Company lists · Data refreshed September 2026

Top 25 Marketing consultant firms based in the United States

Name: Marketing consultant firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 55,599 companies tracked

RevenueBase identified 55,599 marketing consultant firms headquartered in the United States as of September 2026 and tracks 333,904 professional contacts across them, including 89,889 with verified work emails and 114,509 with mobile numbers. New York is the largest hub.

This list covers marketing consultant 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. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

55,599Companies

333,904Contacts tracked

89,889Verified emails

114,509Mobile numbers

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The 25 largest marketing consultant firms based in the United States

Ranked by team size

Top 25 of 55,599 marketing consultant firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names marketing consultant firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Digitas North AmericaIndirect evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,654
	“Digitas is the Networked Experience Agency, built on the vision that we create magnetic experiences that earn the right for brands to exist in human networks.” Source: company website · checked Sep 5, 2026
2	Frost & SullivanIndirect evidence	San Antonio, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,330
	“For over six decades, Frost & Sullivan has helped the world’s top companies toward transformational growth journeys that result in a stream of innovative growth opportunities.” Source: company website · checked Sep 5, 2026
3	RazorfishIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,763
	“Hi there!” Source: company website · checked Sep 5, 2026
4	OmnicomPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	10001+	1,727
	“Omnicom is the world’s leading marketing and sales company, built for intelligent growth in the next era.” Source: company website · checked Sep 5, 2026
5	Power Digital MarketingStrong evidence	San Diego, CA, United StatesHQ checked Sep 5, 2026	501-1,000	1,570
	“Power Digital is a growth marketing firm fueled by technology and driven by a talented team of consultative marketers, creatives, analysts and technologists.” Source: company website · checked Sep 5, 2026
6	W3globalIndirect evidence	Frisco, TX, United StatesHQ checked Sep 5, 2026	501-1,000	1,149
	“W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Source: company website · checked Sep 5, 2026
7	NP DigitalIndirect evidence	San Diego, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	866
	“Neil Patel has been recognized by the Wall Street Journal, Forbes, and the United Nations, to name a few, as one of the most influential and successful marketers and entrepreneurs…” Source: company website · checked Sep 5, 2026
8	EssenceIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	782
	“Formerly Essence, we are now EssenceMediacom.” Source: company website · checked Sep 5, 2026
9	Lucas GroupPartial evidence	Los Angeles, CA, United StatesHQ checked Sep 5, 2026	10001+	756
	“Ultimate Minds is a professional consulting and marketing firm dedicated to empowering businesses, nonprofits, and startups with smart, affordable, and results-driven solutions.” Source: company website · checked Sep 5, 2026
10	Abstrakt Marketing GroupIndirect evidence	St Louis, MO, United StatesHQ checked Sep 5, 2026	501-1,000	724
	“We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Source: company website · checked Sep 5, 2026
11	SCIIndirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	501-1,000	696
	“SCI was merged and sold to WPP in 2010.” Source: company website · checked Sep 5, 2026
12	SEIIndirect evidence	Cincinnati, OH, United StatesHQ checked Sep 5, 2026	501-1,000	618
	“SEI is a management consulting firm delivering fresh perspectives and reliable results.” Source: company website · checked Sep 5, 2026
13	Vertis CommunicationsIndirect evidence	Sussex, WI, United StatesHQ checked Sep 5, 2026	10001+	605
	“Vertis Communications was acquired by Quad/Graphics in January 2013.” Source: company website · checked Sep 5, 2026
14	IquantiPartial evidence	Jersey City, NJ, United StatesHQ checked Sep 5, 2026	501-1,000	538
	“iQuanti was founded to deliver on the promise of high-performance digital marketing, combining deep analytics, proprietary technology, and a results-driven approach.” Source: company website · checked Sep 5, 2026
15	Allied Market ResearchIndirect evidence	Wilmington, DE, United StatesHQ checked Sep 5, 2026	501-1,000	508
	“Driven by innovation and value addition approach, Allied Market Research is instrumental in market research and business consulting across various industry verticals since its…” Source: company website · checked Sep 5, 2026
16	AmsivePartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	488
	“Amsive is a data-driven performance marketing agency that enhances marketing ROI through innovative customer acquisition and engagement solutions.” Source: company website · checked Sep 5, 2026
17	MavlersPartial evidence	San Jose, CA, United StatesHQ checked Sep 5, 2026	501-1,000	488
	“At Mavlers, we’re more than just a digital marketing and technology partner-we’re your behind-the-scenes powerhouse.” Source: company website · checked Sep 5, 2026
18	Sg360Indirect evidence	Wheeling, IL, United StatesHQ checked Sep 5, 2026	501-1,000	477
	“sg360° can help you identify and connect with your best prospects 1:1, both offline and on.” Source: company website · checked Sep 5, 2026
19	AMPIndirect evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	501-1,000	450
	“Today’s best brands don’t just generate attention-they earn it, and they know how to convert it.” Source: company website · checked Sep 5, 2026
20	Product ConnectionsPartial evidence	Bentonville, AR, United StatesHQ checked Sep 5, 2026	10001+	387
	“Product Connections (PCX) is a full-service marketing agency built to move fast and deliver.” Source: company website · checked Sep 5, 2026
21	marketing.comPartial evidence	Eureka, MO, United StatesHQ checked Sep 5, 2026	1,001-5,000	309
	“From click to print and everything in between, we’re not changing marketing, just how it’s done.” Source: company website · checked Sep 5, 2026
22	Front ROWIndirect evidence	New York, CA, United StatesHQ checked Sep 5, 2026	501-1,000	292
	“Front Row is a growth partner that helps brands lead on marketplaces and win in commerce.” Source: company website · checked Sep 5, 2026
23	Atcs INCPartial evidence	Montvale, NJ, United StatesHQ checked Sep 5, 2026	501-1,000	275
	“ATCS is a Technology Consulting firm providing services in the area of Enterprise IT, Digital Transformation, Data Analytics and Marketing Insights.” Source: company website · checked Sep 5, 2026
24	The Integer GroupIndirect evidence	Denver, CO, United StatesHQ checked Sep 5, 2026	1,001-5,000	234
	“We are the Growth Company.” Source: company website · checked Sep 5, 2026
25	Metasys TechnologiesPartial evidence	Atlanta, GA, United StatesHQ checked Sep 5, 2026	501-1,000	217
	“Metasys is a global digital consulting firm that specializes in delivering solutions across a variety of business functions, including HR, Procurement, Marketing, Finance, and…” Source: company website · checked Sep 5, 2026

Showing 25 of 55,599 marketing consultant firms based in the United States

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Marketing consultant firms based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 2491 HQs

114,509Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

42,911

11-50

10,716

51-200

1,522

201-500

275

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

83,669

31–60

5,360

61–90

90–180

180+

773

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 marketing consultant firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “marketing consultant firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among marketing consultant firms, 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 an evidence 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, 89,889 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 5, 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.

Marketing consultant firms by metro

Marketing consultant firms in New York2491
Marketing consultant firms in Los Angeles1547
Marketing consultant firms in Chicago1149
Marketing consultant firms in Miami1126
Marketing consultant firms in Atlanta1121
Marketing consultant firms in Houston902
Marketing consultant firms in Austin857

Frequently asked

How many marketing consultant firms are there based in the United States?

RevenueBase identified 55,599 marketing consultant firms 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?

Digitas North America, headquartered in Boston, tops this list with the largest team on record.

Which city has the most marketing consultant firms?

New York leads with 2491 headquartered companies, followed by Los Angeles (1547) and Chicago (1149).

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 89,889 verified decision-maker contacts tracked across these 55,599 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 5, 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 SmartSearch, 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.