Company lists · Data refreshed September 2026

Top 25 Local advertising platforms based in London, United Kingdom

Name: Local advertising platforms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 137 companies tracked

RevenueBase identified 137 local advertising platforms headquartered in London, United Kingdom as of September 2026 and tracks 925 professional contacts across them, including 242 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers local advertising platforms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

137Companies

925Contacts tracked

242Verified emails

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The 25 largest local advertising platforms based in London, United Kingdom

Ranked by team size

Top 25 of 137 local advertising platforms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to local advertising platforms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	OCM Digital Media	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	54 contacts →
	Partial evidence “OCM is a leading adtech agency providing solutions to advertisers, advertising agencies and to web, mobile & video publishers.” Source: RevenueBase Database · checked Sep 28, 2026
2	DAX	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	51 contacts →
	Strong evidence “DAX is the largest digital audio advertising platform in the UK and one of the largest in the world.” Source: RevenueBase Database · checked Sep 28, 2026
3	gotu.io	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	44 contacts →
	Strong evidence “GotU is a marketing technology company developing hyperlocal advertising and marketing solutions for retailers, SMB marketing partners and local businesses everywhere.” Source: RevenueBase Database · checked Sep 28, 2026
4	Dianomi	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	40 contacts →
	Partial evidence “Dianomi™ is the leader in premium native advertising for the financial services, technology, corporate and lifestyle sectors.” Source: RevenueBase Database · checked Sep 28, 2026
5	Unruly	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	39 contacts →
	Indirect evidence “Nexxen empowers advertisers, agencies, publishers and broadcasters around the world to utilize data and advanced TV in the ways that are most meaningful to them.” Source: RevenueBase Database · checked Sep 28, 2026
6	Pattrns	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
7	Geomotive	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	27 contacts →
	Partial evidence “GEOMOTIVE is a marketplace that redefines DOOH advertising, fusing essential tools into a seamless ecosystem.” Source: RevenueBase Database · checked Sep 28, 2026
8	Hoopla Digital LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “Hoopla are an independent start-up online advertising network, specialising in online video, display, mobile and branded advertising solutions.” Source: RevenueBase Database · checked Sep 28, 2026
9	Billboard Media UK	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “At Billboard Media, we believe that every business, no matter the size, should have the opportunity to be seen by thousands of new customers every day.” Source: RevenueBase Database · checked Sep 28, 2026
10	Storeboost Retail	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	16 contacts →
	Partial evidence “The StoreBoost platform enables retailers and brands to automatically advertise to potential customers in proximity to their store when footfall is low – driving incremental…” Source: RevenueBase Database · checked Sep 28, 2026
11	Formula Media	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “We are the new media experts.” Source: RevenueBase Database · checked Sep 28, 2026
12	Infinity Outdoor	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “Infinity Outdoor specialises in the development and marketing of all types of giant format outdoor advertising throughout the UK and Europe.” Source: RevenueBase Database · checked Sep 28, 2026
13	Excite OOH	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “Excite OOH is a specialised outdoor advertising agency covering all aspects of media planning, buying, creative, reporting, strategy, etc.” Source: RevenueBase Database · checked Sep 28, 2026
14	1xl	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	10 contacts →
	Partial evidence “1XL brings you the power of local on a national scale.” Source: RevenueBase Database · checked Sep 28, 2026
15	City Outdoor Media	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	9 contacts →
	Indirect evidence “We are a media owner dedicated to the premium sector of the large format outdoor market.” Source: RevenueBase Database · checked Sep 28, 2026
16	Shareight	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “SHAREIGHT is a technology company providing value for multiple parties in the ever-growing digital marketplace.” Source: RevenueBase Database · checked Sep 28, 2026
17	8 Outdoor Media	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “8 Outdoor is the UK’s fastest growing out-of-home media owner, rapidly investing in digital roadside billboards and industry leading technology.” Source: RevenueBase Database · checked Sep 28, 2026
18	Admarket	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Strong evidence “Admarket.co is an advertising booking marketplace booking e-commerce platform for advertisers and media space owners.” Source: RevenueBase Database · checked Sep 28, 2026
19	Mass Media Outdoor Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Partial evidence “NOW PART OF CRYSTAL CLEAR MEDIA GROUP* Our Vision Statement: Mass Media Outdoor challenges the notion that digital out of home advertising is inaccessible to any brand.” Source: RevenueBase Database · checked Sep 28, 2026
20	Fluid ADS	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Fluid Ads are specialists in Location Based Marketing.” Source: RevenueBase Database · checked Sep 28, 2026
21	Amplify Media Sales	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
22	Magnetise Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “The Magnetise Group delivers performance advertising and lead generation services for publishers, consumer brands, advertisers and agencies.” Source: RevenueBase Database · checked Sep 28, 2026
23	Inyourarea	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	4 contacts →
	Strong evidence “Discover local news and information near you with InYourArea, the UK's leading local news, information and community platform.” Source: RevenueBase Database · checked Sep 28, 2026
24	Norsu Media Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	4 contacts →
	Indirect evidence “Norsu Media Group is a global media company that specialises in growing our clients' online presence, increasing customer bases, and boosting profits through services from our…” Source: RevenueBase Database · checked Sep 28, 2026
25	Adnet Marketing Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Looking for billboard advertising that actually works?” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: local advertising platforms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names local advertising platforms.
Partial evidence: Its own public description names part of local advertising platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name local advertising platforms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 137 local advertising platforms based in London, United Kingdom

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Local advertising platforms based in London, United Kingdom at a glance

As of Sep 28, 2026

26.2%Verified-email coverage

6.8Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 137 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 local advertising platforms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “local advertising platforms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names local advertising platforms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among local advertising platforms, 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 its RevenueBase Smart Search 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, 242 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 28, 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

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names local advertising platforms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many local advertising platforms are there based in London, United Kingdom?

RevenueBase identified 137 local advertising platforms 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?

OCM Digital Media, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most local advertising platforms?

London leads the United Kingdom with 137 headquartered companies, followed by Manchester (15) and Birmingham (11).

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 242 verified decision-maker contacts tracked across these 137 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 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 Smart Search, 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.