Company lists · Data refreshed September 2026

Top 25 Unified communications platforms based in the United States

RevenueBase identified 624 company matches for unified communications platforms associated with the United States as of September 2026 and tracks 52,662 professional contacts across them, including 16,818 with verified work emails and 13,612 with mobile numbers. New York is the largest hub.

This list covers company matches for unified 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 6, 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 6, 2026 How this list was built
624Companies
52,662Contacts tracked
16,818Verified emails
13,612Mobile numbers
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The 25 largest unified communications platforms based in the United States

Ranked by team size
Top 25 of 624 company matches for unified communications platforms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 6, 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 6, 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 6, 2026 · View company records in RevenueBase
2Exact matchSan Jose, CA, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
3Exact matchBelmont, CA, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
4Exact matchHolmdel, NJ, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
5Exact matchBoston, MA, United StatesHQ recorded Sep 6, 20261,001-5,0002,320 contacts →

Exact match

“As the leader in cloud communications and IT, GoTo addresses real-world challenges with practical innovations and a customer-first mindset.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
6Exact matchSan Jose, CA, United StatesHQ recorded Sep 6, 20261,001-5,0001,787 contacts →

Exact match

“Plantronics and Polycom are now Poly.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
7Exact matchSunnyvale, CA, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
8Exact matchVancouver, WA, United StatesHQ recorded Sep 6, 2026501-1,0001,133 contacts →

Exact match

“Integra is Allstream.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
9Exact matchRaleigh, NC, United StatesHQ recorded Sep 6, 20261,001-5,0001,128 contacts →

Exact match

“Bandwidth is the universal communications platform that simplifies how businesses deliver integrated global experiences.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
10Exact matchPleasant Grove, UT, United StatesHQ recorded Sep 6, 2026501-1,000606 contacts →

Exact match

“Empowering service provider growth with the world’s most trusted Intelligent Communications Fabric.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
11Exact matchSunnyvale, CA, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
12Exact matchAtlanta, GA, United StatesHQ recorded Sep 6, 2026501-1,000437 contacts →

Exact match

“We unleash human momentum with collaboration, connectivity, and communications technology.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
13Exact matchAtlanta, GA, United StatesHQ recorded Sep 6, 2026201-500425 contacts →

Exact match

“Fusion Connect, an industry leading cloud communications provider, removes complexity so customers can focus on running their business.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
14Exact matchRedmond, WA, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
15Exact matchAustin, TX, United StatesHQ recorded Sep 6, 2026201-500401 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
16Exact matchNew York, NY, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
17Exact matchTacoma, WA, United StatesHQ recorded Sep 6, 2026201-500366 contacts →

Exact match

“With three decades of expertise in the enterprise communications space, Continuant stands out as a seasoned Managed Services Provider, Systems Integrator, and Technology…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
18Exact matchHerndon, VA, United StatesHQ recorded Sep 6, 202651-200285 contacts →

Exact match

“Ultatel delivers a powerful yet easy-to-use cloud communications suite that scales with your business-combining voice, SMS, chat, video, online fax, and contact center…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
19Exact matchSan Jose, CA, United StatesHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
20Exact matchGaithersburg, MD, United StatesHQ recorded Sep 6, 20261,001-5,000252 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
21Exact matchParsippany, NJ, United StatesHQ recorded Sep 6, 2026201-500241 contacts →

Exact match

“A leading cloud-optimized solutions provider for real-time communications media, applications, and infrastructure.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
22Exact matchSouth Jordan, UT, United StatesHQ recorded Sep 6, 2026201-500226 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
23Exact matchRichmond, VA, United StatesHQ recorded Sep 6, 20261,001-5,000226 contacts →

Exact match

“Whitlock has merged with AVI-SPL to provide digital workplace technology and services to organizations locally and around the world.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
24Exact matchSouth Plainfield, NJ, United StatesHQ recorded Sep 6, 202651-200212 contacts →

Exact match

“Communication is the backbone of every business.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
25Exact matchLas Vegas, NV, United StatesHQ recorded Sep 6, 2026201-500203 contacts →

Exact match

“NUWAVE Communications is a leading provider of innovative telecommunications solutions.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase

Showing 25 of 624 unified communications platforms based in the United States

See the full list, filter by size, metro and specialty, and access 16,818 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Unified communications platforms based in the United States at a glance

As of Sep 6, 2026
31.9%Verified-email coverage
25.8%Mobile-number coverage
84.4Average contacts per company
11-50Median size (employees)
3.7%Largest-city concentration · New York
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
225
11-50
251
51-200
84
201-500
34
501-1,000
11
1,001-5,000
11
5,001-10,000
5
10001+
3

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 “unified 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 16,818 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 6, 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 “unified communications platforms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 624 company matches for unified 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 unified communications platforms?

New York leads with 23 company records, followed by Austin (15) and Houston (13).

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 16,818 professional contacts with verified work emails tracked across these 624 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 6, 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.