Company lists · Data refreshed September 2026

Top 25 Ad tech agencies worldwide

Name: Ad tech agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 15,025 companies tracked

RevenueBase identified 15,025 company matches for ad tech agencies worldwide as of September 2026 and tracks 222,395 professional contacts across them, including 69,537 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for ad tech agencies worldwide, 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 19, 2026. Country and city lists for ad tech agencies follow the table.

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 19, 2026 How this list was built

15,025Companies

222,395Contacts tracked

69,537Verified emails

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The 25 largest ad tech agencies worldwide

Ranked by team size

Top 25 of 15,025 company matches for ad tech agencies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Publicis Media	Exact match	London, United KingdomHQ recorded Sep 19, 2026	10001+	6,901 contacts →
	Exact match “Publicis Media harnesses the power of modern media through leading agency brands Dysrupt, Infinite Roar, Publicis Collective, Publicis Health Media, Spark Foundry, Starcom and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	The Trade Desk	Exact match	Ventura, CA, United StatesHQ recorded Sep 19, 2026	1,001-5,000	4,307 contacts →
	Exact match “It's more than just clicks.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	PHD	Exact match	Bankside, GermanyHQ recorded Sep 19, 2026	1,001-5,000	4,068 contacts →
	Exact match “Welcome to PHD.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	OTHER	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	n/a	2,671 contacts →
	Exact match “Other.™ is a modern integrated media agency built for marketers who need more from their agency partner.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	CARAT	Exact match	London, United KingdomHQ recorded Sep 19, 2026	5,001-10,000	2,182 contacts →
	Exact match “Carat is the world’s first media agency and is privileged to work with some of today’s most storied and innovative brands.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	media.net	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 19, 2026	1,001-5,000	2,011 contacts →
	Exact match “Media.net is an independent advertising technology platform that helps publishers, advertisers, and agencies achieve measurable outcomes across all formats and mediums.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Taboola	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,979 contacts →
	Exact match “Taboola empowers businesses to grow through performance advertising technology that goes beyond search and social and delivers measurable outcomes at scale.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	TEADS	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,789 contacts →
	Exact match “Teads Holding Co.(“Teads”)(Nasdaq: TEAD) is a leading omnichannel advertising platform focused on driving outcomes for brand and performance advertisers across screens.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Stackadapt	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	1,001-5,000	1,633 contacts →
	Exact match “StackAdapt is the leading technology company that empowers marketers to reach, engage, and convert audiences with precision.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Doubleverify	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	501-1,000	1,318 contacts →
	Exact match “DoubleVerify is a leading software platform for digital media measurement and analytics.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Pubmatic	Exact match	Redwood City, CA, United StatesHQ recorded Sep 19, 2026	501-1,000	1,297 contacts →
	Exact match “PubMatic is the leading AI-powered ad tech company delivering digital advertising performance.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Freewheel	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,273 contacts →
	Exact match “FreeWheel’s TV and video advertising technology is built for today’s ever-evolving multiscreen ecosystem.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Mediaocean	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	1,050 contacts →
	Exact match “Mediaocean is powering the future of the advertising ecosystem with technology that empowers brands and agencies to deliver impactful omnichannel marketing experiences.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Integral AD Science	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	501-1,000	966 contacts →
	Exact match “Integral Ad Science is a leading global media measurement and optimization platform that delivers the industry’s most actionable data to drive superior results for the world’s…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	XR Extreme Reach	Exact match	Hudson Yards, NY, United StatesHQ recorded Sep 19, 2026	1,001-5,000	940 contacts →
	Exact match “XR Extreme Reach is the leading platform for managing advertising operations.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Magnite	Exact match	United StatesHQ recorded Sep 19, 2026	501-1,000	910 contacts →
	Exact match “We’re Magnite (NASDAQ: MGNI), the world’s largest independent sell-side advertising company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Logical Position	Exact match	Lake Oswego, OR, United StatesHQ recorded Sep 19, 2026	501-1,000	899 contacts →
	Exact match “Logical Position (LP) is an Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Moloco	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 19, 2026	501-1,000	893 contacts →
	Exact match “Moloco’s mission is to be the scaling engine for the internet economy, applying AI to help businesses of all sizes grow.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	BASIS	Exact match	Chicago, IL, United StatesHQ recorded Sep 19, 2026	501-1,000	891 contacts →
	Exact match “Basis is a global provider of media automation and programmatic advertising software and services for enterprises.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Adform	Exact match	Copenhagen, DenmarkHQ recorded Sep 19, 2026	501-1,000	847 contacts →
	Exact match “Adform is the most powerful and safe media buying platform in the world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	KARGO	Exact match	New York, NY, United StatesHQ recorded Sep 19, 2026	201-500	843 contacts →
	Exact match “Kargo creates memorable experiences for advertisers that go beyond the first impression to captivate consumer attention.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Smartly	Exact match	Helsinki, FinlandHQ recorded Sep 19, 2026	501-1,000	827 contacts →
	Exact match “Smartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Mediaplus Group	Exact match	Munich, GermanyHQ recorded Sep 19, 2026	1,001-5,000	820 contacts →
	Exact match “Mediaplus is one of Europe’s largest independent, partner-owned media agencies.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Azerion	Exact match	Schiphol-rijk, GermanyHQ recorded Sep 19, 2026	1,001-5,000	808 contacts →
	Exact match “Founded in 2014, Azerion (EURONEXT: AZRN) is one of Europe’s largest digital advertising and entertainment media platforms.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Tradedoubler	Exact match	Stockholm, SwedenHQ recorded Sep 19, 2026	201-500	770 contacts →
	Exact match “We empower a thriving partner network where everyone wins.” Recorded in the RevenueBase company graph · Sep 19, 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 “ad tech 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 15,025 ad tech agencies worldwide

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Ad tech agencies worldwide at a glance

As of Sep 19, 2026

31.3%Verified-email coverage

14.8Average contacts per company

1-10Median size (employees)

2.9%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

7,641

11-50

5,441

51-200

1,411

201-500

333

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for ad tech agencies are linked below.
What qualifies: Company records worldwide whose business descriptions match “ad tech 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. 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 69,537 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 19, 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.

Ad tech agencies by location

103 lists · largest first

Every Ad tech agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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

How many ad tech agencies are there worldwide?

RevenueBase identified 15,025 company matches for ad tech agencies worldwide 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?

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

Which country has the most ad tech agencies?

The United States leads with 3,005 companies, followed by India (1,262) and the United Kingdom (699). Every ad tech agencies list by country and city is linked on this page.

Which city has the most ad tech agencies?

London leads with 441 company records, followed by New York (406) and Singapore (191).

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 69,537 professional contacts with verified work emails tracked across these 15,025 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 19, 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.