Company lists · Data refreshed September 2026

Top 25 Internal communications consultants worldwide

Name: Internal communications consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 23,961 companies tracked

RevenueBase identified 23,961 internal communications consultants worldwide as of September 2026 and tracks 159,598 professional contacts across them, including 35,250 with verified work emails. The United States is the largest market and London the largest hub.

This list covers internal communications consultants worldwide, 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. Country and city lists for internal communications consultants follow the table.

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

23,961Companies

159,598Contacts tracked

35,250Verified emails

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The 25 largest internal communications consultants worldwide

Ranked by team size

Top 25 of 23,961 internal communications consultants worldwide, 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	Idol Image Consulting	Indirect evidence	Kula, HI, TürkiyeHQ checked Sep 20, 2026	n/a	12,976 contacts →
	Indirect evidence “IDOL Image Consulting has developed strategies to help individuals, groups or corporate organizations face today’s challenges and fierce competition.” Source: RevenueBase Database · checked Sep 20, 2026
2	FSB Comunicação	Partial evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	501-1,000	1,277 contacts →
	Partial evidence “FSB Comunicações is an Integrated Communications agency focused on results.” Source: RevenueBase Database · checked Sep 20, 2026
3	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
4	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
5	Conseil Départemental	Partial evidence	FranceHQ checked Sep 20, 2026	n/a	873 contacts →
	Partial evidence “M&C Consultants est une entreprise spécialisée dans le champ du Conseil en gestion et développement de l'entreprise.” Source: RevenueBase Database · checked Sep 20, 2026
6	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
7	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
8	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
9	Atrevia	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	501-1,000	623 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
10	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
11	Steamtalmark	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 20, 2026	n/a	444 contacts →
	Indirect evidence “Steam en arbeidsmarktcommunicatie.” Source: RevenueBase Database · checked Sep 20, 2026
12	Emperor	Partial evidence	Aldgate, United KingdomHQ checked Sep 20, 2026	201-500	415 contacts →
	Partial evidence “Emperor is one of the UK's leading employee-owned creative communications agencies.” Source: RevenueBase Database · checked Sep 20, 2026
13	WMH Project	Partial evidence	Courbevoie, FranceHQ checked Sep 20, 2026	201-500	335 contacts →
	Partial evidence “WMH Project est un des groupes de communication hors média leaders en France et en Europe.” Source: RevenueBase Database · checked Sep 20, 2026
14	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
15	Publicis Canada	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 20, 2026	501-1,000	311 contacts →
	Indirect evidence “At Publicis we believe that change is shaped by those who are brave enough.” Source: RevenueBase Database · checked Sep 20, 2026
16	Kekst CNC	Strong evidence	Paris, United StatesHQ checked Sep 20, 2026	201-500	309 contacts →
	Strong evidence “Kekst CNC, the international strategic communications consultancy of Publicis Groupe, has pioneered strategic communications to help its clients achieve their most important…” Source: RevenueBase Database · checked Sep 20, 2026
17	PR Pundit Havas RED	Strong evidence	Gurgaon, IndiaHQ checked Sep 20, 2026	51-200	306 contacts →
	Strong evidence “PR Pundit Havas Red, part of the Havas Group (one of the world’s largest advertising and communication networks), is an award-winning integrated communications consultancy with a…” Source: RevenueBase Database · checked Sep 20, 2026
18	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
19	Miltton	Indirect evidence	Helsinki, FinlandHQ checked Sep 20, 2026	201-500	269 contacts →
	Indirect evidence “We are an explorative, dynamic and constantly curious consulting group, equipped to offer insight and inspiration to our clients in a changing world.” Source: RevenueBase Database · checked Sep 20, 2026
20	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
21	Omnicom Media Group Mena	Strong evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	501-1,000	247 contacts →
	Strong evidence “Our agencies provide strategic communication and media consultancy services to leading brands in Middle East and North Africa.” Source: RevenueBase Database · checked Sep 20, 2026
22	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
23	SEC Newgate Italia	Indirect evidence	Milano, ItalyHQ checked Sep 20, 2026	51-200	236 contacts →
	Indirect evidence “Al cuore di ogni organizzazione ci sono le sue relazioni: collaboratori, clienti, filiera, territorio, istituzioni… Perché sono gli "altri" i terminali del suo agire e i…” Source: RevenueBase Database · checked Sep 20, 2026
24	Kreab Worldwide	Partial evidence	Norrmalm, SwedenHQ checked Sep 20, 2026	501-1,000	235 contacts →
	Partial evidence “With 50 years of experience in strategic communications, we are proud to say that we have played an integral part in shaping the business landscape as we know it today.” Source: RevenueBase Database · checked Sep 20, 2026
25	LPM Comunicação	Strong evidence	Lisboa, PortugalHQ checked Sep 20, 2026	51-200	232 contacts →
	Strong evidence “LPM is the leading Communication and Public Relations consultancy in Portugal.” 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 23,961 internal communications consultants worldwide

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Internal communications consultants worldwide at a glance

As of Sep 20, 2026

22.1%Verified-email coverage

6.7Average contacts per company

1-10Median size (employees)

2.7%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

19,712

11-50

3,568

51-200

487

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for internal communications consultants are linked below.
What qualifies: Companies worldwide 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.
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, 35,250 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 location

100 lists · largest first

Every Internal communications consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 worldwide?

RevenueBase identified 23,961 internal communications consultants worldwide 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?

Idol Image Consulting, headquartered in Kula, tops this list with the largest team on record.

Which country has the most internal communications consultants?

The United States leads with 4,599 companies, followed by France (1,809) and the United Kingdom (1,601). Every internal communications consultants list by country and city is linked on this page.

Which city has the most internal communications consultants?

London leads with 640 headquartered companies, followed by Paris (534) and Sao Paulo (411).

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 35,250 verified decision-maker contacts tracked across these 23,961 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.