Company lists · Data verified August 2026

Top 25 Ad tech software companies based in the United States

Name: Ad tech software companies 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 1,761 companies tracked

There are 1,761 ad tech software companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 47,941 professional contacts across them, including 20,010 with verified work emails and 14,665 with mobile numbers. New York is the largest hub.

This list covers ad tech 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. Data current as of August 28, 2026.

1,761Companies

47,941Contacts tracked

20,010Verified emails

14,665Mobile numbers

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The 25 largest ad tech software companies based in the United States

Ranked by team size

Top 25 of 1,761 ad tech software companies 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	Taboola	New York, NY	1,001-5,000	1,978	417
3	TEADS	New York, NY	1,001-5,000	1,794	965
4	Inmobi Advertising	New York	1,001-5,000	1,320	488
5	Pubmatic	Redwood City, CA	501-1,000	1,285	946
6	BASIS	Chicago, IL	501-1,000	886	563
7	Nexxen	New York, NY	501-1,000	666	514
8	Innovid	Chicago, IL	501-1,000	640	430
9	Perion	New York, NY	501-1,000	613	355
10	MGID	Los Angeles, CA	501-1,000	571	225
11	Videoamp	Los Angeles, CA	201-500	568	306
12	Raptive	New York, NY	201-500	527	232
13	Quantcast	Seattle, WA	501-1,000	496	282
14	Branch	Mountain View, CA	201-500	456	286
15	M C Saatchi Performance	New York, NY	201-500	455	287
16	Viant Technology	Denver, CO	201-500	415	336
17	Triplelift	New York, NY	201-500	409	222
18	Wideorbit	Lynnwood, WA	201-500	390	331
19	Databeat	Princeton, NJ	201-500	363	125
20	vdx.tv	Emeryville, CA	201-500	325	166
21	Inmarket	Austin, TX	201-500	324	220
22	Oxagile	New York, NY	201-500	323	114
23	Harmelin Media	Bala Cynwyd, PA	201-500	299	203
24	KODDI	New York, NY	201-500	290	196
25	Marin Software	St Louis, MO	201-500	281	1

Showing 25 of 1,761 ad tech software companies based in the United States

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Ad tech software companies based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 318 HQs

14,665Contacts with mobile numbers

140Emails re-verified in last 30 days

Companies by employee count

1-10

713

11-50

675

51-200

261

201-500

501-1,000

1,001-5,000

5,001-10,000

Ad tech software companies by metro

Metro	Companies
Ad tech software companies in New York	318
Ad tech software companies in San Francisco	89
Ad tech software companies in Los Angeles	77
Ad tech software companies in Miami	60
Ad tech software companies in Chicago	40
Ad tech software companies in Sheridan	37
Ad tech software companies in Denver	35

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 software companies”, 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; 140 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 software companies are there based in the United States?

There are 1,761 ad tech software companies 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 software companies?

New York leads with 318 headquartered companies, followed by San Francisco (89) and Los Angeles (77).

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 20,010 verified decision-maker contacts tracked across these 1,761 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.