Company lists · Data refreshed September 2026

Top 25 Online display advertising companies worldwide

Name: Online display advertising companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 24,529 companies tracked

RevenueBase identified 24,529 online display advertising companies worldwide as of September 2026 and tracks 185,861 professional contacts across them, including 47,694 with verified work emails. The United States is the largest market and London the largest hub.

This list covers online display advertising companies 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 21, 2026. Country and city lists for online display advertising companies 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 21, 2026 86% judged on-target in blind review

24,529Companies

185,861Contacts tracked

47,694Verified emails

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

The 25 largest online display advertising companies worldwide

Ranked by team size

Top 25 of 24,529 online display advertising companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to online display advertising companies: 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	The Trade Desk	Indirect evidence	Ventura, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,307 contacts →
	Indirect evidence “It's more than just clicks.” Source: RevenueBase Database · checked Sep 21, 2026
2	Taboola	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,979 contacts →
	Partial 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 21, 2026
3	TEADS	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
4	Pubmatic	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 21, 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 21, 2026
5	Mediaocean	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,050 contacts →
	Partial 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 21, 2026
6	Magnite	Partial evidence	United StatesHQ checked Sep 21, 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 21, 2026
7	Logical Position	Indirect evidence	Lake Oswego, OR, United StatesHQ checked Sep 21, 2026	501-1,000	899 contacts →
	Indirect evidence “Logical Position (LP) is an Inc.” Source: RevenueBase Database · checked Sep 21, 2026
8	NP Digital	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	866 contacts →
	Indirect evidence “Neil Patel has been recognized by the Wall Street Journal, Forbes, and the United Nations, to name a few, as one of the most influential and successful marketers and entrepreneurs…” Source: RevenueBase Database · checked Sep 21, 2026
9	Adform	Indirect evidence	Copenhagen, DenmarkHQ checked Sep 21, 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 21, 2026
10	KARGO	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
11	Smartly	Partial evidence	Helsinki, FinlandHQ checked Sep 21, 2026	501-1,000	827 contacts →
	Partial evidence “Smartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers.” Source: RevenueBase Database · checked Sep 21, 2026
12	Interactive Avenues	Indirect evidence	Mumbai, IndiaHQ checked Sep 21, 2026	501-1,000	802 contacts →
	Indirect evidence “Interactive Avenues is India’s leading full-service digital marketing company with offices in Mumbai (headquarters), Gurugram, Bengaluru, Chennai and Kolkata.” Source: RevenueBase Database · checked Sep 21, 2026
13	Equativ	Indirect evidence	Paris, FranceHQ checked Sep 21, 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 21, 2026
14	Innovid	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	640 contacts →
	Indirect evidence “Innovid is the leading independent ad tech platform, empowering marketers to create, deliver, measure, and optimize ad-supported experiences that people love.” Source: RevenueBase Database · checked Sep 21, 2026
15	Perion	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	501-1,000	621 contacts →
	Indirect evidence “Perion is helping agencies, brands and retailers get better results with their marketing investments by providing advanced technology across all major digital channels.” Source: RevenueBase Database · checked Sep 21, 2026
16	OGURY	Indirect evidence	London, FranceHQ checked Sep 21, 2026	501-1,000	595 contacts →
	Indirect evidence “Ogury is a global adtech company powered by Persona Intelligence, its proprietary technology that enables brands and agencies to activate consistent persona-based strategies…” Source: RevenueBase Database · checked Sep 21, 2026
17	Precis	Indirect evidence	Stockholm, SwedenHQ checked Sep 21, 2026	201-500	535 contacts →
	Indirect evidence “Precis is a modern, tech-powered digital marketing agency specialising in media buying, analytics, creative, and proprietary technology.” Source: RevenueBase Database · checked Sep 21, 2026
18	Tombras	Indirect evidence	Knoxville, TN, United StatesHQ checked Sep 21, 2026	201-500	496 contacts →
	Indirect evidence “Tombras is a 450+ person, full-service agency with a digital mindset.” Source: RevenueBase Database · checked Sep 21, 2026
19	Quantcast	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	491 contacts →
	Indirect evidence “Quantcast is the AI-powered ad platform built for performance marketers.” Source: RevenueBase Database · checked Sep 21, 2026
20	M C Saatchi Performance	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	457 contacts →
	Indirect evidence “We are a Global digital media agency specializing in taking a human approach to connecting brands with people across all channels.” Source: RevenueBase Database · checked Sep 21, 2026
21	Affinity Global	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	201-500	446 contacts →
	Indirect evidence “Affinity is a leading global AdTech company, empowering publishers to maximize revenue and enabling advertisers to reach their ideal audiences.” Source: RevenueBase Database · checked Sep 21, 2026
22	VERVE	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	436 contacts →
	Partial evidence “Verve is a global leading advertising technology company, connecting advertisers seeking to buy digital ad space with publishers monetizing their content.” Source: RevenueBase Database · checked Sep 21, 2026
23	Viant Technology	Partial evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	201-500	418 contacts →
	Partial evidence “Viant Technology Inc.(NASDAQ: DSP) is a leader in AI-powered programmatic advertising, dedicated to driving innovation in digital marketing.” Source: RevenueBase Database · checked Sep 21, 2026
24	BIG ADS	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	n/a	409 contacts →
	Indirect evidence “Big Ads has been providing digital ad-tech solutions for 3 years with great success thanks to the release of Buddy, an ad-tech platform which produces rich media creative tags to…” Source: RevenueBase Database · checked Sep 21, 2026
25	Triplelift	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	402 contacts →
	Partial evidence “TripleLift is the Creative SSP that transforms digital advertising through creative technology and innovative ad formats.” 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: online display advertising companies. 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 online display advertising companies.
Partial evidence: Its own public description names part of online display advertising companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name online display advertising companies. 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 24,529 online display advertising companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 47,694 reachable decision-makers.

Free signup · no credit card

View the full list →

Online display advertising companies worldwide at a glance

As of Sep 21, 2026

25.7%Verified-email coverage

7.6Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

16,045

11-50

6,757

51-200

1,257

201-500

287

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 online display advertising companies, 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 online display advertising companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “online display advertising companies”. 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 online display advertising companies), 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 online display advertising companies, 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, 47,694 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.

Online display advertising companies by location

106 lists · largest first

Every Online display advertising companies 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 online display advertising companies, 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 online display advertising companies are there worldwide?

RevenueBase identified 24,529 online display advertising companies 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?

The Trade Desk, headquartered in Ventura, tops this list with the largest team on record.

Which country has the most online display advertising companies?

The United States leads with 4,324 companies, followed by India (2,518) and Brazil (1,236). Every online display advertising companies list by country and city is linked on this page.

Which city has the most online display advertising companies?

London leads with 481 headquartered companies, followed by New York (314) and Sao Paulo (296).

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 47,694 verified decision-maker contacts tracked across these 24,529 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.

Ready to reach these companies? Verified emails and direct dials for all 24,529 online display advertising companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.