Company lists · Data refreshed September 2026

Top 25 Business communication software companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 1,158 companies tracked

RevenueBase identified 1,158 business communication software companies worldwide as of September 2026 and tracks 60,802 professional contacts across them, including 17,059 with verified work emails. The United States is the largest market and London the largest hub.

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

1,158Companies

60,802Contacts tracked

17,059Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest business communication software companies worldwide

Ranked by team size

Top 25 of 1,158 business communication software companies worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to business 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	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	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	5,001-10,000	9,706 contacts →
	Indirect 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	Ringcentral	Indirect evidence	Belmont, CA, United StatesHQ checked Sep 27, 2026	5,001-10,000	6,431 contacts →
	Indirect evidence “RingCentral, Inc.(NYSE: RNG) is a global leader in AI–powered customer engagement, delivering an integrated platform for business phone, SMS, contact center, workforce engagement…” Source: RevenueBase Database · checked Sep 27, 2026
4	MITEL	Indirect evidence	Kanata, ON, CanadaHQ checked Sep 27, 2026	1,001-5,000	3,442 contacts →
	Indirect evidence “Powering more than 2 billion connections every day, Mitel helps businesses connect, collaborate and take care of customers.” Source: RevenueBase Database · checked Sep 27, 2026
5	GOTO	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,320 contacts →
	Partial evidence “As the leader in cloud communications and IT, GoTo addresses real-world challenges with practical innovations and a customer-first mindset.” Source: RevenueBase Database · checked Sep 27, 2026
6	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
7	Intermedia Intelligent Communications	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,254 contacts →
	Partial 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
8	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
9	Full Creative	Indirect evidence	Chennai, IndiaHQ checked Sep 27, 2026	501-1,000	756 contacts →
	Indirect evidence “FULL Creative is a Portland-based product company with offices in India (Chennai), Canada (Toronto) and the United Kingdom (Edinburgh).” Source: RevenueBase Database · checked Sep 27, 2026
10	Ooma, INC	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	501-1,000	606 contacts →
	Partial evidence “Ooma delivers phone, messaging, video and advanced communications services that are easy to implement and provide great value.” Source: RevenueBase Database · checked Sep 27, 2026
11	SKYPE	Indirect evidence	Redmond, WA, United StatesHQ checked Sep 27, 2026	10001+	423 contacts →
	Indirect evidence “The next generation of Skype from Microsoft gives you better ways to chat, call, and plan fun things to do with the people in your life every day.” Source: RevenueBase Database · checked Sep 27, 2026
12	Serenova	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	201-500	401 contacts →
	Partial evidence “Lifesize delivers immersive communication experiences for the global enterprise.” Source: RevenueBase Database · checked Sep 27, 2026
13	Cybozu, INC	Indirect evidence	東京都中央区, JapanHQ checked Sep 27, 2026	501-1,000	348 contacts →
	Indirect evidence “At Cybozu, our mission is to build a society brimming with teamwork.” Source: RevenueBase Database · checked Sep 27, 2026
14	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
15	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
16	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
17	Symbio	Partial evidence	Sydney, AustraliaHQ checked Sep 27, 2026	201-500	310 contacts →
	Partial evidence “Symbio is a software company changing the way the world communicates.” Source: RevenueBase Database · checked Sep 27, 2026
18	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
19	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
20	Broadsoft	Strong evidence	Gaithersburg, MD, United StatesHQ checked Sep 27, 2026	1,001-5,000	252 contacts →
	Strong evidence “BroadSoft, now part of Cisco, is the leading provider of software and services that enable mobile, fixed-line and cable service providers to offer Unified Communications over…” Source: RevenueBase Database · checked Sep 27, 2026
21	Dialogic	Partial evidence	Parsippany, NJ, United StatesHQ checked Sep 27, 2026	201-500	241 contacts →
	Partial evidence “A leading cloud-optimized solutions provider for real-time communications media, applications, and infrastructure.” Source: RevenueBase Database · checked Sep 27, 2026
22	Movius	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 27, 2026	51-200	237 contacts →
	Partial evidence “We solve a critical gap businesses face with employee to client communication, over voice and messaging.” Source: RevenueBase Database · checked Sep 27, 2026
23	Calltower	Partial evidence	South Jordan, UT, United StatesHQ checked Sep 27, 2026	201-500	226 contacts →
	Partial evidence “Since 2002, CallTower has been at the forefront of transforming global communication, emerging as a leader in enterprise-class cloud communication, collaboration, and CX solutions.” Source: RevenueBase Database · checked Sep 27, 2026
24	Vitel Global	Partial evidence	South Plainfield, NJ, United StatesHQ checked Sep 27, 2026	51-200	212 contacts →
	Partial evidence “Communication is the backbone of every business.” Source: RevenueBase Database · checked Sep 27, 2026
25	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

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: business 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 business communication software companies.
Partial evidence: Its own public description names part of business 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 business 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 1,158 business communication software companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 17,059 reachable decision-makers.

Free signup · no credit card

View the full list →

Business communication software companies worldwide at a glance

As of Sep 27, 2026

28.1%Verified-email coverage

52.5Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

408

11-50

446

51-200

169

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 business 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: Every country. Country and city lists for business communication software companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “business 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 business 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 business 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, 17,059 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.

Business communication software companies by location

8 lists · largest first

Every Business 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 business 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 business communication software companies are there worldwide?

RevenueBase identified 1,158 business 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?

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

Which country has the most business communication software companies?

The United States leads with 271 companies, followed by India (90) and the United Kingdom (68). Every business communication software companies list by country and city is linked on this page.

Which city has the most business communication software companies?

London leads with 24 headquartered companies, followed by Singapore (14) and Sao Paulo (11).

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 17,059 verified decision-maker contacts tracked across these 1,158 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.

Ready to reach these companies? Verified emails and direct dials for all 1,158 business communication software companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.