Company lists · Data refreshed September 2026

Top 25 Internal communication software companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 251 companies tracked

RevenueBase identified 251 internal communication software companies worldwide as of September 2026 and tracks 7,530 professional contacts across them, including 1,598 with verified work emails and 1,753 with mobile numbers. The United States is the largest market and San Francisco the largest hub.

This list covers internal communication software companies 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 4, 2026. Country and city lists for internal communication software companies 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 4, 2026 86% judged on-target in blind review

251Companies

7,530Contacts tracked

1,598Verified emails

1,753Mobile numbers

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The 25 largest internal communication software companies worldwide

Ranked by team size

Top 25 of 251 internal communication software companies worldwide, ranked by team size, largest first. Data refreshed Sep 4, 2026. RevenueBase Smart Search rates how each company's information relates to internal communication software companies: 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	SLACK	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,591 contacts →
	Indirect evidence “Slack is on a mission to make people's working lives simpler, more pleasant and more productive.” Source: RevenueBase Database · checked Sep 4, 2026
2	Staffbase	Indirect evidence	Chemnitz, GermanyHQ checked Sep 4, 2026	501-1,000	839 contacts →
	Indirect evidence “Staffbase is the first AI-native Employee Experience Platform, equipping many of the world’s leading companies with solutions to inspire every employee with motivating…” Source: RevenueBase Database · checked Sep 4, 2026
3	Humand	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	501-1,000	487 contacts →
	Strong evidence “At Humand, we empower companies to digitize their internal communication, culture, and HR processes in one unified platform, recognizing that the future of mid market and…” Source: RevenueBase Database · checked Sep 4, 2026
4	Workshop	Strong evidence	Omaha, NE, United StatesHQ checked Sep 4, 2026	51-200	426 contacts →
	Strong evidence “Workshop is a modern, purpose-built internal communications platform that helps teams create, send, manage, and measure employee communications in one place, starting with email…” Source: RevenueBase Database · checked Sep 4, 2026
5	GPA	Indirect evidence	Breukelen, IL, NetherlandsHQ checked Sep 4, 2026	5,001-10,000	317 contacts →
	Indirect evidence “GPA features the best-of-breed Regional Business Units (RBUs) in 50 countries, with localized delivery capabilities in over 150+ cities globally.” Source: RevenueBase Database · checked Sep 4, 2026
6	Interact Software	Partial evidence	Manchester, OK, United KingdomHQ checked Sep 4, 2026	201-500	246 contacts →
	Partial evidence “Interact delivers enterprise-grade intranet software to over customers and millions of employees worldwide.” Source: RevenueBase Database · checked Sep 4, 2026
7	Jive Software	Partial evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	501-1,000	165 contacts →
	Partial evidence “Jive is the leading provider of modern communication and collaboration solutions for business.” Source: RevenueBase Database · checked Sep 4, 2026
8	SMILE	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	n/a	153 contacts →
	Indirect evidence “With TextExpander, created by Smile, you can communicate smarter.” Source: RevenueBase Database · checked Sep 4, 2026
9	Smash Solutions	Indirect evidence	South Jordan, UT, United StatesHQ checked Sep 4, 2026	51-200	141 contacts →
	Indirect evidence “Smash is solution that integrates the latest innovative technological components into accessible, all-inclusive solutions that bridge each aspect of professional and personal…” Source: RevenueBase Database · checked Sep 4, 2026
10	ROI Communication	Strong evidence	Scotts Valley, CA, United StatesHQ checked Sep 4, 2026	51-200	89 contacts →
	Strong evidence “ROI Communication is a 100% employee-owned internal communications company focused on helping the world’s leading businesses achieve their very best through inspired employee…” Source: RevenueBase Database · checked Sep 4, 2026
11	SULTS	Partial evidence	Uberaba, BrazilHQ checked Sep 4, 2026	51-200	87 contacts →
	Partial evidence “SULTS has everything you need to manage communication, engage your employees, ensure the quality of your business, increase productivity and manage all day-to-day activities.” Source: RevenueBase Database · checked Sep 4, 2026
12	Axios HQ	Strong evidence	Arlington, VA, United StatesHQ checked Sep 4, 2026	51-200	83 contacts →
	Strong evidence “Axios HQ is the first internal communications management platform to equip organizations with the tools, data, and best practices to be world-class communicators.” Source: RevenueBase Database · checked Sep 4, 2026
13	C4b COM For Business AG	Strong evidence	Germering, GermanyHQ checked Sep 4, 2026	51-200	65 contacts →
	Strong evidence “With over a million installed licenses, C4B Com For Business AG is a market leader in CTI and Unified Communications software.” Source: RevenueBase Database · checked Sep 4, 2026
14	Dialog	Partial evidence	Sao Paulo, BrazilHQ checked Sep 4, 2026	51-200	58 contacts →
	Partial evidence “Somos a Dialog, plataforma líder em comunicação interna no Brasil.> 2º lugar na categoria ScaleUp no ranking de Engajamento, Performance e Cultura do 100 Open Startups 2024, sendo…” Source: RevenueBase Database · checked Sep 4, 2026
15	PIX Mídia	Partial evidence	Esteio, BrazilHQ checked Sep 4, 2026	11-50	53 contacts →
	Partial evidence “A Pix Midia desenvolve soluções para comunicação interna, para empresas que desejam otimizar a distribuição de informação numa realidade em que o tempo é escasso.” Source: RevenueBase Database · checked Sep 4, 2026
16	Axero Solutions	Partial evidence	New York, NY, United StatesHQ checked Sep 4, 2026	51-200	49 contacts →
	Partial evidence “Axero provides easy-to-use intranet software that boosts productivity, unifies your people, and helps your company thrive.” Source: RevenueBase Database · checked Sep 4, 2026
17	Politemail Software	Strong evidence	Greenland, NH, United StatesHQ checked Sep 4, 2026	11-50	43 contacts →
	Strong evidence “PoliteMail is an internal communications measurement platform for Microsoft Outlook and Office365.” Source: RevenueBase Database · checked Sep 4, 2026
18	Socialchorus	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	36 contacts →
	Indirect evidence “Agility is the greatest advantage in the modern marketplace.” Source: RevenueBase Database · checked Sep 4, 2026
19	Hubengage	Partial evidence	Cambridge, MA, United StatesHQ checked Sep 4, 2026	11-50	35 contacts →
	Partial evidence “HubEngage™ is a unified employee communications, engagement, recognition and instant messaging platform.” Source: RevenueBase Database · checked Sep 4, 2026
20	CERKL	Partial evidence	Blue Ash, OH, United StatesHQ checked Sep 4, 2026	51-200	30 contacts →
	Partial evidence “Cerkl Broadcast is the premier, forward-thinking employee communications suite.” Source: RevenueBase Database · checked Sep 4, 2026
21	Ibsystem	Partial evidence	Franca, BrazilHQ checked Sep 4, 2026	11-50	23 contacts →
	Partial evidence “Emprese de desenvolvimento de software voltados para gestão e comunicação, contamos com diversos produtos no mercado, além de novos produtos sempre em desenvolvimento para trazer…” Source: RevenueBase Database · checked Sep 4, 2026
22	Caseris Gmbh	Indirect evidence	Stolberg Rhld., GermanyHQ checked Sep 4, 2026	51-200	21 contacts →
	Indirect evidence “Herzlich Willkommen bei CASERIS!” Source: RevenueBase Database · checked Sep 4, 2026
23	PLEK	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 4, 2026	11-50	19 contacts →
	Partial evidence “Plek is a communication platform that is all about employees.” Source: RevenueBase Database · checked Sep 4, 2026
24	Screencorp	Partial evidence	Sao Paulo, BrazilHQ checked Sep 4, 2026	11-50	18 contacts →
	Partial evidence “TV Corporativa, Aplicativo de Comunicação Interna, Intranet / Rede Social Corporativa e AI Chatbot.” Source: RevenueBase Database · checked Sep 4, 2026
25	WOUB	Indirect evidence	Wateringen, NetherlandsHQ checked Sep 4, 2026	11-50	18 contacts →
	Indirect evidence “Woub, onze trots.” Source: RevenueBase Database · checked Sep 4, 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 communication software companies. 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 communication software companies.
Partial evidence: Its own public description names part of internal communication software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name internal communication software companies. 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 251 internal communication software companies worldwide

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Internal communication software companies worldwide at a glance

As of Sep 4, 2026

21.2%Verified-email coverage

23.3%Mobile-number coverage

30.0Average contacts per company

11-50Median size (employees)

7.2%Largest-city concentration · San Francisco

Sep 4, 2026Page data refreshed

Companies by employee count

1-10

112

11-50

100

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 communication software companies, 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: 5 countries, largest first: the United States, the United Kingdom, Brazil, the Netherlands, Germany. Country and city lists for internal communication software companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “internal communication software companies”. 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 communication software companies), 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 communication software companies, 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, 1,598 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 between September 4, 2026 and September 14, 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 communication software companies by location

5 lists · largest first

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

Countries

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 communication software companies, 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 communication software companies are there worldwide?

RevenueBase identified 251 internal communication software companies 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?

SLACK, headquartered in San Francisco, tops this list with the largest team on record.

Which country has the most internal communication software companies?

The United States leads with 115 companies, followed by the United Kingdom (41) and Brazil (37). Every internal communication software companies list by country and city is linked on this page.

Which city has the most internal communication software companies?

San Francisco leads with 18 headquartered companies, followed by London (15) and Sao Paulo (14).

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 1,598 verified decision-maker contacts tracked across these 251 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 4, 2026 and September 14, 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.