargeting 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 London, United Kingdom whose own description of what they do matches “retargeting 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 retargeting advertising agencies, and records with no verified work email. Companies headquartered outside London 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, 2,366 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 6, 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.

Retargeting advertising agencies by metro in the United Kingdom

Retargeting advertising agencies in London1350
Retargeting advertising agencies in Manchester177
Retargeting advertising agencies in Birmingham100
Retargeting advertising agencies in Leeds69
Retargeting advertising agencies in Glasgow58
Retargeting advertising agencies in Bristol55
Retargeting advertising agencies in Liverpool45
Retargeting advertising agencies in Nottingham42
Retargeting advertising agencies in Brighton30
Retargeting advertising agencies in Edinburgh30
Retargeting advertising agencies in Belfast27
Retargeting advertising agencies in Newcastle Upon Tyne27
Retargeting advertising agencies in Cardiff25

Frequently asked

How many retargeting advertising agencies are there based in London, United Kingdom?

RevenueBase identified 1,350 retargeting advertising agencies headquartered in London, 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?

M C Saatchi Performance, headquartered in London, tops this list with the largest team on record.

Which city has the most retargeting advertising agencies?

London leads with 1350 headquartered companies, followed by Manchester (177) and Birmingham (100).

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 2,366 verified decision-maker contacts tracked across these 1,350 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 6, 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.