Company lists · Data refreshed September 2026

Top 24 In-stream video ad platforms based in London, United Kingdom

RevenueBase identified 51 company matches for in-stream video ad platforms associated with London, United Kingdom as of September 2026 and tracks 782 professional contacts across them, including 298 with verified work emails and 88 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for in-stream video ad platforms associated with London, 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 12, 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 12, 2026 How this list was built
51Companies
782Contacts tracked
298Verified emails
88Mobile numbers
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The 24 largest in-stream video ad platforms based in London, United Kingdom

Ranked by team size
Top 24 of 51 company matches for in-stream video ad platforms based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 12, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 12, 202651-200192 contacts →

Exact match

“Vidsy helps global brands achieve business goals with effective video ads, created efficiently and consistently for digital.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 12, 202651-200107 contacts →

Exact match

“Venatus Media is the advertising growth engine where premium games, sports, and entertainment content thrive, and brands meet audiences In the Zone.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 12, 2026201-50099 contacts →

Exact match

“Admixer is an independent adtech company that develops an ecosystem of full-stack programmatic solutions.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-5049 contacts →

Exact match

“Precise TV is an award-winning HIPAA and COPPA certified contextual video advertising platform offering advanced machine-learning optimization and contextual targeting helping you…”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 12, 2026501-1,00039 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-5018 contacts →

Exact match

“Hoopla are an independent start-up online advertising network, specialising in online video, display, mobile and branded advertising solutions.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-5014 contacts →

Exact match

“Welcome to bidinfluence, your premier supply-side platform specializing in the dynamic monetization of mobile applications through top-notch programmatic video ads.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-5013 contacts →

Exact match

“Pixels AI uses innovative tech to amplify the potential of video on the Open Web.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-5012 contacts →

Exact match

“Smartzer is a SaaS platform used by brands to make live streams and videos interactive and shoppable to drive sales and capture detailed analytics directly from their videos.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-5011 contacts →

Exact match

“We connect brands with communities across the CTV marketplace.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-109 contacts →

Exact match

“As Smatch, We help brands reach brand new audiences on mobile games, streamers, blended networks and audio platforms.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-508 contacts →

Exact match

“LightBox TV is the first independent management solution for marketers and media buyers running addressable TV advertising campaigns in connected TV environments.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-508 contacts →

Exact match

“The vision of this organization is to continuously innovate and improve the field of digital advertising by focusing on the research and development of tools used to optimize the…”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-508 contacts →

Exact match

“Programmatic was built to make media smarter.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-106 contacts →

Exact match

“United4digital is a global marketing company specializing in video and audio advertising solutions.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-106 contacts →

Exact match

“From the beginning, Open Horizons Media has been a programmatic advertising company dedicated to achieving digital advertising success for businesses of all sizes!”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-106 contacts →

Exact match

“We Make Your Creativity Move Faster & Reach Further Uncover valuable insights for your video Ads with AI and continuously refine your ad campaigns & brand positioning- Insights &…”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-505 contacts →

Exact match

“Octave Audio is live!”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 12, 202611-505 contacts →

Exact match

“Bedrock Platform helps brings forward your competitive advantage with a next generation media buying platform that unifies curated quality and intelligence with high impact Video…”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-105 contacts →

Exact match

“Videolity helps businesses to monetise their videos by auto-tagging and making them one-click shoppable.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-103 contacts →

Exact match

“The Vidium Video Intelligence platform is powered by deterministic video execution signals to help brands deliver the best viewing experiences for their ads across OLV and CTV.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-102 contacts →

Exact match

“Adnuro is an online advertising company with access to over 10bn GEO targeted ads per month, working with premium publishers and advertisers, delivering highly relevant, targeted…”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-102 contacts →

Exact match

“CONJRE makes creative video assets, assembled in real time at point of delivery, in response to data, for maximum relevance & effectiveness for advertisers on social, retail &…”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 12, 20261-102 contacts →

Exact match

“Inadvia is the world’s first technology platform built specifically for the programmatic trading of In-Transit video advertising.”

Recorded in the RevenueBase company graph · Sep 12, 2026 · View company records in RevenueBase

Showing 24 of 51 in-stream video ad platforms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 298 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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In-stream video ad platforms based in London, United Kingdom at a glance

As of Sep 12, 2026
38.1%Verified-email coverage
11.3%Mobile-number coverage
15.3Average contacts per company
11-50Median size (employees)
Sep 12, 2026Page data refreshed

Companies by employee count

1-10
19
11-50
24
51-200
5
201-500
1
501-1,000
1
1,001-5,000
1

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

Company record updated

Median 62.5d

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 London, United Kingdom whose business descriptions match “in-stream video ad platforms” 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 298 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 12, 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.

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 “in-stream video ad platforms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many in-stream video ad platforms are there based in London, United Kingdom?

RevenueBase identified 51 company matches for in-stream video ad platforms associated with London, 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?

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

Which city in the United Kingdom has the most in-stream video ad platforms?

London leads the United Kingdom with 50 company records, followed by Manchester (3) and Bristol (2).

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 298 professional contacts with verified work emails tracked across these 51 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 12, 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.