Company lists · Data refreshed September 2026

Top 25 Cloud communications companies based in the United States

Name: Cloud communications companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 820 companies tracked

RevenueBase identified 820 cloud communications companies headquartered in the United States as of September 2026 and tracks 232,221 professional contacts across them, including 38,389 with verified work emails. New York is the largest hub.

This list covers cloud communications companies 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 14, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review

820Companies

232,221Contacts tracked

38,389Verified emails

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The 25 largest cloud communications companies based in the United States

Ranked by team size

Top 25 of 820 cloud communications companies based in the United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to cloud communications 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	Amazon WEB Services AWS	Partial evidence	Seattle, WA, United StatesHQ checked Sep 14, 2026	10001+	156,457 contacts →
	Partial evidence “Launched in 2006, Amazon Web Services (AWS) began exposing key infrastructure services to businesses in the form of web services - now widely known as cloud computing.” Source: RevenueBase Database · checked Sep 14, 2026
2	Lumen Technologies	Indirect evidence	Monroe, LA, United StatesHQ checked Sep 14, 2026	10001+	15,336 contacts →
	Indirect evidence “Lumen is the trusted network for the AI-powered world, connecting people, data, and applications through one of the world’s most expansive fiber networks.” Source: RevenueBase Database · checked Sep 14, 2026
3	AVAYA	Indirect evidence	Morristown, NJ, United StatesHQ checked Sep 14, 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 14, 2026
4	ZOOM	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 14, 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 14, 2026
5	Ringcentral	Indirect evidence	Belmont, CA, United StatesHQ checked Sep 14, 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 14, 2026
6	Vonage	Partial evidence	Holmdel, NJ, United StatesHQ checked Sep 14, 2026	1,001-5,000	3,429 contacts →
	Partial evidence “We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead.” Source: RevenueBase Database · checked Sep 14, 2026
7	Spectrum Business	Indirect evidence	Stamford, CT, United StatesHQ checked Sep 14, 2026	10001+	3,044 contacts →
	Indirect evidence “Our story starts with understanding that connectivity powers everything you do, and we make it stronger.” Source: RevenueBase Database · checked Sep 14, 2026
8	GOTO	Strong evidence	Boston, MA, United StatesHQ checked Sep 14, 2026	1,001-5,000	2,320 contacts →
	Strong 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 14, 2026
9	Polycom	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 14, 2026	1,001-5,000	1,787 contacts →
	Indirect evidence “Plantronics and Polycom are now Poly.” Source: RevenueBase Database · checked Sep 14, 2026
10	Intermedia Intelligent Communications	Strong evidence	Sunnyvale, CA, United StatesHQ checked Sep 14, 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 14, 2026
11	Integra	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 14, 2026	501-1,000	1,133 contacts →
	Indirect evidence “Integra is Allstream.” Source: RevenueBase Database · checked Sep 14, 2026
12	TW Telecom	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 14, 2026	10001+	1,051 contacts →
	Indirect evidence “tw telecom is now part of CenturyLink.” Source: RevenueBase Database · checked Sep 14, 2026
13	Alianza	Partial evidence	Pleasant Grove, UT, United StatesHQ checked Sep 14, 2026	501-1,000	606 contacts →
	Partial evidence “Empowering service provider growth with the world’s most trusted Intelligent Communications Fabric.” Source: RevenueBase Database · checked Sep 14, 2026
14	Ooma, INC	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 14, 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 14, 2026
15	Masergy	Partial evidence	Plano, TX, United StatesHQ checked Sep 14, 2026	501-1,000	480 contacts →
	Partial evidence “As a pioneer in software-defined networking, Masergy is a leading secure cloud networking platform for global businesses.” Source: RevenueBase Database · checked Sep 14, 2026
16	Momentum	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 14, 2026	501-1,000	437 contacts →
	Partial evidence “We unleash human momentum with collaboration, connectivity, and communications technology.” Source: RevenueBase Database · checked Sep 14, 2026
17	Spectrumvoip	Indirect evidence	Plano, TX, United StatesHQ checked Sep 14, 2026	201-500	435 contacts →
	Indirect evidence “Family owned and proudly based in Plano, Texas, SpectrumVoIP has kept businesses talking and thriving since 2007.” Source: RevenueBase Database · checked Sep 14, 2026
18	Fusion Connect	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 14, 2026	201-500	425 contacts →
	Strong evidence “Fusion Connect, an industry leading cloud communications provider, removes complexity so customers can focus on running their business.” Source: RevenueBase Database · checked Sep 14, 2026
19	SKYPE	Indirect evidence	Redmond, WA, United StatesHQ checked Sep 14, 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 14, 2026
20	Serenova	Partial evidence	Austin, TX, United StatesHQ checked Sep 14, 2026	201-500	401 contacts →
	Partial evidence “Lifesize delivers immersive communication experiences for the global enterprise.” Source: RevenueBase Database · checked Sep 14, 2026
21	phone.com	Strong evidence	New York, NY, United StatesHQ checked Sep 14, 2026	201-500	398 contacts →
	Strong 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 14, 2026
22	INAP	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 14, 2026	51-200	334 contacts →
	Partial evidence “Internap Holding LLC (INAP) is a global provider of performance-driven, secure hybrid infrastructure solutions, enabling technology leaders to simplify their cloud journeys and…” Source: RevenueBase Database · checked Sep 14, 2026
23	BCM ONE	Partial evidence	New York, NY, United StatesHQ checked Sep 14, 2026	501-1,000	308 contacts →
	Partial evidence “Founded in 1992, BCM One is a corporate communications company that powers business connectivity for organizations ranging from SMBs to global enterprises.” Source: RevenueBase Database · checked Sep 14, 2026
24	Ultatel	Strong evidence	Herndon, VA, United StatesHQ checked Sep 14, 2026	51-200	285 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 14, 2026
25	Bluejeans By Verizon	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 14, 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 14, 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: cloud communications 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 cloud communications companies.
Partial evidence: Its own public description names part of cloud communications companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud communications 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 820 cloud communications companies based in the United States

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Cloud communications companies based in the United States at a glance

As of Sep 14, 2026

16.5%Verified-email coverage

283.2Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · New York

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

273

11-50

330

51-200

141

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 820 companies.

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 cloud communications 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “cloud communications 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 cloud communications 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 cloud communications companies, 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, 38,389 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 14, 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 cloud communications 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 cloud communications companies are there based in the United States?

RevenueBase identified 820 cloud communications companies 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?

Amazon WEB Services AWS, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most cloud communications companies?

New York leads with 24 headquartered companies, followed by Atlanta (21) and Austin (21).

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 38,389 verified decision-maker contacts tracked across these 820 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 14, 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.