Company lists · Data refreshed September 2026

Top 25 Online ads companies based in the United States

Name: Online ads companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 7,455 companies tracked

RevenueBase identified 7,455 online ads companies headquartered in the United States as of September 2026 and tracks 87,751 professional contacts across them, including 30,014 with verified work emails. New York is the largest hub.

This list covers online ads companies headquartered in the United States, 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.

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

7,455Companies

87,751Contacts tracked

30,014Verified emails

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The 25 largest online ads companies based in the United States

Ranked by team size

Top 25 of 7,455 online ads companies based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to online ads 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	HIBU	Indirect evidence	Cedar Rapids, IA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,426 contacts →
	Indirect evidence “Hibu is a leading provider of technology-driven, integrated digital marketing solutions for America’s local businesses, trusted by tens of thousands of local business owners.” Source: RevenueBase Database · checked Sep 21, 2026
2	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
3	Taboola	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,979 contacts →
	Indirect 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
4	TEADS	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,789 contacts →
	Indirect 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
5	Pubmatic	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 21, 2026	501-1,000	1,297 contacts →
	Indirect evidence “PubMatic is the leading AI-powered ad tech company delivering digital advertising performance.” Source: RevenueBase Database · checked Sep 21, 2026
6	Centerfield	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,063 contacts →
	Indirect evidence “Super-powered customer acquisition.” Source: RevenueBase Database · checked Sep 21, 2026
7	Mediaocean	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,050 contacts →
	Indirect 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
8	XR Extreme Reach	Indirect evidence	Hudson Yards, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	940 contacts →
	Indirect evidence “XR Extreme Reach is the leading platform for managing advertising operations.” Source: RevenueBase Database · checked Sep 21, 2026
9	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
10	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
11	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
12	simpli.fi	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 21, 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 21, 2026
13	Nexxen	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	673 contacts →
	Indirect evidence “Nexxen is the advertising platform that delivers full-funnel performance powered by unique data and media.” 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	MGID	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	501-1,000	568 contacts →
	Indirect evidence “MGID is a global advertising platform helping brands and publishers succeed on the open web with performance-driven, AI-powered native solutions.” Source: RevenueBase Database · checked Sep 21, 2026
16	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
17	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
18	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
19	VERVE	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	436 contacts →
	Indirect 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
20	Viant Technology	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	201-500	418 contacts →
	Indirect 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
21	Triplelift	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	402 contacts →
	Indirect evidence “TripleLift is the Creative SSP that transforms digital advertising through creative technology and innovative ad formats.” Source: RevenueBase Database · checked Sep 21, 2026
22	Unified	Indirect evidence	NY, United StatesHQ checked Sep 21, 2026	201-500	399 contacts →
	Indirect evidence “A best in class team of digital experts leveraging purpose built technology to deliver operational excellence and insights across paid social, programmatic, OTT and digital audio.” Source: RevenueBase Database · checked Sep 21, 2026
23	Viamedia	Indirect evidence	Lexington, KY, United StatesHQ checked Sep 21, 2026	201-500	390 contacts →
	Indirect evidence “Viamedia.ai is the nation’s leading independent provider of omnichannel advertising solutions, delivering precision and performance across linear TV, streaming, and digital…” Source: RevenueBase Database · checked Sep 21, 2026
24	Localedge	Partial evidence	Buffalo, NY, United StatesHQ checked Sep 21, 2026	501-1,000	383 contacts →
	Partial evidence “LocalEdge, a Hearst Media Services Company, offers a full suite of online advertising products and services for any size business and budget across the country.” Source: RevenueBase Database · checked Sep 21, 2026
25	Deltax	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	357 contacts →
	Indirect evidence “DeltaX is an enterprise-grade full-stack cross-channel advertising solution.” 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 ads 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 ads companies.
Partial evidence: Its own public description names part of online ads companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name online ads 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 7,455 online ads companies based in the United States

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Online ads companies based in the United States at a glance

As of Sep 21, 2026

34.2%Verified-email coverage

11.8Average contacts per company

1-10Median size (employees)

6.3%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

4,761

11-50

2,063

51-200

456

201-500

106

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 7,455 companies.

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 ads 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “online ads 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 ads 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 ads companies, and records with no verified work email. Companies headquartered outside United States 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 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, 30,014 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 ads companies by metro

Online ads companies in New York468
Online ads companies in Los Angeles257
Online ads companies in Miami228
Online ads companies in San Francisco140
Online ads companies in Austin133
Online ads companies in Chicago120
Online ads companies in Atlanta119
Online ads companies in Houston119
Online ads companies in Sheridan107
Online ads companies in Dallas105
Online ads companies in Las Vegas93
Online ads companies in San Diego93
Online ads companies in Denver88
Online ads companies in Tampa75
Online ads companies in Seattle73
Online ads companies in Orlando68
Online ads companies in Phoenix61
Online ads companies in Portland53
Online ads companies in Boston52
Online ads companies in Charlotte49
Online ads companies in Philadelphia48
Online ads companies in Scottsdale48
Online ads companies in Irvine46
Online ads companies in Wilmington45
Online ads companies in New York City41
Online ads companies in San Antonio40
Online ads companies in Minneapolis38
Online ads companies in Boca Raton37
Online ads companies in Fort Lauderdale36
Online ads companies in Washington36
Online ads companies in Santa Monica33
Online ads companies in Columbus32
Online ads companies in Cleveland30
Online ads companies in Nashville30
Online ads companies in San Jose30
Online ads companies in Pittsburgh28
Online ads companies in Raleigh28
Online ads companies in Salt Lake City28
Online ads companies in Jacksonville26
Online ads companies in Newark26

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 ads 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 ads companies are there based in the United States?

RevenueBase identified 7,455 online ads companies headquartered in the United States 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?

HIBU, headquartered in Cedar Rapids, tops this list with the largest team on record.

Which city has the most online ads companies?

New York leads with 468 headquartered companies, followed by Los Angeles (257) and Miami (228).

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 30,014 verified decision-maker contacts tracked across these 7,455 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.

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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 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.