Company lists · Data refreshed September 2026

Top 25 Advertising technology vendors worldwide

Name: Advertising technology vendors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 8,431 companies tracked

RevenueBase identified 8,431 advertising technology vendors worldwide as of September 2026 and tracks 163,122 professional contacts across them, including 55,583 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers advertising technology vendors worldwide, 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 19, 2026. Country and city lists for advertising technology vendors follow the table.

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 19, 2026 86% judged on-target in blind review

8,431Companies

163,122Contacts tracked

55,583Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest advertising technology vendors worldwide

Ranked by team size

Top 25 of 8,431 advertising technology vendors worldwide, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to advertising technology vendors: 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	Epsilon	Indirect evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	5,001-10,000	9,953 contacts →
	Indirect evidence “Epsilon is a global leader in data and identity with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services.” Source: RevenueBase Database · checked Sep 19, 2026
2	Publicis Media	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	6,901 contacts →
	Indirect evidence “Publicis Media harnesses the power of modern media through leading agency brands Dysrupt, Infinite Roar, Publicis Collective, Publicis Health Media, Spark Foundry, Starcom and…” Source: RevenueBase Database · checked Sep 19, 2026
3	The Trade Desk	Indirect evidence	Ventura, CA, United StatesHQ checked Sep 19, 2026	1,001-5,000	4,307 contacts →
	Indirect evidence “It's more than just clicks.” Source: RevenueBase Database · checked Sep 19, 2026
4	PHD	Indirect evidence	Bankside, GermanyHQ checked Sep 19, 2026	1,001-5,000	4,068 contacts →
	Indirect evidence “Welcome to PHD.” Source: RevenueBase Database · checked Sep 19, 2026
5	media.net	Strong evidence	Dubai, United Arab EmiratesHQ checked Sep 19, 2026	1,001-5,000	2,011 contacts →
	Strong evidence “Media.net is an independent advertising technology platform that helps publishers, advertisers, and agencies achieve measurable outcomes across all formats and mediums.” Source: RevenueBase Database · checked Sep 19, 2026
6	Taboola	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,979 contacts →
	Strong evidence “Taboola empowers businesses to grow through performance advertising technology that goes beyond search and social and delivers measurable outcomes at scale.” Source: RevenueBase Database · checked Sep 19, 2026
7	TEADS	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,789 contacts →
	Partial evidence “Teads Holding Co.(“Teads”)(Nasdaq: TEAD) is a leading omnichannel advertising platform focused on driving outcomes for brand and performance advertisers across screens.” Source: RevenueBase Database · checked Sep 19, 2026
8	Stackadapt	Partial evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	1,001-5,000	1,633 contacts →
	Partial evidence “StackAdapt is the leading technology company that empowers marketers to reach, engage, and convert audiences with precision.” Source: RevenueBase Database · checked Sep 19, 2026
9	Pubmatic	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 19, 2026	501-1,000	1,297 contacts →
	Partial evidence “PubMatic is the leading AI-powered ad tech company delivering digital advertising performance.” Source: RevenueBase Database · checked Sep 19, 2026
10	Freewheel	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,273 contacts →
	Strong evidence “FreeWheel’s TV and video advertising technology is built for today’s ever-evolving multiscreen ecosystem.” Source: RevenueBase Database · checked Sep 19, 2026
11	Mediaocean	Strong evidence	New York, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,050 contacts →
	Strong evidence “Mediaocean is powering the future of the advertising ecosystem with technology that empowers brands and agencies to deliver impactful omnichannel marketing experiences.” Source: RevenueBase Database · checked Sep 19, 2026
12	Samsung ADS	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	985 contacts →
	Partial evidence “Samsung Ads is Samsung Electronics’ advertising ecosystem, spanning hundreds of millions of smart devices across TV, mobile, desktop, and beyond.” Source: RevenueBase Database · checked Sep 19, 2026
13	Magnite	Partial evidence	United StatesHQ checked Sep 19, 2026	501-1,000	910 contacts →
	Partial evidence “We’re Magnite (NASDAQ: MGNI), the world’s largest independent sell-side advertising company.” Source: RevenueBase Database · checked Sep 19, 2026
14	Moloco	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 19, 2026	501-1,000	893 contacts →
	Indirect evidence “Moloco’s mission is to be the scaling engine for the internet economy, applying AI to help businesses of all sizes grow.” Source: RevenueBase Database · checked Sep 19, 2026
15	BASIS	Partial evidence	Chicago, IL, United StatesHQ checked Sep 19, 2026	501-1,000	891 contacts →
	Partial evidence “Basis is a global provider of media automation and programmatic advertising software and services for enterprises.” Source: RevenueBase Database · checked Sep 19, 2026
16	Adform	Indirect evidence	Copenhagen, DenmarkHQ checked Sep 19, 2026	501-1,000	847 contacts →
	Indirect evidence “Adform is the most powerful and safe media buying platform in the world.” Source: RevenueBase Database · checked Sep 19, 2026
17	KARGO	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	843 contacts →
	Indirect evidence “Kargo creates memorable experiences for advertisers that go beyond the first impression to captivate consumer attention.” Source: RevenueBase Database · checked Sep 19, 2026
18	Smartly	Strong evidence	Helsinki, FinlandHQ checked Sep 19, 2026	501-1,000	827 contacts →
	Strong evidence “Smartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers.” Source: RevenueBase Database · checked Sep 19, 2026
19	Azerion	Partial evidence	Schiphol-rijk, GermanyHQ checked Sep 19, 2026	1,001-5,000	808 contacts →
	Partial evidence “Founded in 2014, Azerion (EURONEXT: AZRN) is one of Europe’s largest digital advertising and entertainment media platforms.” Source: RevenueBase Database · checked Sep 19, 2026
20	MNTN	Partial evidence	Austin (remote), TX, United StatesHQ checked Sep 19, 2026	201-500	707 contacts →
	Partial evidence “MNTN builds advertising software for brands to drive measurable conversions, revenue, site visits and more through the power of television.” Source: RevenueBase Database · checked Sep 19, 2026
21	Equativ	Indirect evidence	Paris, FranceHQ checked Sep 19, 2026	501-1,000	705 contacts →
	Indirect evidence “Equativ is a leading independent media platform that empowers advertisers and publishers to achieve real outcomes across the entire digital ecosystem.” Source: RevenueBase Database · checked Sep 19, 2026
22	Channel Factory	Partial evidence	City Of Industry, CA, United StatesHQ checked Sep 19, 2026	501-1,000	702 contacts →
	Partial evidence “Channel Factory is a global technology and data platform that maximizes both performance efficiency and contextual suitability, delivering contextual performance for advertisers…” Source: RevenueBase Database · checked Sep 19, 2026
23	simpli.fi	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 19, 2026	501-1,000	680 contacts →
	Indirect evidence “Simpli.fi is a real-world media platform that connects digital intent with physical movement, helping brands reach audiences in the right place, at the right moment, to drive…” Source: RevenueBase Database · checked Sep 19, 2026
24	Nexxen	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	501-1,000	673 contacts →
	Partial evidence “Nexxen is the advertising platform that delivers full-funnel performance powered by unique data and media.” Source: RevenueBase Database · checked Sep 19, 2026
25	Index Exchange	Partial evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	501-1,000	671 contacts →
	Partial evidence “Index Exchange is a global advertising supply-side platform enabling media owners to maximize the value of their content on any screen.” Source: RevenueBase Database · checked Sep 19, 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: advertising technology vendors. 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 advertising technology vendors.
Partial evidence: Its own public description names part of advertising technology vendors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name advertising technology vendors. 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 8,431 advertising technology vendors worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 55,583 reachable decision-makers.

Free signup · no credit card

View the full list →

Advertising technology vendors worldwide at a glance

As of Sep 19, 2026

34.1%Verified-email coverage

19.3Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

3,712

11-50

3,312

51-200

995

201-500

258

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among advertising technology vendors, 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.
Coverage: Every country. Country and city lists for advertising technology vendors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “advertising technology vendors”. 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 advertising technology vendors), 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 advertising technology vendors, and records with no verified work email.
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, 55,583 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 19, 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.

Advertising technology vendors by location

53 lists · largest first

Every Advertising technology vendors 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 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 advertising technology vendors, 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 advertising technology vendors are there worldwide?

RevenueBase identified 8,431 advertising technology vendors worldwide 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?

Epsilon, headquartered in Irving, tops this list with the largest team on record.

Which country has the most advertising technology vendors?

The United States leads with 1,794 companies, followed by India (757) and the United Kingdom (351). Every advertising technology vendors list by country and city is linked on this page.

Which city has the most advertising technology vendors?

New York leads with 319 headquartered companies, followed by London (249) and Singapore (149).

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 55,583 verified decision-maker contacts tracked across these 8,431 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 8,431 advertising technology vendors worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

Browse: Companies home · Lists by location · New lists

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.