Company lists · Data refreshed September 2026

Top 25 Corporate communications platforms worldwide

Name: Corporate communications platforms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 1,199 companies tracked

RevenueBase identified 1,199 corporate communications platforms worldwide as of September 2026 and tracks 39,958 professional contacts across them, including 9,496 with verified work emails. The United States is the largest market and London the largest hub.

This list covers corporate communications platforms 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 27, 2026. Country and city lists for corporate communications platforms 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 27, 2026 86% judged on-target in blind review

1,199Companies

39,958Contacts tracked

9,496Verified emails

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The 25 largest corporate communications platforms worldwide

Ranked by team size

Top 25 of 1,199 corporate communications platforms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to corporate communications platforms: 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	AVAYA	Indirect evidence	Morristown, NJ, United StatesHQ checked Sep 27, 2026	5,001-10,000	10,510 contacts →
	Indirect evidence “At Avaya, we give our customers the freedom to take their business in the directions that benefit them most.” Source: RevenueBase Database · checked Sep 27, 2026
2	ZOOM	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	5,001-10,000	9,706 contacts →
	Partial evidence “Bring teams together, reimagine workspaces, engage new audiences, and delight your customers –– all on the Zoom AI-first work platform you know and love.” Source: RevenueBase Database · checked Sep 27, 2026
3	Polycom	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,787 contacts →
	Indirect evidence “Plantronics and Polycom are now Poly.” Source: RevenueBase Database · checked Sep 27, 2026
4	Intermedia Intelligent Communications	Strong evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,254 contacts →
	Strong evidence “Intermedia is the cloud communications company that helps over businesses connect better, from wherever, through our AI-powered platform that includes voice, video conferencing…” Source: RevenueBase Database · checked Sep 27, 2026
5	Yealink	Partial evidence	Xiamen, ChinaHQ checked Sep 27, 2026	1,001-5,000	773 contacts →
	Partial evidence “Yealink (Stock Code: 300628) is a global brand that specializes in video conferencing, voice communications and collaboration solutions with best-in-class quality, innovative…” Source: RevenueBase Database · checked Sep 27, 2026
6	Workshop	Strong evidence	Omaha, NE, United StatesHQ checked Sep 27, 2026	51-200	447 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 27, 2026
7	SESOL	Indirect evidence	Jönköping, SwedenHQ checked Sep 27, 2026	501-1,000	335 contacts →
	Indirect evidence “Sesol är nu en del av Soltech-koncernen.” Source: RevenueBase Database · checked Sep 27, 2026
8	Wildix	Partial evidence	Tallinn, EstoniaHQ checked Sep 27, 2026	201-500	334 contacts →
	Partial evidence “The First Sales-Oriented Unified Communications Solution, now powered by AI Wildix develops secure, AI-powered business communication solutions designed to support revenue growth…” Source: RevenueBase Database · checked Sep 27, 2026
9	Myoffice	Partial evidence	Moscow, RussiaHQ checked Sep 27, 2026	501-1,000	326 contacts →
	Partial evidence “MyOffice offers secure office solutions for communications and teamwork.” Source: RevenueBase Database · checked Sep 27, 2026
10	GPA	Indirect evidence	Breukelen, United StatesHQ checked Sep 27, 2026	5,001-10,000	316 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 27, 2026
11	Dmc, A Division Of Evolution Group	Indirect evidence	East London, South AfricaHQ checked Sep 27, 2026	n/a	311 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
12	Bluejeans By Verizon	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	501-1,000	264 contacts →
	Indirect evidence “Please be advised that BlueJeans by Verizon is being sunset, concluding in the first half of 2024.” Source: RevenueBase Database · checked Sep 27, 2026
13	Infocus	Indirect evidence	Portland, OR, United StatesHQ checked Sep 27, 2026	51-200	256 contacts →
	Indirect evidence “InFocus makes connecting people and ideas easy, reliable and affordable.” Source: RevenueBase Database · checked Sep 27, 2026
14	Whitlock	Indirect evidence	Richmond, VA, United StatesHQ checked Sep 27, 2026	1,001-5,000	226 contacts →
	Indirect evidence “Whitlock has merged with AVI-SPL to provide digital workplace technology and services to organizations locally and around the world.” Source: RevenueBase Database · checked Sep 27, 2026
15	Streamwide	Partial evidence	Paris, FranceHQ checked Sep 27, 2026	51-200	197 contacts →
	Partial evidence “A major player for 20 years in the critical communications market, STREAMWIDE has successfully developed its Team on mission (mission critical) and Team on the run (business…” Source: RevenueBase Database · checked Sep 27, 2026
16	Vertical Communications	Strong evidence	Tempe, AZ, United StatesHQ checked Sep 27, 2026	201-500	175 contacts →
	Strong evidence “Vertical Communications is a leading provider of communications platforms and applications that enable critical business workflows for enterprises across a variety of industries…” Source: RevenueBase Database · checked Sep 27, 2026
17	Jive Software	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	501-1,000	164 contacts →
	Partial evidence “Jive is the leading provider of modern communication and collaboration solutions for business.” Source: RevenueBase Database · checked Sep 27, 2026
18	Mattermost	Partial evidence	Palo Alto, CA, United StatesHQ checked Sep 27, 2026	51-200	152 contacts →
	Partial evidence “Mattermost is the leading collaboration platform for mission-critical work.” Source: RevenueBase Database · checked Sep 27, 2026
19	Dstny FR	Partial evidence	Clichy, FranceHQ checked Sep 27, 2026	501-1,000	150 contacts →
	Partial evidence “Bienvenue dans le monde des communications d’entreprises nouvelles générations : connectées, intelligentes, flexibles et sécurisées.” Source: RevenueBase Database · checked Sep 27, 2026
20	Smash Solutions	Indirect evidence	South Jordan, UT, United StatesHQ checked Sep 27, 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 27, 2026
21	Maxhub	Partial evidence	United StatesHQ checked Sep 27, 2026	1,001-5,000	139 contacts →
	Partial evidence “MAXHUB is a global provider of integrated collaboration solutions, designed to make communication and teamwork more efficient across modern workplaces.” Source: RevenueBase Database · checked Sep 27, 2026
22	Dstny BE	Partial evidence	Zaventem, BelgiumHQ checked Sep 27, 2026	201-500	131 contacts →
	Partial evidence “Dstny is a premier European provider of cloud-based business communications solutions.” Source: RevenueBase Database · checked Sep 27, 2026
23	Techgentsia	Partial evidence	Alappuzha, IndiaHQ checked Sep 27, 2026	51-200	118 contacts →
	Partial evidence “Techgentsia is a pioneering company in the field of internet communication and collaboration, established in 2009.” Source: RevenueBase Database · checked Sep 27, 2026
24	Hallvarsson & Halvarsson	Strong evidence	Stockholm, SwedenHQ checked Sep 27, 2026	51-200	116 contacts →
	Strong evidence “Hallvarsson & Halvarsson offers Sweden’s largest combined expertise in trust building corporate communications.” Source: RevenueBase Database · checked Sep 27, 2026
25	Smartspace	Indirect evidence	João Pessoa, BrazilHQ checked Sep 27, 2026	51-200	111 contacts →
	Indirect evidence “We were born from the need to transform the world!” Source: RevenueBase Database · checked Sep 27, 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: corporate communications platforms. 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 corporate communications platforms.
Partial evidence: Its own public description names part of corporate communications platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name corporate communications platforms. 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 1,199 corporate communications platforms worldwide

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Corporate communications platforms worldwide at a glance

As of Sep 27, 2026

23.8%Verified-email coverage

33.3Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

615

11-50

377

51-200

119

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 corporate communications platforms, 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 corporate communications platforms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “corporate communications platforms”. 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 corporate communications platforms), 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 corporate communications platforms, 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, 9,496 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 27, 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.

Corporate communications platforms by location

12 lists · largest first

Every Corporate communications platforms 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 corporate communications platforms, 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 corporate communications platforms are there worldwide?

RevenueBase identified 1,199 corporate communications platforms 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?

AVAYA, headquartered in Morristown, tops this list with the largest team on record.

Which country has the most corporate communications platforms?

The United States leads with 193 companies, followed by Brazil (111) and the United Kingdom (82). Every corporate communications platforms list by country and city is linked on this page.

Which city has the most corporate communications platforms?

London leads with 41 headquartered companies, followed by Sao Paulo (40) and Paris (15).

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 9,496 verified decision-maker contacts tracked across these 1,199 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 27, 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.