Company lists · Data verified August 2026

Top 25 Advertising consulting firms based in the United States

Name: Advertising consulting firms 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 20,481 companies tracked

There are 20,481 advertising consulting firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 160,996 professional contacts across them, including 46,428 with verified work emails and 58,758 with mobile numbers. New York is the largest hub.

This list covers advertising consulting firms 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.

20,481Companies

160,996Contacts tracked

46,428Verified emails

58,758Mobile numbers

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The 25 largest advertising consulting firms based in the United States

Ranked by team size

Top 25 of 20,481 advertising consulting firms 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	Deloitte Digital	Denver, CO	10001+	7,701	2,261
2	Publicis	San Francisco, CA	1,001-5,000	2,551	106
3	Horizon Media	Los Angeles, CA	1,001-5,000	2,354	1,588
4	Omnicom	New York, NY	10001+	1,702	274
5	Hakuhodo INC	New York, NY	1,001-5,000	1,149	280
6	Essence	Minneapolis, MN	1,001-5,000	788	139
7	Lucas Group	Los Angeles, CA	10001+	765	19
8	DONER	Southfield, MI	501-1,000	704	271
9	Vertis Communications	Sussex, WI	10001+	605	28
10	Stream Companies	Malvern, PA	501-1,000	580	313
11	Martin	Richmond, VA	201-500	503	289
12	Gsd&m	Austin, TX	501-1,000	500	193
13	R&r Partners	Highlands Ranch, CO	201-500	496	213
14	Barkleyokrp	Denver, CO	501-1,000	494	383
15	Tombras	Alexandria, VA	201-500	491	374
16	22squared	Atlanta, GA	201-500	449	170
17	Mullenlowe U.S	El Segundo, CA	201-500	413	96
18	Horizon Next	New York, NY	201-500	351	270
19	Cramer-Krasselt	Milwaukee, WI	201-500	296	74
20	Prisma	Baton Rouge, LA	201-500	295	165
21	Reingold, INC	Alexandria, VA	201-500	281	239
22	Drive Social Media	Atlanta, GA	201-500	279	1
23	Abelsontaylor Group	Chicago, IL	201-500	267	92
24	OMD Media Direction	New York	201-500	261	26
25	Fusion92	Farmington Hills, MI	201-500	241	193

Showing 25 of 20,481 advertising consulting firms based in the United States

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Advertising consulting firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 1060 HQs

58,758Contacts with mobile numbers

327Emails re-verified in last 30 days

Companies by employee count

1-10

15,645

11-50

4,146

51-200

543

201-500

501-1,000

1,001-5,000

10001+

Advertising consulting firms by metro

Metro	Companies
Advertising consulting firms in New York	1060
Advertising consulting firms in Los Angeles	652
Advertising consulting firms in Chicago	446
Advertising consulting firms in Atlanta	428
Advertising consulting firms in Miami	374
Advertising consulting firms in Houston	302
Advertising consulting firms in Dallas	296

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 “advertising consulting firms”, 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; 327 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 advertising consulting firms are there based in the United States?

There are 20,481 advertising consulting firms headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Deloitte Digital, headquartered in Denver, tops this list with the largest team on record.

Which city has the most advertising consulting firms?

New York leads with 1060 headquartered companies, followed by Los Angeles (652) and Chicago (446).

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 46,428 verified decision-maker contacts tracked across these 20,481 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.