Company lists · Data refreshed September 2026

Top 25 Business communications platforms based in the United States

RevenueBase identified 339 company matches for business communications platforms associated with the United States as of September 2026 and tracks 43,890 professional contacts across them, including 12,356 with verified work emails. San Francisco is the largest hub.

This list covers company matches for business communications platforms associated with the United States, 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 September 27, 2026.

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 Sep 27, 2026 How this list was built
339Companies
43,890Contacts tracked
12,356Verified emails
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The 25 largest business communications platforms based in the United States

Ranked by team size
Top 25 of 339 company matches for business communications platforms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMorristown, NJ, United StatesHQ recorded Sep 27, 20265,001-10,00010,510 contacts →

Exact match

“At Avaya, we give our customers the freedom to take their business in the directions that benefit them most.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 20265,001-10,0009,706 contacts →

Exact match

“Bring teams together, reimagine workspaces, engage new audiences, and delight your customers –– all on the Zoom AI-first work platform you know and love.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchBelmont, CA, United StatesHQ recorded Sep 27, 20265,001-10,0006,431 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchHolmdel, NJ, United StatesHQ recorded Sep 27, 20261,001-5,0003,429 contacts →

Exact match

“We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 20261,001-5,0002,619 contacts →

Exact match

“Slack is on a mission to make people's working lives simpler, more pleasant and more productive.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchSunnyvale, CA, United StatesHQ recorded Sep 27, 20261,001-5,0001,254 contacts →

Exact match

“Intermedia is the cloud communications company that helps over businesses connect better, from wherever, through our AI-powered platform that includes voice, video conferencing…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchRaleigh, NC, United StatesHQ recorded Sep 27, 20261,001-5,0001,103 contacts →

Exact match

“There is a better way to work.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchSunnyvale, CA, United StatesHQ recorded Sep 27, 2026501-1,000606 contacts →

Exact match

“Ooma delivers phone, messaging, video and advanced communications services that are easy to implement and provide great value.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchRedmond, WA, United StatesHQ recorded Sep 27, 202610001+423 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchAustin, TX, United StatesHQ recorded Sep 27, 2026201-500401 contacts →

Exact match

“Lifesize delivers immersive communication experiences for the global enterprise.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchNew York, NY, United StatesHQ recorded Sep 27, 2026201-500398 contacts →

Exact match

“Founded in 2008 by veteran telecommunication entrepreneurs, Phone.com provides over businesses with comprehensive, flexible, and reliable cloud-based communication and…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 2026501-1,000264 contacts →

Exact match

“Please be advised that BlueJeans by Verizon is being sunset, concluding in the first half of 2024.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchAlpharetta, GA, United StatesHQ recorded Sep 27, 202651-200237 contacts →

Exact match

“We solve a critical gap businesses face with employee to client communication, over voice and messaging.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchSouth Plainfield, NJ, United StatesHQ recorded Sep 27, 202651-200212 contacts →

Exact match

“Communication is the backbone of every business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15Exact matchTempe, AZ, United StatesHQ recorded Sep 27, 2026201-500175 contacts →

Exact match

“Vertical Communications is a leading provider of communications platforms and applications that enable critical business workflows for enterprises across a variety of industries…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16Exact matchFairlawn, OH, United StatesHQ recorded Sep 27, 202651-200174 contacts →

Exact match

“FirstComm delivers smarter business communications and IT solutions that help organizations connect, collaborate, and scale with confidence.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17Exact matchNew York, NY, United StatesHQ recorded Sep 27, 2026501-1,000168 contacts →

Exact match

“InVision is the visual collaboration platform powering the world’s smartest companies.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18Exact matchAustin, TX, United StatesHQ recorded Sep 27, 2026501-1,000164 contacts →

Exact match

“Jive is the leading provider of modern communication and collaboration solutions for business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19Exact matchSunnyvale, CA, United StatesHQ recorded Sep 27, 202651-200159 contacts →

Exact match

“Zultys is a premier provider of omnichannel, Unified Communications, hosted business phone services and premise-based communications systems.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20Exact matchSan Francisco, CA, United StatesHQ recorded Sep 27, 202651-200146 contacts →

Exact match

“We're bringing video messaging to work and empowering everyone to communicate more effectively, wherever they are.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21Exact matchSan Jose, CA, United StatesHQ recorded Sep 27, 202651-200126 contacts →

Exact match

“PanTerra is a business-class Unified Cloud Service Provider, seamlessly delivering unified communications, team collaboration, call center, file sync & share, and business…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22Exact matchMorristown, NJ, United StatesHQ recorded Sep 27, 202611-50108 contacts →

Exact match

“TeleCloud delivers modern Unified Communications, VoIP, and AI-powered communication solutions, paired with the personal, local service businesses deserve.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23Exact matchBoston, MA, United StatesHQ recorded Sep 27, 2026501-1,000103 contacts →

Exact match

“Fuze is a global cloud communications and collaboration software platform for the enterprise that was acquired by 8x8.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24Exact matchSarasota, FL, United StatesHQ recorded Sep 27, 2026201-500103 contacts →

Exact match

“Founded in 2006 in Sarasota, Florida, Star2Star Communications delivers the World's Leading Hybrid Cloud Communications Solution.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
25Exact matchPlainsboro, NJ, United StatesHQ recorded Sep 27, 202651-20091 contacts →

Exact match

“Alliance Global is a cloud-based business phone system provider exclusively for organizations that require professional communication features.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 25 of 339 business communications platforms based in the United States

See the full list, filter by size, metro and specialty, and access 12,356 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Business communications platforms based in the United States at a glance

As of Sep 27, 2026
28.2%Verified-email coverage
129.5Average contacts per company
11-50Median size (employees)
3.8%Largest-city concentration · San Francisco
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
119
11-50
131
51-200
52
201-500
17
501-1,000
6
1,001-5,000
6
5,001-10,000
5
10001+
2

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 339 companies.

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.
What qualifies
Company records associated with the United States whose business descriptions match “business communications platforms” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 12,356 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 September 27, 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.

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 “business communications platforms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many business communications platforms are there based in the United States?

RevenueBase identified 339 company matches for business communications platforms associated with the United States as of September 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?

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

Which city has the most business communications platforms?

San Francisco leads with 13 company records, followed by Austin (10) and Miami (10).

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 12,356 professional contacts with verified work emails tracked across these 339 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 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 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.