Company lists · Data refreshed September 2026

Top 25 Full service B2B marketing agencies based in the United States

Name: Full service B2B marketing agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 49,007 companies tracked

RevenueBase identified 49,007 full service B2B marketing agencies headquartered in the United States as of September 2026 and tracks 367,212 professional contacts across them, including 104,353 with verified work emails and 122,283 with mobile numbers. New York is the largest hub.

This list covers full service B2B marketing agencies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 24, 2026 86% judged on-target in blind review

49,007Companies

367,212Contacts tracked

104,353Verified emails

122,283Mobile numbers

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The 25 largest full service B2B marketing agencies based in the United States

Ranked by team size

Top 25 of 49,007 full service B2B marketing agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to full service B2B marketing agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Omnicom Media Group	Indirect evidence	New York, United StatesHQ checked Sep 24, 2026	10001+	3,989 contacts →
	Indirect evidence “Omnicom Media Group (OMG), the media services division of Omnicom Group Inc, delivers transformational experiences for consumers, clients, and talent.” Source: RevenueBase Database · checked Sep 24, 2026
2	Thompson	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	5,001-10,000	3,574 contacts →
	Indirect evidence “J.” Source: RevenueBase Database · checked Sep 24, 2026
3	Digitas North America	Indirect evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,654 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 24, 2026
4	GREY	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	5,001-10,000	2,648 contacts →
	Indirect evidence “Grey’s mission is to create Famously Effective ideas that move people, business, and the world forward-harnessing the power of creativity to solve business problems and deliver…” Source: RevenueBase Database · checked Sep 24, 2026
5	Publicis	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,531 contacts →
	Indirect evidence “You can either adapt to change, ignore it or lead it.” Source: RevenueBase Database · checked Sep 24, 2026
6	Horizon Media	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,368 contacts →
	Indirect evidence “Horizon Media is a leader in driving business-based outcomes for marketers.” Source: RevenueBase Database · checked Sep 24, 2026
7	Razorfish	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,763 contacts →
	Indirect evidence “Hi there!” Source: RevenueBase Database · checked Sep 24, 2026
8	Omnicom	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	10001+	1,727 contacts →
	Partial evidence “Omnicom is the world’s leading marketing and sales company, built for intelligent growth in the next era.” Source: RevenueBase Database · checked Sep 24, 2026
9	TBC	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 24, 2026	n/a	1,255 contacts →
	Partial evidence “TBC is an independently owned, full-service branding, advertising and strategic communications agency with headquarters in Baltimore, Maryland, USA.” Source: RevenueBase Database · checked Sep 24, 2026
10	CMI Media Group	Strong evidence	Philadelphia, PA, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,236 contacts →
	Strong evidence “CMI Media Group, a WPP company, is a global, full-service media agency focused solely on health, wellness, life sciences and pharmaceutical marketing.” Source: RevenueBase Database · checked Sep 24, 2026
11	Mccann	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	10001+	1,207 contacts →
	Indirect evidence “We build enduring brands that move people and markets through the radical creativity of Truth Well Told™.” Source: RevenueBase Database · checked Sep 24, 2026
12	2x	Strong evidence	Malvern, PA, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,046 contacts →
	Strong evidence “2X is the global leader in B2B marketing-as-a-service (MaaS), a subscription-based alternative to traditional B2B marketing delivery models.” Source: RevenueBase Database · checked Sep 24, 2026
13	Archway Marketing Services	Partial evidence	Maple Grove, MN, United StatesHQ checked Sep 24, 2026	1,001-5,000	929 contacts →
	Partial evidence “Archway is the preferred partner in marketing execution for well-known brands.” Source: RevenueBase Database · checked Sep 24, 2026
14	Logical Position	Indirect evidence	Lake Oswego, OR, United StatesHQ checked Sep 24, 2026	501-1,000	899 contacts →
	Indirect evidence “Logical Position (LP) is an Inc.” Source: RevenueBase Database · checked Sep 24, 2026
15	WEBFX	Partial evidence	Harrisburg, PA, United StatesHQ checked Sep 24, 2026	501-1,000	866 contacts →
	Partial evidence “We're here to be your digital marketing growth partner in the AI era.” Source: RevenueBase Database · checked Sep 24, 2026
16	NP Digital	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 24, 2026	1,001-5,000	866 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 24, 2026
17	Ziff Davis Performance Marketing	Indirect evidence	Austin, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	821 contacts →
	Indirect evidence “ZDPM is the coming together of Salesify and DemandShore.” Source: RevenueBase Database · checked Sep 24, 2026
18	MERGE	Partial evidence	Chicago, IL, United StatesHQ checked Sep 24, 2026	501-1,000	816 contacts →
	Partial evidence “MERGE is a marketing and technology agency built for the intersection of health and wellness.” Source: RevenueBase Database · checked Sep 24, 2026
19	Essence	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 24, 2026	1,001-5,000	782 contacts →
	Indirect evidence “Formerly Essence, we are now EssenceMediacom.” Source: RevenueBase Database · checked Sep 24, 2026
20	Allied Global Marketing	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 24, 2026	201-500	750 contacts →
	Partial evidence “In business for over 30 years, Allied has built upon its roots in film advertising and publicity to become a global leader in entertainment, culture, and lifestyle marketing.” Source: RevenueBase Database · checked Sep 24, 2026
21	Anteriad	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	501-1,000	740 contacts →
	Indirect evidence “Data Driven.” Source: RevenueBase Database · checked Sep 24, 2026
22	Abstrakt Marketing Group	Partial evidence	St Louis, MO, United StatesHQ checked Sep 24, 2026	501-1,000	724 contacts →
	Partial evidence “We book the qualified meetings that fill your pipeline for any B2B company ready to grow.” Source: RevenueBase Database · checked Sep 24, 2026
23	DONER	Partial evidence	Southfield, MI, United StatesHQ checked Sep 24, 2026	501-1,000	708 contacts →
	Partial evidence “Doner unlocks all the tools of Modern marketing to build lasting connections with every day, Main Street consumers.” Source: RevenueBase Database · checked Sep 24, 2026
24	Salebuild	Partial evidence	Redwood City, CA, United StatesHQ checked Sep 24, 2026	n/a	708 contacts →
	Partial evidence “Salesify, a leading provider of B2B demand generation services, helps our clients create pipeline and accelerate revenue by identifying, profiling, nurturing and connecting with…” Source: RevenueBase Database · checked Sep 24, 2026
25	Team ONE	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 24, 2026	201-500	698 contacts →
	Indirect evidence “Team One was founded with one philosophical focus: to construct brands of elevated aspiration and worth by attracting affluent consumers like never before.” Source: RevenueBase Database · checked Sep 24, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: full service B2B marketing agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names full service B2B marketing agencies.
Partial evidence: Its own public description names part of full service B2B marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name full service B2B marketing agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 49,007 full service B2B marketing agencies based in the United States

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Full service B2B marketing agencies based in the United States at a glance

As of Sep 24, 2026

28.4%Verified-email coverage

33.3%Mobile-number coverage

7.5Average contacts per company

1-10Median size (employees)

4.6%Largest-city concentration · New York

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

36,076

11-50

10,783

51-200

1,645

201-500

317

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 27.0d

77,8840–30

24,14631–60

1,39061–90

7190–180

862180+

Company record updated

Median 87.0d

00–30

90,15631–60

157,33561–90

100,28190–180

19,440180+

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 full service B2B marketing agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “full service B2B marketing agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names full service B2B marketing agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among full service B2B marketing agencies, 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 its RevenueBase Smart Search 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, 104,353 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 24, 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.

Full service B2B marketing agencies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names full service B2B marketing agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many full service B2B marketing agencies are there based in the United States?

RevenueBase identified 49,007 full service B2B marketing agencies 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?

Omnicom Media Group, headquartered in New York, tops this list with the largest team on record.

Which city has the most full service B2B marketing agencies?

New York leads with 2272 headquartered companies, followed by Los Angeles (1563) and Miami (1087).

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 104,353 verified decision-maker contacts tracked across these 49,007 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 24, 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 Smart Search, 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.