Company lists · Data verified August 2026

Top 25 Contextual advertising platforms based in the United States

Name: Contextual advertising platforms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,670 companies tracked

There are 1,670 contextual advertising platforms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 45,391 professional contacts across them, including 20,105 with verified work emails and 13,764 with mobile numbers. New York is the largest hub.

This list covers contextual advertising platforms headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

1,670Companies

45,391Contacts tracked

20,105Verified emails

13,764Mobile numbers

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The 25 largest contextual advertising platforms based in the United States

Ranked by team size

Top 25 of 1,670 contextual advertising platforms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	The Trade Desk	Boston, MA	1,001-5,000	4,241	2,971
2	Zeta Global	Nashville, TN	1,001-5,000	2,570	1,644
3	Taboola	New York, NY	1,001-5,000	1,978	417
4	TEADS	New York, NY	1,001-5,000	1,794	965
5	Inmobi Advertising	New York	1,001-5,000	1,320	488
6	Pubmatic	Redwood City, CA	501-1,000	1,285	946
7	CJ	Santa Barbara, CA	501-1,000	1,209	456
8	Quinstreet	Foster City, CA	501-1,000	1,025	690
9	Ibotta	Denver, CO	501-1,000	974	573
10	BASIS	Chicago, IL	501-1,000	886	563
11	simpli.fi	Fort Worth, TX	501-1,000	677	470
12	Nexxen	New York, NY	501-1,000	666	514
13	Innovid	Chicago, IL	501-1,000	640	430
14	Perion	New York, NY	501-1,000	613	355
15	MGID	Los Angeles, CA	501-1,000	571	225
16	Brightedge	New York, NY	501-1,000	543	297
17	Quantcast	Seattle, WA	501-1,000	496	282
18	Viant Technology	Denver, CO	201-500	415	336
19	Triplelift	New York, NY	201-500	409	222
20	Localedge	Buffalo, NY	501-1,000	386	43
21	Databeat	Princeton, NJ	201-500	363	125
22	Outfront Media	New York, NY	1,001-5,000	336	159
23	Inmarket	Austin, TX	201-500	324	220
24	Madhive	New York, NY	501-1,000	299	198
25	Claritas	Cincinnati, OH	201-500	295	166

Showing 25 of 1,670 contextual advertising platforms based in the United States

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Contextual advertising platforms based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 237 HQs

13,764Contacts with mobile numbers

44Emails re-verified in last 30 days

Companies by employee count

1-10

727

11-50

624

51-200

216

201-500

501-1,000

1,001-5,000

10001+

Contextual advertising platforms by metro

Metro	Companies
Contextual advertising platforms in New York	237
Contextual advertising platforms in San Francisco	70
Contextual advertising platforms in Los Angeles	66
Contextual advertising platforms in Miami	48
Contextual advertising platforms in Chicago	41
Contextual advertising platforms in Sheridan	31
Contextual advertising platforms in Wilmington	29

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “contextual advertising platforms”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 44 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many contextual advertising platforms are there based in the United States?

There are 1,670 contextual advertising platforms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most contextual advertising platforms?

New York leads with 237 headquartered companies, followed by San Francisco (70) and Los Angeles (66).

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 20,105 verified decision-maker contacts tracked across these 1,670 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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Contextual advertising platforms by geography

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.