Company lists · Data verified August 2026

Top 25 Ad tech platforms based in the United States

Name: Ad tech 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 2,180 companies tracked

There are 2,180 ad tech platforms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 63,181 professional contacts across them, including 27,298 with verified work emails and 19,822 with mobile numbers. New York is the largest hub.

This list covers ad tech 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.

2,180Companies

63,181Contacts tracked

27,298Verified emails

19,822Mobile numbers

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The 25 largest ad tech platforms based in the United States

Ranked by team size

Top 25 of 2,180 ad tech 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	RTB House	San Francisco, CA	1,001-5,000	1,339	1,008
6	Inmobi Advertising	New York	1,001-5,000	1,320	488
7	Pubmatic	Redwood City, CA	501-1,000	1,285	946
8	CJ	Santa Barbara, CA	501-1,000	1,209	456
9	XR Extreme Reach	Burbank, CA	1,001-5,000	964	443
10	BASIS	Chicago, IL	501-1,000	886	563
11	DT	Arlington, VA	501-1,000	751	455
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	Videoamp	Los Angeles, CA	201-500	568	306
17	SKAI	San Francisco, CA	501-1,000	565	407
18	Quantcast	Seattle, WA	501-1,000	496	282
19	OPENX	Munchen	201-500	464	303
20	PIXIS	CA	201-500	440	159
21	Viant Technology	Denver, CO	201-500	415	336
22	Triplelift	New York, NY	201-500	409	222
23	Wideorbit	Lynnwood, WA	201-500	390	331
24	Viamedia	Lexington, KY	201-500	384	95
25	Databeat	Princeton, NJ	201-500	363	125

Showing 25 of 2,180 ad tech platforms based in the United States

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Ad tech platforms based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 401 HQs

19,822Contacts with mobile numbers

175Emails re-verified in last 30 days

Companies by employee count

1-10

857

11-50

869

51-200

315

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Ad tech platforms by metro

Metro	Companies
Ad tech platforms in New York	401
Ad tech platforms in San Francisco	124
Ad tech platforms in Los Angeles	110
Ad tech platforms in Miami	76
Ad tech platforms in Chicago	50
Ad tech platforms in Sheridan	42
Ad tech platforms in Denver	37

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 “ad tech 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; 175 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 ad tech platforms are there based in the United States?

There are 2,180 ad tech 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 ad tech platforms?

New York leads with 401 headquartered companies, followed by San Francisco (124) and Los Angeles (110).

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 27,298 verified decision-maker contacts tracked across these 2,180 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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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.