Company lists · Data refreshed September 2026
Top 25 Over the top advertising agencies based in the United Kingdom
RevenueBase identified 150 over the top advertising agencies headquartered in the United Kingdom as of September 2026 and tracks 1,517 professional contacts across them, including 418 with verified work emails and 121 with mobile numbers. London is the largest hub.
This list covers over the top 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, 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.
The 25 largest over the top advertising agencies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 192 | ||||
“Vidsy helps global brands achieve business goals with effective video ads, created efficiently and consistently for digital.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 75 | ||||
“One Agency: Creating, Delivering and Connecting brands.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 48 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | Grand VisualIndirect evidence | 35 | |||
“Grand Visual is a unique creative OOH studio.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 35 | ||||
“We harness the power of a trusted network that reaches billions, ensuring your message resonates far and wide.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 33 | ||||
“With over 30 years experience, DS.Emotion help define and create compelling brands & highly effective marketing campaigns, which are delivered through strategically selected media…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 29 | ||||
“Happy Hour is an award-winning TV & Video advertising agency for brands that don’t stand still.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 26 | ||||
“We’re a passionate team of media buyers, copywriters, strategists, animators, designers, analysts, techies & more.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 25 | ||||
“At Running Total, we strive to be the best independent full-service media agency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 25 | ||||
“From billion-dollar art auctions to world-record breaking feats of human endeavour, Chrome is a branded entertainment studio making films, live-streams, and immersive experiences…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 21 | ||||
“Guerillascope is a full-service media agency, with serious chops across AV, out-of-home, publishers, digital, and partnerships.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 18 | ||||
“Ekstasy, founded in 2007, is a multi award winning Creative Advertising Agency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 16 | ||||
“Audience2Media is an Advertising Technology based company with offices in the UK and Asia, delivering data driven campaigns across all media channels, applying an innovative…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 15 | ||||
“CMe Media Ltd is an advertising and marketing agency with a significant level of experience within the UK media industry.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 11 | ||||
“We are an award-winning advertising agency working with a wide range of clients, from local and regional businesses to national brands.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 11 | ||||
“Be The Fox is an award-winning, audience-obsessed creative and production agency delivering end-to-end video-first content for ads, social and brand campaigns.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 11 | ||||
“We are the new media experts.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 10 | ||||
“Excite OOH is a specialised outdoor advertising agency covering all aspects of media planning, buying, creative, reporting, strategy, etc.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 10 | ||||
“Video Production Agency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 | ||||
“With an agile, bespoke approach for each client, we bring media planning strategies beyond the obvious and sharp buying skills to answer your marketing and advertising briefs.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 9 | ||||
“At TBP Media, we don’t do small.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | Shooting ReelsIndirect evidence | 9 | |||
“Shooting Reels aligns great creative with performance.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | Crate Media GroupIndirect evidence | 8 | |||
“We specialise in Display, Social, Native, Video, Search, Programmatic TV, Digital Radio & Digital Out of Home, alongside Creative services, seamlessly unifying cross-channel…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | DevicefulIndirect evidence | 8 | |||
“Deviceful are digital ad creative specialists.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 150 over the top advertising agencies based in the United Kingdom
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Over the top advertising agencies based in the United Kingdom at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 over the top 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 the United Kingdom whose own description of what they do matches “over the top 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 over the top 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 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, 418 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.
Over the top advertising agencies by metro
- Over the top advertising agencies in London57
Frequently asked
How many over the top advertising agencies are there based in the United Kingdom?
RevenueBase identified 150 over the top 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 over the top advertising agencies?
London leads with 57 headquartered companies, followed by Manchester (10) and Birmingham (5).
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 418 verified decision-maker contacts tracked across these 150 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.
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