Company lists · Data refreshed October 2026

Top 25 Internal communications consulting firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 10,421 companies tracked

RevenueBase identified 10,421 company matches for internal communications consulting firms associated with the United States as of October 2026 and tracks 97,179 professional contacts across them, including 30,042 with verified work emails and 32,861 with mobile numbers. New York is the largest hub.

This list covers company matches for internal communications consulting firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 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 RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built

10,421Companies

97,179Contacts tracked

30,042Verified emails

32,861Mobile numbers

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The 25 largest internal communications consulting firms based in the United States

Ranked by team size

Top 25 of 10,421 company matches for internal communications consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Edelman	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	5,001-10,000	6,242 contacts →
	Exact match “Edelman is a global communications firm that partners with businesses and organizations to evolve, promote and protect their brands and reputations.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Heidrick & Struggles	Exact match	Chicago, IL, United StatesHQ recorded Oct 1, 2026	1,001-5,000	3,376 contacts →
	Exact match “Heidrick & Struggles is the premier provider of executive search, corporate culture and leadership consulting services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	TENEO	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,930 contacts →
	Exact match “Teneo is the global CEO advisory firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	MCA	Exact match	Westport, CT, United StatesHQ recorded Oct 1, 2026	n/a	1,650 contacts →
	Exact match “MCAworks is a strategic marketing consulting firm passionately dedicated to helping our clients accelerate and sustain business growth.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	Hill & Knowlton	Exact match	NY, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,450 contacts →
	Exact match “Hill & Knowlton is a strategic and creative partner to drive breakthrough opportunities for growth and value creation, advance corporate strategy, and build reputation capital and…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	W3global	Exact match	Frisco, TX, United StatesHQ recorded Oct 1, 2026	501-1,000	1,149 contacts →
	Exact match “W3Global is a leading provider of end-to-end consulting services, empowering businesses to achieve their strategic goals and optimize their operations.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Ketchum	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	1,001-5,000	963 contacts →
	Exact match “We are Ketchum, a global communications consultancy fueled by empathy and intelligence – progress at work for innovation, our employees and our clients since 1923.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Zeno Group	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	501-1,000	887 contacts →
	Exact match “Zeno Group is the fiercely independent and global, integrated communications agency, born from PR.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	Porter Novelli	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	501-1,000	821 contacts →
	Exact match “Porter Novelli is the strategic communications company, fueled by innovation, empowering clients to do business better in an ever-changing world.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Ruder Finn	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	1,001-5,000	815 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	Lucas Group	Exact match	Los Angeles, CA, United StatesHQ recorded Oct 1, 2026	10001+	756 contacts →
	Exact match “Ultimate Minds is a professional consulting and marketing firm dedicated to empowering businesses, nonprofits, and startups with smart, affordable, and results-driven solutions.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	ICR	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	201-500	693 contacts →
	Exact match “ICR is a strategic communications and advisory firm that helps management teams align how they communicate with how markets think.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	Prophet	Exact match	San Francisco, CA, United StatesHQ recorded Oct 1, 2026	501-1,000	661 contacts →
	Exact match “Prophet is the Uncommon Growth Company-accelerating impact for business and marketing leaders through consulting, experience, and creative services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Allison Worldwide	Exact match	San Francisco, CA, United StatesHQ recorded Oct 1, 2026	501-1,000	587 contacts →
	Exact match “We’re a global integrated marketing and communications consultancy dedicated to driving growth, innovation and positive change for clients, colleagues and communities.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Prosek Partners	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	201-500	543 contacts →
	Exact match “Prosek Partners builds – and protects – the top brands in business.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16	Sodali & CO	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	501-1,000	431 contacts →
	Exact match “Sodali & Co advises corporate clients worldwide as they navigate the complex dynamic of shareholder and stakeholder interests.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	Sunshine Sachs Morgan & Lylis	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	201-500	364 contacts →
	Exact match “Sunshine Sachs Morgan & Lylis is an independent, full-service firm specializing in communications and narrative strategy.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	DKC	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	201-500	349 contacts →
	Exact match “DKC is a full service public relations, marketing and government affairs firm and part of the Acceleration Community of Companies, Based in New York City, and with offices in Los…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	Jeffreygroup	Exact match	Miami, FL, United StatesHQ recorded Oct 1, 2026	201-500	329 contacts →
	Exact match “Founded in 1993, JeffreyGroup is the leading marketing, corporate communications and public affairs consultancy focused exclusively on Latin America.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Nail Communications	Exact match	Providence, RI, United StatesHQ recorded Oct 1, 2026	n/a	315 contacts →
	Exact match “Nail Where every brand finds its fascinating.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	Sterling-Rice Group	Exact match	Boulder, CO, United StatesHQ recorded Oct 1, 2026	51-200	306 contacts →
	Exact match “SRG is a strategic growth consultancy that works across our broad portfolio of practice areas- insights, innovation, culinary, design, branding, and advertising-to uncover truths…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	Berlinrosen, An Orchestra Company	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	201-500	302 contacts →
	Exact match “Built to operate with the speed and intensity of a political campaign, BerlinRosen takes a 360-degree approach to communications, activating audiences and elevating story above…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Newlink	Exact match	Miami, FL, United StatesHQ recorded Oct 1, 2026	201-500	294 contacts →
	Exact match “Newlink is a global consulting firm founded in 1998 by Sergio Roitberg, headquartered in Miami with offices in Argentina, Mexico, Peru, Spain, and the Dominican Republic, and a…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	Reingold, INC	Exact match	Alexandria, VA, United StatesHQ recorded Oct 1, 2026	201-500	282 contacts →
	Exact match “Reingold is a full-service strategic communications and marketing firm, helping clients tell stories that get results.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	Wimmer Solutions	Exact match	Seattle, WA, United StatesHQ recorded Oct 1, 2026	501-1,000	262 contacts →
	Exact match “We help you to see the full picture, bringing our experts together with you to co-develop approaches and operationalize plans across the dimension of strategy, people, process…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “internal communications consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 10,421 internal communications consulting firms based in the United States

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Internal communications consulting firms based in the United States at a glance

As of Oct 1, 2026

30.9%Verified-email coverage

33.8%Mobile-number coverage

9.3Average contacts per company

1-10Median size (employees)

7.6%Largest-city concentration · New York

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

8,524

11-50

1,580

51-200

219

201-500

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 34.0d

4,7850–30

24,03631–60

98061–90

2590–180

216180+

Company record updated

Median 94.0d

00–30

13,04231–60

30,08261–90

49,20990–180

4,846180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “internal communications consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 30,042 professional contacts with verified work emails across the full matched dataset. 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 October 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Internal communications consulting firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “internal communications consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many internal communications consulting firms are there based in the United States?

RevenueBase identified 10,421 company matches for internal communications consulting firms associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Edelman tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most internal communications consulting firms?

New York leads with 790 company records, followed by Chicago (351) and Washington (335).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 30,042 professional contacts with verified work emails tracked across these 10,421 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 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.