Company lists · Data refreshed August 2026

Top 25 Communications consulting firms based in the United States

Name: 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 Aug 31, 2026 5,945 companies tracked

RevenueBase identified 5,945 communications consulting firms headquartered in the United States as of August 2026 and tracks 56,011 professional contacts across them, including 16,822 with verified work emails and 18,919 with mobile numbers. New York is the largest hub.

This list covers communications consulting 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

5,945Companies

56,011Contacts tracked

16,822Verified emails

18,919Mobile numbers

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The 25 largest communications consulting firms based in the United States

Ranked by team size

Top 25 of 5,945 communications consulting firms based in the United States, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to communications consulting firms: 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	Hill & Knowlton	Indirect evidence	Austin, TX, United States	1,001-5,000	1,463 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Aug 31, 2026
2	Zeno Group	Partial evidence	New York, NY, United States	501-1,000	901 contacts →
	Partial evidence “Zeno Group is the fiercely independent and global, integrated communications agency, born from PR.” Source: RevenueBase Database · checked Aug 31, 2026
3	Porter Novelli	Partial evidence	New York, NY, United States	501-1,000	831 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 Aug 31, 2026
4	ICR	Partial evidence	San Francisco, CA, United States	201-500	684 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 Aug 31, 2026
5	Prosek Partners	Indirect evidence	Boston, MA, United States	201-500	541 contacts →
	Indirect evidence “Prosek Partners builds – and protects – the top brands in business.” Source: RevenueBase Database · checked Aug 31, 2026
6	Sunshine Sachs Morgan & Lylis	Partial evidence	Los Angeles, CA, United States	201-500	361 contacts →
	Partial evidence “Sunshine Sachs Morgan & Lylis is an independent, full-service firm specializing in communications and narrative strategy.” Source: RevenueBase Database · checked Aug 31, 2026
7	DKC	Indirect evidence	New York, NY, United States	201-500	346 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Aug 31, 2026
8	Berlinrosen, An Orchestra Company	Partial evidence	New York, NY, United States	201-500	307 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 Aug 31, 2026
9	Cartesian	Partial evidence	Somerset, NJ, United States	201-500	298 contacts →
	Partial evidence “Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…” Source: RevenueBase Database · checked Aug 31, 2026
10	Joele Frank	Partial evidence	San Francisco, CA, United States	201-500	250 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 Aug 31, 2026
11	Edelman Smithfield	Partial evidence	United States	201-500	241 contacts →
	Partial evidence “Edelman Smithfield is a financial communications boutique that specializes in the financial markets and special situations, serving clients in the United States, Canada, EMEA…” Source: RevenueBase Database · checked Aug 31, 2026
12	Jackson Spalding	Indirect evidence	Los Angeles, CA, United States	51-200	168 contacts →
	Indirect evidence “At Jackson Spalding, we love a good story.” Source: RevenueBase Database · checked Aug 31, 2026
13	Orchestra	Partial evidence	New York, NY, United States	501-1,000	167 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 Aug 31, 2026
14	Rational 360	Partial evidence	Washington, DC, United States	51-200	157 contacts →
	Partial evidence “The Rational Way: All in Partners Rational 360 is a leading full-service strategic communications and digital agency, with offices and staff located across the country.” Source: RevenueBase Database · checked Aug 31, 2026
15	SIA Addison	Indirect evidence	New York, NY, United States	51-200	154 contacts →
	Indirect evidence “Sia/Addison is a creative agency with over 100 award-winning thinkers, designers, content creators, digital storytellers, and developers - all under one roof.” Source: RevenueBase Database · checked Aug 31, 2026
16	Clarity	Indirect evidence	Los Angeles, CA, United States	51-200	125 contacts →
	Indirect evidence “Behind every ambitious B2B technology brand is a leadership team facing complex, high-stakes growth tensions and internal fragmentation.” Source: RevenueBase Database · checked Aug 31, 2026
17	ACTUM	Partial evidence	Los Angeles, CA, United States	51-200	123 contacts →
	Partial evidence “Actum is a global consulting firm built to solve complex problems at the intersection of business, politics and media.” Source: RevenueBase Database · checked Aug 31, 2026
18	Quest Corporation Of America, Inc. Quest	Partial evidence	Land O Lakes, FL, United States	51-200	122 contacts →
	Partial evidence “Serving clients since 1995, Quest Corporation of America, Inc.(Quest) provides Communications, Community Involvement, Compliance Administration, Creative Graphics, and Web Design…” Source: RevenueBase Database · checked Aug 31, 2026
19	RF Binder	Partial evidence	Los Angeles, CA, United States	51-200	122 contacts →
	Partial evidence “RF\|Binder is a fully integrated communications agency and consultancy that aligns communications and business strategy to achieve results.” Source: RevenueBase Database · checked Aug 31, 2026
20	Campbell Marketing & Communications	Partial evidence	Dearborn, MI, United States	51-200	113 contacts →
	Partial evidence “Campbell Marketing and Communications, founded in 1982 as Campbell & Co, is located in Dearborn, Mich.” Source: RevenueBase Database · checked Aug 31, 2026
21	Vested	Partial evidence	New York, NY, United States	51-200	111 contacts →
	Partial evidence “Vested is a world-leading integrated marketing and communications consultancy focused exclusively on the financial services industry.” Source: RevenueBase Database · checked Aug 31, 2026
22	VOX Global	Indirect evidence	Indianapolis, IN, United States	51-200	100 contacts →
	Indirect evidence “It starts with a goal: yours.” Source: RevenueBase Database · checked Aug 31, 2026
23	Lambert	Partial evidence	Grand Rapids, MI, United States	51-200	98 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 Aug 31, 2026
24	H Advisors Abernathy	Partial evidence	New York, NY, United States	51-200	87 contacts →
	Partial evidence “H/Advisors Abernathy is a trusted strategic communications advisor that partners with companies, investment firms and other organizations to engage core stakeholders as they…” Source: RevenueBase Database · checked Aug 31, 2026
25	Blue Streak	Strong evidence	Miami, FL, United States	501-1,000	85 contacts →
	Strong evidence “Blue Streak is a leading communications construction, consulting and engineering company.” Source: RevenueBase Database · checked Aug 31, 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: communications consulting firms. 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 communications consulting firms.
Partial evidence: Its own public description names part of communications consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name communications consulting firms. 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 5,945 communications consulting firms based in the United States

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Communications consulting firms based in the United States at a glance

As of Aug 31, 2026

30.0%Verified-email coverage

33.8%Mobile-number coverage

9.4Average contacts per company

1-10Median size (employees)

8.1%Largest-city concentration · New York

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

4,808

11-50

963

51-200

130

201-500

501-1,000

1,001-5,000

5,001-10,000

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 communications consulting firms, 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 “communications consulting firms”. 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 communications consulting firms), 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 communications consulting 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 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, 16,822 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 August 31, 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.

Communications consulting firms 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 communications consulting firms, 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 communications consulting firms are there based in the United States?

RevenueBase identified 5,945 communications consulting firms headquartered in the United States as of August 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?

Hill & Knowlton, headquartered in Austin, tops this list with the largest team on record.

Which city has the most communications consulting firms?

New York leads with 483 headquartered companies, followed by Washington (348) and Los Angeles (206).

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 16,822 verified decision-maker contacts tracked across these 5,945 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.