Company lists · Data refreshed November 2026

Top 25 Internal communication strategy firms worldwide

Name: Internal communication strategy firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 24,810 companies tracked

RevenueBase identified 24,810 company matches for internal communication strategy firms worldwide as of November 2026 and tracks 157,098 professional contacts across them, including 38,887 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for internal communication strategy firms worldwide, 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 November 6, 2026. Country and city lists for internal communication strategy firms follow the table.

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 Nov 6, 2026 How this list was built

24,810Companies

157,098Contacts tracked

38,887Verified emails

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The 25 largest internal communication strategy firms worldwide

Ranked by team size

Top 25 of 24,810 company matches for internal communication strategy firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Diversified	Exact match	Plano, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,744 contacts →
	Exact match “At Diversified, we leverage the best in technology and ongoing advisory services to transform businesses.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Improfit	Exact match	Montevideo, UruguayHQ recorded Nov 6, 2026	n/a	1,851 contacts →
	Exact match “Improfit es una agencia de comunicación corporativa y organizacional fundada en en Montevideo, Uruguay.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	FSB Comunicação	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 6, 2026	501-1,000	1,387 contacts →
	Exact match “FSB Comunicações is an Integrated Communications agency focused on results.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Ruder Finn	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	1,001-5,000	942 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 · Nov 6, 2026 · View company records in RevenueBase
5	Zeno Group	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	930 contacts →
	Exact match “Zeno Group is the fiercely independent and global, integrated communications agency, born from PR.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Ketchum	Exact match	New York, United StatesHQ recorded Nov 6, 2026	1,001-5,000	794 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 · Nov 6, 2026 · View company records in RevenueBase
7	Porter Novelli	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	784 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 · Nov 6, 2026 · View company records in RevenueBase
8	ICR	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	201-500	773 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 · Nov 6, 2026 · View company records in RevenueBase
9	JKL	Exact match	Stockholm, SwedenHQ recorded Nov 6, 2026	51-200	508 contacts →
	Exact match “JKL is now Kekst CNC Stockholm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Emperor	Exact match	Aldgate, United KingdomHQ recorded Nov 6, 2026	201-500	445 contacts →
	Exact match “Emperor is one of the UK's leading employee-owned creative communications agencies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Steamtalmark	Exact match	Amsterdam, NetherlandsHQ recorded Nov 6, 2026	n/a	376 contacts →
	Exact match “Steam en arbeidsmarktcommunicatie.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	GCI	Exact match	Lisbon, PortugalHQ recorded Nov 6, 2026	n/a	374 contacts →
	Exact match “Brand Influence” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	WMH Project	Exact match	Courbevoie, FranceHQ recorded Nov 6, 2026	201-500	350 contacts →
	Exact match “WMH Project est un des groupes de communication hors média leaders en France et en Europe.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Nail Communications	Exact match	Providence, RI, United StatesHQ recorded Nov 6, 2026	n/a	348 contacts →
	Exact match “Nail Where every brand finds its fascinating.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	PR Pundit Havas RED	Exact match	Gurgaon, IndiaHQ recorded Nov 6, 2026	51-200	337 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Publicis Canada	Exact match	Montreal, ON, CanadaHQ recorded Nov 6, 2026	501-1,000	318 contacts →
	Exact match “At Publicis we believe that change is shaped by those who are brave enough.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Reingold, INC	Exact match	Alexandria, VA, United StatesHQ recorded Nov 6, 2026	201-500	305 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 · Nov 6, 2026 · View company records in RevenueBase
18	The Lede Company	Exact match	Beverly Hills, CA, United StatesHQ recorded Nov 6, 2026	51-200	269 contacts →
	Exact match “The Lede Company is a full-service strategy, communications and social impact consulting firm, specializing in corporate, entertainment, brand and nonprofit sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Kreab Worldwide	Exact match	Norrmalm, SwedenHQ recorded Nov 6, 2026	501-1,000	247 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Richard Attias & Associates	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	51-200	241 contacts →
	Exact match “OUR VISION: To empower governments, corporations and civil society to lead, inspire, and drive impact on a global scale.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Tinkle	Exact match	Madrid, SpainHQ recorded Nov 6, 2026	201-500	241 contacts →
	Exact match “Expertos en comunicación cualitativa supra-especializada en corporativo, financiero, de marca, de reputación, de situaciones especiales, de ESG y workplace culture.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	LPM Comunicação	Exact match	Lisbon, PortugalHQ recorded Nov 6, 2026	51-200	240 contacts →
	Exact match “LPM is the leading Communication and Public Relations consultancy in Portugal.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Moshi Moshi	Exact match	Bangalore, IndiaHQ recorded Nov 6, 2026	51-200	239 contacts →
	Exact match “We are not just an ad agency or a creative agency, we are a Communication Company.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Alchemist Marketing & Talent Solutions	Exact match	Mumbai, IndiaHQ recorded Nov 6, 2026	201-500	238 contacts →
	Exact match “Alchemist is one of the largest independent communications agency, offering integrated communication solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Kaizzen	Exact match	Delhi, IndiaHQ recorded Nov 6, 2026	51-200	234 contacts →
	Exact match “An integrated communications agency, Kaizzen, has won the top spot as one of the fastest growing PR Agency globally for the last 4 years, as per the PRovoke Global PR Agency…” Recorded in the RevenueBase company graph · Nov 6, 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 communication strategy 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 24,810 internal communication strategy firms worldwide

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Internal communication strategy firms worldwide at a glance

As of Nov 6, 2026

24.8%Verified-email coverage

6.3Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

20,198

11-50

3,973

51-200

457

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

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.
Coverage: Every country. Country and city lists for internal communication strategy firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “internal communication strategy 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. 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 38,887 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 November 6, 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 communication strategy firms by location

142 lists · largest first

Every Internal communication strategy firms 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 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 communication strategy firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many internal communication strategy firms are there worldwide?

RevenueBase identified 24,810 company matches for internal communication strategy firms worldwide as of November 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?

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

Which country has the most internal communication strategy firms?

The United States leads with 4,247 companies, followed by France (1,810) and Brazil (1,698). Every internal communication strategy firms list by country and city is linked on this page.

Which city has the most internal communication strategy firms?

London leads with 544 company records, followed by Sao Paulo (512) and Paris (452).

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 38,887 professional contacts with verified work emails tracked across these 24,810 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 November 6, 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.