Company lists · Data refreshed September 2026

Top 25 Streaming media advertising agencies based in the United Kingdom

Name: Streaming media 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 21, 2026 353 companies tracked

RevenueBase identified 353 streaming media advertising agencies headquartered in the United Kingdom as of September 2026 and tracks 2,864 professional contacts across them, including 844 with verified work emails. London is the largest hub.

This list covers streaming media advertising 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 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 21, 2026 86% judged on-target in blind review

353Companies

2,864Contacts tracked

844Verified emails

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The 25 largest streaming media advertising agencies based in the United Kingdom

Ranked by team size

Top 25 of 353 streaming media advertising agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to streaming media advertising agencies: 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	VIDSY	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	192 contacts →
	Indirect evidence “Vidsy helps global brands achieve business goals with effective video ads, created efficiently and consistently for digital.” Source: RevenueBase Database · checked Sep 21, 2026
2	ONE Agency Media	Indirect evidence	Manchester, United KingdomHQ checked Sep 21, 2026	11-50	75 contacts →
	Indirect evidence “One Agency: Creating, Delivering and Connecting brands.” Source: RevenueBase Database · checked Sep 21, 2026
3	AMA	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	59 contacts →
	Indirect evidence “AMA is the leader in Dynamic Creative for audio.” Source: RevenueBase Database · checked Sep 21, 2026
4	OCM Digital Media	Partial evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
5	DAX	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	51 contacts →
	Partial 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 21, 2026
6	Media Agency Group	Strong evidence	Salford, United KingdomHQ checked Sep 21, 2026	51-200	48 contacts →
	Strong evidence “Media Agency Group is an advertising agency specialising in the purchasing and planning of all media formats across the spectrum of advertising.” Source: RevenueBase Database · checked Sep 21, 2026
7	Universal Television & Media LTD	Strong evidence	Luton, United KingdomHQ checked Sep 21, 2026	51-200	48 contacts →
	Strong evidence “TV ADVERTISING, TV COMMERCIALS, VIDEO & CONTENT PRODUCTION, ADVERTISING, SOCIAL MEDIA MARKETING AND BRAND CONSULTING FOR THE MOST AMBITIOUS BRANDS, BUSINESSES AND STARTUPS ON THE…” Source: RevenueBase Database · checked Sep 21, 2026
8	Astus Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	47 contacts →
	Indirect evidence “We speak to Marketing Directors across all sectors all the time and we understand their challenges and board demands: Get More ROI.” Source: RevenueBase Database · checked Sep 21, 2026
9	BAMBU	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	n/a	45 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 21, 2026
10	Yospace	Indirect evidence	Staines-upon-thames, United KingdomHQ checked Sep 21, 2026	51-200	43 contacts →
	Indirect evidence “Yospace has been at the forefront of the digital video revolution for 25 years.” Source: RevenueBase Database · checked Sep 21, 2026
11	Unruly	Indirect evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
12	Adserve	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	38 contacts →
	Partial evidence “We're an ad-tech company, serving the £23bn global market for audio advertising with software-as-a-service solutions for revenue optimisation, planning and scheduling.” Source: RevenueBase Database · checked Sep 21, 2026
13	Publisher Collective	Indirect evidence	Bath, United KingdomHQ checked Sep 21, 2026	51-200	36 contacts →
	Indirect evidence “We connect brands to audiences and publishers to revenue.” Source: RevenueBase Database · checked Sep 21, 2026
14	Happy Hour Productions	Partial evidence	Bristol, United KingdomHQ checked Sep 21, 2026	11-50	29 contacts →
	Partial evidence “Happy Hour is an award-winning TV & Video advertising agency for brands that don’t stand still.” Source: RevenueBase Database · checked Sep 21, 2026
15	Rocketer	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	27 contacts →
	Indirect evidence “Rocketer are a multi platform Martech advertiser specialising prominently in the financial services vertical servicing clients on a global scale.” Source: RevenueBase Database · checked Sep 21, 2026
16	Groovy Gecko	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	26 contacts →
	Partial evidence “We are live video streaming experts and Facebook official partners.” Source: RevenueBase Database · checked Sep 21, 2026
17	Radio Experts	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	24 contacts →
	Partial evidence “We are leading experts in planning, booking and buying radio advertising on all analogue, digital and On Demand platforms.” Source: RevenueBase Database · checked Sep 21, 2026
18	Encore Digital Media	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “Do justice to the data, with the expertise to turn it into a nuanced programmatic campaign.” Source: RevenueBase Database · checked Sep 21, 2026
19	JWE Media	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	23 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 21, 2026
20	Naritive	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	23 contacts →
	Partial evidence “Naritive is a media owner dedicated to offering brands and companies better optimised and effective programmatic and display ad solutions.” Source: RevenueBase Database · checked Sep 21, 2026
21	Broadlab	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	22 contacts →
	Partial evidence “Broadlab provides a single point of access to the whole of the Addressable TV advertising landscape for agencies and their clients.” Source: RevenueBase Database · checked Sep 21, 2026
22	Propel Digital	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	21 contacts →
	Partial evidence “At Propel Digital, we redefine what it means to be a true partner in paid media.” Source: RevenueBase Database · checked Sep 21, 2026
23	Guerillascope	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	21 contacts →
	Partial evidence “Guerillascope is a full-service media agency, with serious chops across AV, out-of-home, publishers, digital, and partnerships.” Source: RevenueBase Database · checked Sep 21, 2026
24	Mostly Media	Partial evidence	Bath, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “Mostly Media is an independent media buying agency based in Bath.” Source: RevenueBase Database · checked Sep 21, 2026
25	Hoopla Digital LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 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 21, 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: streaming media advertising agencies. 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 streaming media advertising agencies.
Partial evidence: Its own public description names part of streaming media advertising agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name streaming media advertising agencies. 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 353 streaming media advertising agencies based in the United Kingdom

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Streaming media advertising agencies based in the United Kingdom at a glance

As of Sep 21, 2026

29.5%Verified-email coverage

8.1Average contacts per company

1-10Median size (employees)

45.9%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

230

11-50

51-200

201-500

501-1,000

1,001-5,000

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 353 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 streaming media advertising agencies, 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 the United Kingdom whose own description of what they do matches “streaming media advertising agencies”. 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 streaming media advertising agencies), 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 streaming media advertising 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 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, 844 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 21, 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.

Streaming media advertising agencies by metro

Streaming media advertising agencies in London162

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 streaming media advertising agencies, 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 streaming media advertising agencies are there based in the United Kingdom?

RevenueBase identified 353 streaming media advertising agencies headquartered in the 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?

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

Which city has the most streaming media advertising agencies?

London leads with 162 headquartered companies, followed by Manchester (15) and Birmingham (9).

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 844 verified decision-maker contacts tracked across these 353 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 21, 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.