Company lists · Data refreshed September 2026

Top 25 Paid advertising agencies based in London, United Kingdom

Name: Paid 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 5, 2026 752 companies tracked

RevenueBase identified 752 paid advertising agencies headquartered in London, United Kingdom as of September 2026 and tracks 7,086 professional contacts across them, including 914 with verified work emails. London is the largest hub.

This list covers paid 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 5, 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 5, 2026 86% judged on-target in blind review

752Companies

7,086Contacts tracked

914Verified emails

Explore all 752 companies → Free signup · no credit card · 500 free credits

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

Ranked by team size

Top 25 of 752 paid advertising agencies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names paid 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	ALL Response MediaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	178
	“All Response Media is the leading performance media planning and buying agency.” Source: company website · checked Sep 5, 2026
2	The Media PeopleIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	83
	“Powered by our people, our campaigns put your audience first.” Source: company website · checked Sep 5, 2026
3	OCM Digital MediaPartial evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
4	AMS Media GroupIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	50
	“From our office in London & Leeds, we seamlessly plan and buy media across all channels: digital, TV, cinema, OOH, radio, print, social and search.” Source: company website · checked Sep 5, 2026
5	Stellar SearchPartial evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
6	BAMBUPartial evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
7	KinaseIndirect evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
8	Automated CreativeIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	38
	“Our platform helps performance marketers scale social, display and retail media campaigns.” Source: company website · checked Sep 5, 2026
9	Bluedot AgencyPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	34
	“A disruptive, full-service, award-winning digital marketing & advertising agency for contemporary businesses, specialising in performance marketing, content marketing…” Source: company website · checked Sep 5, 2026
10	Bird MarketingIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	33
	“Bird UK - bird.co.uk Bird UAE - bird.ae Bird USA - bird.marketing Bird Marketing, an award-winning digital marketing agency, is a beacon of excellence in the digital landscape.” Source: company website · checked Sep 5, 2026
11	Somebody DigitalIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	32
	“Somebody is a full service digital agency with a one track mind – getting you customers, not just clicks.” Source: company website · checked Sep 5, 2026
12	PattrnsIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	31
	“Pattrns was founded on years of first class experience in all elements of biddable media from Search Ads 360, Google Ads and Meta Ads.” Source: company website · checked Sep 5, 2026
13	Iconic Digital Marketing Consultants LTDIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	30
	“Iconic Digital is a leading digital marketing agency based in London, UK.” Source: company website · checked Sep 5, 2026
14	Terrier AgencyPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	28
	“Based in London, Terrier has a team that has collectively over 50 years experience in digital advertising.” Source: company website · checked Sep 5, 2026
15	December19 B CorpIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	27
	“December19 is a media planning and buying agency.” Source: company website · checked Sep 5, 2026
16	RocketerIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	27
	“Rocketer are a multi platform Martech advertiser specialising prominently in the financial services vertical servicing clients on a global scale.” Source: company website · checked Sep 5, 2026
17	KAU Media GroupIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	27
	“KAU Media Group is a full service media agency that deliver compelling digital marketing solutions.” Source: company website · checked Sep 5, 2026
18	WebtopiaPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	26
	“Bespoke digital advertising strategy + creative Mission-driven ecomm brands need a different kind of agency.” Source: company website · checked Sep 5, 2026
19	ProsperwellIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	23
	“Prosperwell, previously known as Smooth Digital, is a London based Digital Marketing Agency that specialises in helping ambitious companies grow through a combination of Digital…” Source: company website · checked Sep 5, 2026
20	JWE MediaPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	23
	“At JWE Media, we take care of your marketing and advertising needs, from TV to Press, Out of Home to Digital, we manage the whole process ensuring we save you time and money.” Source: company website · checked Sep 5, 2026
21	Prospect KnightPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	22
	“Great online advertising demands a mix of disciplines.” Source: company website · checked Sep 5, 2026
22	Propel DigitalPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	21
	“At Propel Digital, we redefine what it means to be a true partner in paid media.” Source: company website · checked Sep 5, 2026
23	Onelink The NEW AGE Digital Growth AgencyPartial evidence	London, United KingdomHQ checked Sep 5, 2026	1-10	21
	“Onelink is a team of senior growth operators across paid, SEO, and marketing technology, working with scale-up and PE-backed businesses who've outgrown channel management and need…” Source: company website · checked Sep 5, 2026
24	AccuracastIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	19
	“Accuracast is an international digital marketing agency that works with ambitious brands to accelerate growth through data and technology.” Source: company website · checked Sep 5, 2026
25	Cardell MediaIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	19
	“For more than two decades, Cardell Media has been helping growing businesses implement successful online marketing.” Source: company website · checked Sep 5, 2026

Showing 25 of 752 paid advertising agencies based in London, United Kingdom

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

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 752 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

497

11-50

218

51-200

201-500

501-1,000

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 752 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 paid 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 “paid 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 paid 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, 914 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 5, 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.

Paid advertising agencies by metro in the United Kingdom

Paid advertising agencies in London752
Paid advertising agencies in Manchester106
Paid advertising agencies in Birmingham47
Paid advertising agencies in Bristol34
Paid advertising agencies in Leeds33
Paid advertising agencies in Nottingham33
Paid advertising agencies in Glasgow30

Frequently asked

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

RevenueBase identified 752 paid 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?

ALL Response Media, headquartered in London, tops this list with the largest team on record.

Which city has the most paid advertising agencies?

London leads with 752 headquartered companies, followed by Manchester (106) and Birmingham (47).

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 914 verified decision-maker contacts tracked across these 752 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 5, 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.