Company lists · Data refreshed September 2026

Top 25 Marketplace advertising agencies based in the United Kingdom

Name: Marketplace advertising agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 385 companies tracked

RevenueBase identified 385 company matches for marketplace advertising agencies associated with the United Kingdom as of September 2026 and tracks 2,754 professional contacts across them, including 914 with verified work emails. London is the largest hub.

This list covers company matches for marketplace advertising agencies associated with the 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 28, 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 28, 2026 How this list was built

385Companies

2,754Contacts tracked

914Verified emails

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The 25 largest marketplace advertising agencies based in the United Kingdom

Ranked by team size

Top 25 of 385 company matches for marketplace advertising agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Newbase	Exact match	London, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
2	ONE Agency Media	Exact match	Manchester, United KingdomHQ recorded Sep 28, 2026	11-50	75 contacts →
	Exact match “One Agency: Creating, Delivering and Connecting brands.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Spaceandpeople PLC	Exact match	Glasgow, United KingdomHQ recorded Sep 28, 2026	51-200	68 contacts →
	Exact match “SpaceandPeople PLC is the leading destination media agency.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	m3.agency	Exact match	Birmingham, United KingdomHQ recorded Sep 28, 2026	51-200	55 contacts →
	Exact match “M3 are a full service advertising & marketing agency, which offers creative, brand development, media planning, web development and digital marketing services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	OCM Digital Media	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	54 contacts →
	Exact match “OCM is a leading adtech agency providing solutions to advertisers, advertising agencies and to web, mobile & video publishers.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	AMS Media Group	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	50 contacts →
	Exact match “From our office in London & Leeds, we seamlessly plan and buy media across all channels: digital, TV, cinema, OOH, radio, print, social and search.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Media Agency Group	Exact match	Salford, United KingdomHQ recorded Sep 28, 2026	51-200	48 contacts →
	Exact match “Media Agency Group is an advertising agency specialising in the purchasing and planning of all media formats across the spectrum of advertising.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Universal Television & Media LTD	Exact match	Luton, United KingdomHQ recorded Sep 28, 2026	51-200	48 contacts →
	Exact match “TV ADVERTISING, TV COMMERCIALS, VIDEO & CONTENT PRODUCTION, ADVERTISING, SOCIAL MEDIA MARKETING AND BRAND CONSULTING FOR THE MOST AMBITIOUS BRANDS, BUSINESSES AND STARTUPS ON THE…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Astus Group	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	47 contacts →
	Exact match “We speak to Marketing Directors across all sectors all the time and we understand their challenges and board demands: Get More ROI.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	BAMBU	Exact match	London, United KingdomHQ recorded Sep 28, 2026	n/a	45 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Dianomi	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	40 contacts →
	Exact match “Dianomi™ is the leader in premium native advertising for the financial services, technology, corporate and lifestyle sectors.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Sembot	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	39 contacts →
	Exact match “Focus on strategy, not manually time-consuming tasks.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Automated Creative	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	38 contacts →
	Exact match “Our platform helps performance marketers scale social, display and retail media campaigns.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	CNS Media LTD	Exact match	Chesterfield, United KingdomHQ recorded Sep 28, 2026	11-50	38 contacts →
	Exact match “CNS Media is an independent, award-winning, full-service marketing agency, combining exceptional media buying power with digital and creative expertise.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Alliance Advertising And Marketing	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	36 contacts →
	Exact match “We are a dynamic group of multilingual professionals.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Mirabelle Communications LTD	Exact match	Croydon, United KingdomHQ recorded Sep 28, 2026	11-50	28 contacts →
	Exact match “Established in 1992 Mirabelle is a London based full service international marketing and advertising agency.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	December19 B Corp	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	27 contacts →
	Exact match “December19 is a media planning and buying agency.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	PAB Studios	Exact match	Wakefield, United KingdomHQ recorded Sep 28, 2026	11-50	27 contacts →
	Exact match “PAB Studios have 30 years experience working in advertising/marketing and cover a variety of disciplines including: press/radio/digital advertising, as well as TV advertising…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Radio Experts	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	24 contacts →
	Exact match “We are leading experts in planning, booking and buying radio advertising on all analogue, digital and On Demand platforms.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Smithfield Agency	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	24 contacts →
	Exact match “Where people and creativity drive real results.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Pimento	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	23 contacts →
	Exact match “Pimento is a community of agencies, offering a gateway to the independent sector, helping brands to grow by navigating the world of marketing with clear, expert guidance.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	JWE Media	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	23 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	MFM	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	23 contacts →
	Exact match “Media Futures Market (MFM) is a high-growth, independent media agency and marketplace.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	The GO Network	Exact match	Manchester, United KingdomHQ recorded Sep 28, 2026	11-50	22 contacts →
	Exact match “Eight years in and matches later, the part that still matters is watching what the right brand and the right agency build together.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	ONE DAY Agency	Exact match	Manchester, United KingdomHQ recorded Sep 28, 2026	11-50	21 contacts →
	Exact match “One Day Agency is an independent integrated advertising and marketing agency headquartered in Manchester, UK, with offices in London, Warsaw, Paris, and Berlin.” Recorded in the RevenueBase company graph · Sep 28, 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 “marketplace advertising 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 25 of 385 marketplace advertising agencies based in the United Kingdom

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Marketplace advertising agencies based in the United Kingdom at a glance

As of Sep 28, 2026

33.2%Verified-email coverage

7.2Average contacts per company

1-10Median size (employees)

41.0%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

250

11-50

110

51-200

501-1,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 385 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 the United Kingdom whose business descriptions match “marketplace advertising 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 914 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 28, 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.

Marketplace advertising agencies by metro

Marketplace advertising agencies in London158

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

How many marketplace advertising agencies are there based in the United Kingdom?

RevenueBase identified 385 company matches for marketplace advertising agencies associated with the 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?

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

Which city has the most marketplace advertising agencies?

London leads with 158 company records, followed by Manchester (18) and Birmingham (9).

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 914 professional contacts with verified work emails tracked across these 385 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 28, 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.