Company lists · Data refreshed September 2026

Top 25 Enterprise communication platform providers based in the United States

Name: Enterprise communication platform providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 314 companies tracked

RevenueBase identified 314 enterprise communication platform providers headquartered in the United States as of September 2026 and tracks 26,743 professional contacts across them, including 7,778 with verified work emails and 6,643 with mobile numbers. San Francisco is the largest hub.

This list covers enterprise communication platform providers headquartered in the United States, 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 2, 2026.

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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

314Companies

26,743Contacts tracked

7,778Verified emails

6,643Mobile numbers

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The 25 largest enterprise communication platform providers based in the United States

Ranked by team size

Top 25 of 314 enterprise communication platform providers based in the United States, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise communication platform providers: 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	ZOOM	Partial evidence	Overland Park, KS, United States	5,001-10,000	9,821 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 2, 2026
2	SLACK	Indirect evidence	San Francisco, CA, United States	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 2, 2026
3	GOTO	Partial evidence	Boston, MA, United States	1,001-5,000	2,325 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 2, 2026
4	Polycom	Indirect evidence	Andover, MA, United States	1,001-5,000	1,783 contacts →
	Indirect evidence “Plantronics and Polycom are now Poly.” Source: RevenueBase Database · checked Sep 2, 2026
5	Intermedia Intelligent Communications	Strong evidence	Sunnyvale, CA, United States	1,001-5,000	1,251 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 2, 2026
6	Ooma, INC	Partial evidence	Sunnyvale, CA, United States	501-1,000	604 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 2, 2026
7	SKYPE	Indirect evidence	Redmond, WA, United States	10001+	437 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 2, 2026
8	phone.com	Partial evidence	Poway, CA, United States	201-500	396 contacts →
	Partial evidence “Founded in 2008 by veteran telecommunication entrepreneurs, Phone.com provides over businesses with comprehensive, flexible, and reliable cloud-based communication and…” Source: RevenueBase Database · checked Sep 2, 2026
9	Wildix	Partial evidence	Columbus, OH, United States	201-500	337 contacts →
	Partial evidence “The First Sales-Oriented Unified Communications Solution Your communications system can either boost your revenue or create bottlenecks that slow your business down.” Source: RevenueBase Database · checked Sep 2, 2026
10	GPA	Indirect evidence	Glen Ellyn, IL, United States	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 2, 2026
11	ZOOM	Partial evidence	San Jose, CA, United States	5,001-10,000	288 contacts →
	Partial evidence “Bring teams together, reimagine workspaces, engage new audiences, and delight your customers –– all on the Zoom platform you know and love.” Source: RevenueBase Database · checked Sep 2, 2026
12	Bluejeans By Verizon	Indirect evidence	San Jose, CA, United States	501-1,000	266 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 2, 2026
13	Broadsoft	Partial evidence	Gaithersburg, MD, United States	1,001-5,000	251 contacts →
	Partial 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 2, 2026
14	Vitel Global	Partial evidence	South Plainfield, NJ, United States	51-200	208 contacts →
	Partial evidence “Communication is the backbone of every business.” Source: RevenueBase Database · checked Sep 2, 2026
15	Voximplant	Partial evidence	Palo Alto, CA, United States	201-500	192 contacts →
	Partial evidence “Voximplant versatile cloud platform enables business to bring interaction to a different level.” Source: RevenueBase Database · checked Sep 2, 2026
16	rocket.chat	Strong evidence	Wilmington, DE, United States	51-200	189 contacts →
	Strong evidence “Rocket.Chat Secure CommsOS® is a communication platform that unifies messaging, voice, video, AI, and mission-critical applications-ensuring uncompromising security, compliance…” Source: RevenueBase Database · checked Sep 2, 2026
17	Vertical Communications	Strong evidence	Tempe, AZ, United States	201-500	174 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 2, 2026
18	Jive Software	Partial evidence	Austin, TX, United States	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 2, 2026
19	Mattermost	Partial evidence	Palo Alto, CA, United States	51-200	149 contacts →
	Partial evidence “Mattermost is the leading collaboration platform for mission-critical work.” Source: RevenueBase Database · checked Sep 2, 2026
20	LOOM	Indirect evidence	San Francisco, CA, United States	51-200	143 contacts →
	Indirect evidence “We're bringing video messaging to work and empowering everyone to communicate more effectively, wherever they are.” Source: RevenueBase Database · checked Sep 2, 2026
21	Smash Solutions	Indirect evidence	South Jordan, UT, United States	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 2, 2026
22	Convex Interactive	Indirect evidence	Houston, TX, United States	51-200	140 contacts →
	Indirect evidence “Founded in 2012, Convex Interactive is a leading IT solutions provider registered in Pakistan, UAE, & USA.” Source: RevenueBase Database · checked Sep 2, 2026
23	OWL Labs	Indirect evidence	Boston, MA, United States	51-200	131 contacts →
	Indirect evidence “Revolutionizing the way the world works Creators of the award-winning Meeting Owl” Source: RevenueBase Database · checked Sep 2, 2026
24	Panterra Networks	Partial evidence	San Jose, CA, United States	51-200	128 contacts →
	Partial evidence “PanTerra is a business-class Unified Cloud Service Provider, seamlessly delivering unified communications, team collaboration, call center, file sync & share, and business…” Source: RevenueBase Database · checked Sep 2, 2026
25	Lifesize	Indirect evidence	Austin, TX, United States	201-500	122 contacts →
	Indirect evidence “Lifesize, Inc, recently acquired by Enghouse Systems is now part of the Enghouse Interactive Management Group.” Source: RevenueBase Database · checked Sep 2, 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: enterprise communication platform providers. 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 enterprise communication platform providers.
Partial evidence: Its own public description names part of enterprise communication platform providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise communication platform providers. 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 314 enterprise communication platform providers based in the United States

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Enterprise communication platform providers based in the United States at a glance

As of Sep 2, 2026

29.1%Verified-email coverage

24.8%Mobile-number coverage

85.2Average contacts per company

11-50Median size (employees)

4.5%Largest-city concentration · San Francisco

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

11-50

124

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 enterprise communication platform providers, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “enterprise communication platform providers”. 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 enterprise communication platform providers), 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 enterprise communication platform providers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 7,778 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 2, 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.

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 enterprise communication platform providers, 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 enterprise communication platform providers are there based in the United States?

RevenueBase identified 314 enterprise communication platform providers headquartered in the United States 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?

ZOOM, headquartered in Overland Park, tops this list with the largest team on record.

Which city has the most enterprise communication platform providers?

San Francisco leads with 14 headquartered companies, followed by Austin (12) and Wilmington (9).

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 7,778 verified decision-maker contacts tracked across these 314 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 2, 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.