Company lists · Data refreshed September 2026

Top 25 Internal communications consultancies based in the United States

Name: Internal communications consultancies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 3,084 companies tracked

RevenueBase identified 3,084 internal communications consultancies headquartered in the United States as of September 2026 and tracks 32,985 professional contacts across them, including 12,762 with verified work emails. New York is the largest hub.

This list covers internal communications consultancies 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 28, 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 28, 2026 86% judged on-target in blind review

3,084Companies

32,985Contacts tracked

12,762Verified emails

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The 25 largest internal communications consultancies based in the United States

Ranked by team size

Top 25 of 3,084 internal communications consultancies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to internal communications consultancies: 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	Edelman	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,242 contacts →
	Partial evidence “Edelman is a global communications firm that partners with businesses and organizations to evolve, promote and protect their brands and reputations.” Source: RevenueBase Database · checked Sep 28, 2026
2	Ketchum	Partial evidence	New York City, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	963 contacts →
	Partial evidence “We are Ketchum, a global communications consultancy fueled by empathy and intelligence – progress at work for innovation, our employees and our clients since 1923.” Source: RevenueBase Database · checked Sep 28, 2026
3	Zeno Group	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	887 contacts →
	Partial evidence “Zeno Group is the fiercely independent and global, integrated communications agency, born from PR.” Source: RevenueBase Database · checked Sep 28, 2026
4	Porter Novelli	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	821 contacts →
	Partial evidence “Porter Novelli is the strategic communications company, fueled by innovation, empowering clients to do business better in an ever-changing world.” Source: RevenueBase Database · checked Sep 28, 2026
5	Ruder Finn	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	815 contacts →
	Partial evidence “Ruder Finn is one of the world’s largest global independent integrated marketing and communications agencies, leading at the intersection of technology, human creativity, and…” Source: RevenueBase Database · checked Sep 28, 2026
6	ICR	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	693 contacts →
	Partial evidence “ICR is a strategic communications and advisory firm that helps management teams align how they communicate with how markets think.” Source: RevenueBase Database · checked Sep 28, 2026
7	Allison Worldwide	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	587 contacts →
	Partial evidence “We’re a global integrated marketing and communications consultancy dedicated to driving growth, innovation and positive change for clients, colleagues and communities.” Source: RevenueBase Database · checked Sep 28, 2026
8	Prosek Partners	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	543 contacts →
	Indirect evidence “Prosek Partners builds – and protects – the top brands in business.” Source: RevenueBase Database · checked Sep 28, 2026
9	Sodali & CO	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	431 contacts →
	Indirect evidence “Sodali & Co advises corporate clients worldwide as they navigate the complex dynamic of shareholder and stakeholder interests.” Source: RevenueBase Database · checked Sep 28, 2026
10	Sunshine Sachs Morgan & Lylis	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	364 contacts →
	Partial evidence “Sunshine Sachs Morgan & Lylis is an independent, full-service firm specializing in communications and narrative strategy.” Source: RevenueBase Database · checked Sep 28, 2026
11	Jeffreygroup	Partial evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	201-500	329 contacts →
	Partial evidence “Founded in 1993, JeffreyGroup is the leading marketing, corporate communications and public affairs consultancy focused exclusively on Latin America.” Source: RevenueBase Database · checked Sep 28, 2026
12	Nail Communications	Indirect evidence	Providence, RI, United StatesHQ checked Sep 28, 2026	n/a	315 contacts →
	Indirect evidence “Nail Where every brand finds its fascinating.” Source: RevenueBase Database · checked Sep 28, 2026
13	G&s Business Communications, A G&s Agency	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	227 contacts →
	Partial evidence “G&S Business Communications is an independent B2B and B2B2C communications agency with over 55 years of experience helping organizations navigate complexity and build momentum.” Source: RevenueBase Database · checked Sep 28, 2026
14	Stratcomm, INC	Partial evidence	Framingham, MA, United StatesHQ checked Sep 28, 2026	51-200	225 contacts →
	Partial evidence “People always ask, what does strategic communications mean?” Source: RevenueBase Database · checked Sep 28, 2026
15	Devries Global	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	206 contacts →
	Indirect evidence “DeVries Global is a boutique agency with a global view that lives at the intersection of life and style.” Source: RevenueBase Database · checked Sep 28, 2026
16	Cohn & Wolfe	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	200 contacts →
	Partial evidence “Cohn & Wolfe, a global communications agency, builds brands and corporate reputations through an uncompromising commitment to creativity.” Source: RevenueBase Database · checked Sep 28, 2026
17	Mixing Board, Powered By Axios	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	n/a	197 contacts →
	Indirect evidence “Mixing Board is a community of top professionals who share insights, support each other, and seek to elevate the industry at large.” Source: RevenueBase Database · checked Sep 28, 2026
18	Coyne PR	Indirect evidence	Parsippany, NJ, United StatesHQ checked Sep 28, 2026	51-200	195 contacts →
	Indirect evidence “Every day is Independence Day at Coyne PR.” Source: RevenueBase Database · checked Sep 28, 2026
19	Marcus Thomas LLC	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 28, 2026	51-200	184 contacts →
	Partial evidence “We hang out at the intersection of brand and digital Marcus Thomas is a fully integrated marketing communications agency focused on audience insight, idea generation and…” Source: RevenueBase Database · checked Sep 28, 2026
20	Padilla	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	201-500	168 contacts →
	Partial evidence “Padilla is a full-service agency that transforms brands and organizations through strategically creative communications.” Source: RevenueBase Database · checked Sep 28, 2026
21	Orchestra	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	166 contacts →
	Partial evidence “Orchestra is a strategic communications and marketing company purpose-built for a world defined by speed, fragmentation and unprecedented transparency.” Source: RevenueBase Database · checked Sep 28, 2026
22	Finsbury Glover Hering	Indirect evidence	New York, United StatesHQ checked Sep 28, 2026	501-1,000	166 contacts →
	Indirect evidence “We are now FGS Global.” Source: RevenueBase Database · checked Sep 28, 2026
23	TSD Communications, INC	Indirect evidence	Washington, United StatesHQ checked Sep 28, 2026	51-200	166 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
24	Summit Marketing	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 28, 2026	51-200	158 contacts →
	Partial evidence “Summit Marketing is an integrated marketing communications firm with a track record of success in fundraising for nonprofit organizations and in sales and channel development for…” Source: RevenueBase Database · checked Sep 28, 2026
25	SIA Addison	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	155 contacts →
	Partial evidence “Sia/Addison creates strategy, design and communications for the world’s most respected corporate and B2B organizations, following our distinctive strategy made visible(TM)…” Source: RevenueBase Database · checked Sep 28, 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: internal communications consultancies. 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 internal communications consultancies.
Partial evidence: Its own public description names part of internal communications consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name internal communications consultancies. 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 3,084 internal communications consultancies based in the United States

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Internal communications consultancies based in the United States at a glance

As of Sep 28, 2026

38.7%Verified-email coverage

10.7Average contacts per company

1-10Median size (employees)

9.7%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

2,504

11-50

470

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,084 companies.

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 internal communications consultancies, 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 “internal communications consultancies”. 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 internal communications consultancies), 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 internal communications consultancies, 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, 12,762 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 28, 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.

Internal communications consultancies 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 internal communications consultancies, 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 internal communications consultancies are there based in the United States?

RevenueBase identified 3,084 internal communications consultancies 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?

Edelman, headquartered in New York, tops this list with the largest team on record.

Which city has the most internal communications consultancies?

New York leads with 298 headquartered companies, followed by Washington (148) and Chicago (107).

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 12,762 verified decision-maker contacts tracked across these 3,084 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 28, 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.