Company lists · Data refreshed September 2026

Top 25 Internal communications consultants based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 4,599 companies tracked

RevenueBase identified 4,599 internal communications consultants headquartered in the United States as of September 2026 and tracks 40,834 professional contacts across them, including 10,245 with verified work emails. New York is the largest hub.

This list covers internal communications consultants 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 20, 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 20, 2026 86% judged on-target in blind review

4,599Companies

40,834Contacts tracked

10,245Verified emails

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The 25 largest internal communications consultants based in the United States

Ranked by team size

Top 25 of 4,599 internal communications consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to internal communications consultants: 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	Ketchum	Strong evidence	New York City, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	963 contacts →
	Strong 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 20, 2026
2	Zeno Group	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 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 20, 2026
3	Porter Novelli	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 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 20, 2026
4	Ruder Finn	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 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 20, 2026
5	ICR	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 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 20, 2026
6	Prosek Partners	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	543 contacts →
	Indirect evidence “Prosek Partners builds – and protects – the top brands in business.” Source: RevenueBase Database · checked Sep 20, 2026
7	Nail Communications	Indirect evidence	Providence, RI, United StatesHQ checked Sep 20, 2026	n/a	315 contacts →
	Indirect evidence “Nail Where every brand finds its fascinating.” Source: RevenueBase Database · checked Sep 20, 2026
8	Berlinrosen, An Orchestra Company	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	302 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
9	The Lede Company	Partial evidence	Beverly Hills, NY, United StatesHQ checked Sep 20, 2026	51-200	247 contacts →
	Partial evidence “The Lede Company is a full-service strategy, communications and social impact consulting firm, specializing in corporate, entertainment, brand and nonprofit sectors.” Source: RevenueBase Database · checked Sep 20, 2026
10	Joele Frank	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	243 contacts →
	Partial evidence “Joele Frank is a strategic communications firm that enables clients to take control in key moments of challenge and opportunity, from bet-the-company situations to the ongoing…” Source: RevenueBase Database · checked Sep 20, 2026
11	Mixing Board, Powered By Axios	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 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 20, 2026
12	Orchestra	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 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 20, 2026
13	TSD Communications, INC	Indirect evidence	Washington, United StatesHQ checked Sep 20, 2026	51-200	166 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
14	SIA Addison	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 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 20, 2026
15	Inkhouse, An Orchestra Company	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	152 contacts →
	Partial evidence “A strategic communications agency, Inkhouse partners with innovators who are creating new markets or disrupting old ones-crafting stories and meeting audiences where they are.” Source: RevenueBase Database · checked Sep 20, 2026
16	WFD	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 20, 2026	11-50	143 contacts →
	Indirect evidence “At WFD Consulting we partner with our clients to create inspiring work environments where businesses succeed and employees thrive.” Source: RevenueBase Database · checked Sep 20, 2026
17	Summit Group	Indirect evidence	Silver Spring, MD, United StatesHQ checked Sep 20, 2026	51-200	140 contacts →
	Indirect evidence “We partner with organizations to live their brand; to make the most of their brand's strength and move the hearts and minds of the people who matter most to them.” Source: RevenueBase Database · checked Sep 20, 2026
18	The RBL Group	Indirect evidence	Provo, UT, United StatesHQ checked Sep 20, 2026	51-200	132 contacts →
	Indirect evidence “The RBL Group is a consulting and development firm.” Source: RevenueBase Database · checked Sep 20, 2026
19	Wachsman	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	130 contacts →
	Partial evidence “Wachsman is a leading strategy and communications firm advising the most advanced companies in technology and financial services.” Source: RevenueBase Database · checked Sep 20, 2026
20	RF Binder	Strong evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	122 contacts →
	Strong evidence “RF\|Binder is a fully integrated communications agency and consultancy that aligns communications and business strategy to achieve results.” Source: RevenueBase Database · checked Sep 20, 2026
21	The Zimmerman Agency	Partial evidence	Tallahassee, FL, United StatesHQ checked Sep 20, 2026	51-200	112 contacts →
	Partial evidence “The Zimmerman Agency is a hyper-integrated marketing communications company providing a significant depth of services including strategic planning, creative + media development…” Source: RevenueBase Database · checked Sep 20, 2026
22	Narrative Strategies	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	111 contacts →
	Partial evidence “Narrative is a full-service strategic communications firm creatively solving today’s most demanding reputational and public affairs challenges.” Source: RevenueBase Database · checked Sep 20, 2026
23	Partnercomm, INC	Partial evidence	Arlington, TX, United StatesHQ checked Sep 20, 2026	51-200	110 contacts →
	Partial evidence “At PartnerComm, employee communication isn’t just part of what we do, it’s all we do.” Source: RevenueBase Database · checked Sep 20, 2026
24	Lambert	Partial evidence	Grand Rapids, MI, United StatesHQ checked Sep 20, 2026	51-200	99 contacts →
	Partial evidence “Founded in 1998, Lambert is a strategic communications and advisory firm specializing in public relations, investor relations and integrated marketing.” Source: RevenueBase Database · checked Sep 20, 2026
25	Stop At Nothing, INC	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 20, 2026	11-50	97 contacts →
	Indirect evidence “Stop At Nothing positively impacts company productivity, results, and the bottom line by improving employee engagement, creativity, and innovation.” Source: RevenueBase Database · checked Sep 20, 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 consultants. 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 consultants.
Partial evidence: Its own public description names part of internal communications consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name internal communications consultants. 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 4,599 internal communications consultants based in the United States

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Internal communications consultants based in the United States at a glance

As of Sep 20, 2026

25.1%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

7.3%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

3,943

11-50

565

51-200

201-500

501-1,000

1,001-5,000

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 4,599 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 consultants, 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 consultants”. 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 consultants), 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 consultants, 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, 10,245 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 20, 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 consultants 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 consultants, 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 consultants are there based in the United States?

RevenueBase identified 4,599 internal communications consultants 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?

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

Which city has the most internal communications consultants?

New York leads with 335 headquartered companies, followed by Washington (205) and Chicago (158).

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 10,245 verified decision-maker contacts tracked across these 4,599 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 20, 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.