Company lists · Data refreshed September 2026

Top 25 Contextual advertising software companies based in the United States

Name: Contextual advertising software 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 27, 2026 500 companies tracked

RevenueBase identified 500 contextual advertising software companies headquartered in the United States as of September 2026 and tracks 14,520 professional contacts across them, including 6,487 with verified work emails. New York is the largest hub.

This list covers contextual advertising software 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 27, 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 27, 2026 86% judged on-target in blind review

500Companies

14,520Contacts tracked

6,487Verified emails

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The 25 largest contextual advertising software companies based in the United States

Ranked by team size

Top 25 of 500 contextual advertising software companies based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to contextual advertising software 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	TEADS	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 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 27, 2026
2	Pubmatic	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 27, 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 27, 2026
3	Mediaocean	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 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 27, 2026
4	Quantcast	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	501-1,000	491 contacts →
	Indirect evidence “Quantcast is the AI-powered ad platform built for performance marketers.” Source: RevenueBase Database · checked Sep 27, 2026
5	Branch	Indirect evidence	Mountain View, CA, United StatesHQ checked Sep 27, 2026	201-500	459 contacts →
	Indirect evidence “Branch is on a mission: to power impactful experiences in the connected world.” Source: RevenueBase Database · checked Sep 27, 2026
6	Affinity Global	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 27, 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 27, 2026
7	Viant Technology	Partial evidence	Irvine, CA, United StatesHQ checked Sep 27, 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 27, 2026
8	Triplelift	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 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 27, 2026
9	Databeat	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 27, 2026	201-500	357 contacts →
	Indirect evidence “At DataBeat, we redefine what's possible in AdTech, simplifying AdTech complexities into actionable strategies that drive revenue.” Source: RevenueBase Database · checked Sep 27, 2026
10	Admarketplace	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	232 contacts →
	Partial evidence “adMarketplace is the largest global marketplace for Native Search advertising.” Source: RevenueBase Database · checked Sep 27, 2026
11	3dot14	Indirect evidence	New York, United StatesHQ checked Sep 27, 2026	51-200	221 contacts →
	Indirect evidence “At 3.14, we create an impact on the ad-tech sphere quarter-mile at a time, through Machine learning, Artificial Intelligence and extensive re-targeting, acting as a wagon to…” Source: RevenueBase Database · checked Sep 27, 2026
12	EZOIC	Indirect evidence	Carlsbad, CA, United StatesHQ checked Sep 27, 2026	201-500	207 contacts →
	Indirect evidence “Ezoic is an award-winning technology platform that helps digital publishers maximize ad revenue and grow their audiences through advanced, easy-to-use solutions.” Source: RevenueBase Database · checked Sep 27, 2026
13	XANDR	Partial evidence	New York, United StatesHQ checked Sep 27, 2026	1,001-5,000	203 contacts →
	Partial evidence “Xandr, a part of Microsoft Advertising, powers a global marketplace for premium advertising.” Source: RevenueBase Database · checked Sep 27, 2026
14	Townsquare Ignite	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	199 contacts →
	Partial evidence “Townsquare Ignite is a customer-centric, data-driven technology provider of cross-platform advertising solutions including programmatic, search, marketing and client services.” Source: RevenueBase Database · checked Sep 27, 2026
15	SOVRN	Partial evidence	Boulder, CO, United StatesHQ checked Sep 27, 2026	51-200	183 contacts →
	Partial evidence “Sovrn is a software and data company built for the people who power the open internet.” Source: RevenueBase Database · checked Sep 27, 2026
16	Adcellerant	Indirect evidence	Denver, CO, United StatesHQ checked Sep 27, 2026	201-500	183 contacts →
	Indirect evidence “AdCellerant is a digital marketing platform and growth partner that helps media companies and agencies simplify operations, scale campaigns, and drive measurable growth.” Source: RevenueBase Database · checked Sep 27, 2026
17	Freestar	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 27, 2026	201-500	174 contacts →
	Indirect evidence “Freestar engineers cutting-edge monetization solutions for websites and apps.” Source: RevenueBase Database · checked Sep 27, 2026
18	JIVOX	Indirect evidence	San Mateo, CA, United StatesHQ checked Sep 27, 2026	51-200	167 contacts →
	Indirect evidence “Jivox is transforming the way the world experiences digital marketing.” Source: RevenueBase Database · checked Sep 27, 2026
19	Knorex	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	51-200	149 contacts →
	Partial evidence “Founded in 2009, Knorex is a technology company that provides programmatic advertising solutions to marketers to simplify digital marketing to accelerate business growth.” Source: RevenueBase Database · checked Sep 27, 2026
20	Sizmek By Amazon	Indirect evidence	New York, NY, United StatesHQ checked Sep 27, 2026	1,001-5,000	139 contacts →
	Indirect evidence “Sizmek by Amazon provides advertisers and agencies with solutions to create, distribute, measure, and optimize their messaging.” Source: RevenueBase Database · checked Sep 27, 2026
21	Exponential	Partial evidence	Emeryville, CA, United StatesHQ checked Sep 27, 2026	501-1,000	131 contacts →
	Partial evidence “Exponential Interactive delivers innovative advertising experiences that transform the way brands interact with audiences across desktop and mobile.” Source: RevenueBase Database · checked Sep 27, 2026
22	C1x INC	Indirect evidence	San Jose, United StatesHQ checked Sep 27, 2026	51-200	128 contacts →
	Indirect evidence “AI, Data & Revenue Technology for the Intelligent Enterprise C1X is a Silicon Valley-based AI, Data, and Revenue Technology company helping organizations transform data into…” Source: RevenueBase Database · checked Sep 27, 2026
23	Clinch	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	51-200	125 contacts →
	Partial evidence “Clinch is an AI-powered advertising technology company that enables brands and agencies to deliver relevant advertising across all channels more efficiently and effectively.” Source: RevenueBase Database · checked Sep 27, 2026
24	Ejam INC	Partial evidence	Newport Beach, CA, United StatesHQ checked Sep 27, 2026	11-50	98 contacts →
	Partial evidence “Ejam is a performance-based online advertising and marketing leader.” Source: RevenueBase Database · checked Sep 27, 2026
25	Adscholars	Partial evidence	Newark, DE, United StatesHQ checked Sep 27, 2026	51-200	92 contacts →
	Partial evidence “Adscholars is a digital 360 company, we’re a bunch of digital enthusiasts with varied skills in advertising and marketing that help our clients grow their business by adapting to…” Source: RevenueBase Database · checked Sep 27, 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: contextual advertising software 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 contextual advertising software companies.
Partial evidence: Its own public description names part of contextual advertising software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name contextual advertising software 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 500 contextual advertising software companies based in the United States

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Contextual advertising software companies based in the United States at a glance

As of Sep 27, 2026

44.7%Verified-email coverage

29.0Average contacts per company

11-50Median size (employees)

15.8%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

178

11-50

190

51-200

201-500

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 500 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 contextual advertising software 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 “contextual advertising software 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 contextual advertising software 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 contextual advertising software 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, 6,487 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 27, 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.

Contextual advertising software companies by metro

Contextual advertising software companies in New York79

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 contextual advertising software 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 contextual advertising software companies are there based in the United States?

RevenueBase identified 500 contextual advertising software 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?

TEADS, headquartered in New York, tops this list with the largest team on record.

Which city has the most contextual advertising software companies?

New York leads with 79 headquartered companies, followed by Los Angeles (21) and San Francisco (16).

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 6,487 verified decision-maker contacts tracked across these 500 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 27, 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.