Company lists · Data refreshed September 2026

Top 25 Cloud telephony providers based in the United States

Name: Cloud telephony 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 27, 2026 850 companies tracked

RevenueBase identified 850 cloud telephony providers headquartered in the United States as of September 2026 and tracks 18,102 professional contacts across them, including 6,284 with verified work emails. New York is the largest hub.

This list covers cloud telephony 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 27, 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 27, 2026 86% judged on-target in blind review

850Companies

18,102Contacts tracked

6,284Verified emails

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The 25 largest cloud telephony providers based in the United States

Ranked by team size

Top 25 of 850 cloud telephony providers based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to cloud telephony 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	Vonage	Indirect evidence	Holmdel, NJ, United StatesHQ checked Sep 27, 2026	1,001-5,000	3,429 contacts →
	Indirect evidence “We’re making communications more flexible, intelligent, and personal, to help enterprises the world over stay ahead.” Source: RevenueBase Database · checked Sep 27, 2026
2	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
3	Ooma, INC	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	501-1,000	606 contacts →
	Indirect 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
4	Spectrumvoip	Indirect evidence	Plano, TX, United StatesHQ checked Sep 27, 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 27, 2026
5	phone.com	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	398 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 27, 2026
6	Ultatel	Partial evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	51-200	285 contacts →
	Partial 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 27, 2026
7	TCN	Indirect evidence	St. George, UT, United StatesHQ checked Sep 27, 2026	201-500	246 contacts →
	Indirect evidence “A leader in the hosted contact center technology industry since TCN, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
8	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
9	Vail Systems	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	51-200	214 contacts →
	Indirect evidence “For over thirty years, Fortune 500 companies in financial services, retail and hospitality, software, and wireless communications industries have relied on Vail Systems’…” Source: RevenueBase Database · checked Sep 27, 2026
10	Vitel Global	Indirect evidence	South Plainfield, NJ, United StatesHQ checked Sep 27, 2026	51-200	212 contacts →
	Indirect evidence “Communication is the backbone of every business.” Source: RevenueBase Database · checked Sep 27, 2026
11	Nuwave Communications, INC	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 27, 2026	201-500	203 contacts →
	Indirect evidence “NUWAVE Communications is a leading provider of innovative telecommunications solutions.” Source: RevenueBase Database · checked Sep 27, 2026
12	Voximplant	Partial evidence	Palo Alto, CA, United StatesHQ checked Sep 27, 2026	201-500	194 contacts →
	Partial evidence “Voximplant versatile cloud platform enables business to bring interaction to a different level.” Source: RevenueBase Database · checked Sep 27, 2026
13	AVOXI	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 27, 2026	51-200	166 contacts →
	Indirect evidence “At AVOXI, we believe that voice conversations are essential for businesses to connect with customers across the globe.” Source: RevenueBase Database · checked Sep 27, 2026
14	Zultys	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	51-200	159 contacts →
	Indirect evidence “Zultys is a premier provider of omnichannel, Unified Communications, hosted business phone services and premise-based communications systems.” Source: RevenueBase Database · checked Sep 27, 2026
15	Super Technologies	Indirect evidence	Pensacola, FL, United StatesHQ checked Sep 27, 2026	11-50	150 contacts →
	Indirect evidence “Super Technologies, Inc.” Source: RevenueBase Database · checked Sep 27, 2026
16	Crexendo Business Solutions	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 27, 2026	51-200	143 contacts →
	Indirect evidence “Crexendo®, Inc.(NASDAQ:CXDO) is an award-winning premier provider of Unified Communications as a Service (UCaaS), Call Center as a Service (CCaaS), communication platform software…” Source: RevenueBase Database · checked Sep 27, 2026
17	IPCOM	Indirect evidence	Miramar, FL, United StatesHQ checked Sep 27, 2026	51-200	142 contacts →
	Indirect evidence “IPCOM Network provee Servicios Integrados Virtuales de Comunicación VoIP para reducir costos, aumentar la productividad y la inteligencia de negocios unificando soluciones de CRM…” Source: RevenueBase Database · checked Sep 27, 2026
18	Panterra Networks	Partial evidence	San Jose, CA, United StatesHQ checked Sep 27, 2026	51-200	126 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 27, 2026
19	Estech Systems, Inc. ESI	Indirect evidence	Plano, TX, United StatesHQ checked Sep 27, 2026	51-200	121 contacts →
	Indirect evidence “Founded in 1987, Estech Systems (ESI), a Crexendo® company, delivers high-performance phone systems designed for growing businesses.” Source: RevenueBase Database · checked Sep 27, 2026
20	KOL Telecom Services LLC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 27, 2026	11-50	112 contacts →
	Indirect evidence “KOL Telecom is the leading innovator of small business Voice over IP (VoIP) Phone services.” Source: RevenueBase Database · checked Sep 27, 2026
21	Telecloud	Indirect evidence	Morristown, NJ, United StatesHQ checked Sep 27, 2026	11-50	108 contacts →
	Indirect evidence “TeleCloud delivers modern Unified Communications, VoIP, and AI-powered communication solutions, paired with the personal, local service businesses deserve.” Source: RevenueBase Database · checked Sep 27, 2026
22	Peerless Network, An Infobip Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 27, 2026	51-200	107 contacts →
	Partial evidence “PEERLESS FOR ENTERPRISE: SIP Trunking: • Fast, flexible, reliable, secure, cost-effective • Fully automated SIP Channeling and Telephone Number ordering • Real-time activation of…” Source: RevenueBase Database · checked Sep 27, 2026
23	Star2star	Partial evidence	Sarasota, FL, United StatesHQ checked Sep 27, 2026	201-500	103 contacts →
	Partial evidence “Founded in 2006 in Sarasota, Florida, Star2Star Communications delivers the World's Leading Hybrid Cloud Communications Solution.” Source: RevenueBase Database · checked Sep 27, 2026
24	Alliance Global Communications LLC	Partial evidence	Plainsboro, NJ, United StatesHQ checked Sep 27, 2026	51-200	91 contacts →
	Partial evidence “Alliance Global is a cloud-based business phone system provider exclusively for organizations that require professional communication features.” Source: RevenueBase Database · checked Sep 27, 2026
25	NUSO	Partial evidence	Clayton, MO, United StatesHQ checked Sep 27, 2026	51-200	90 contacts →
	Partial evidence “NUSO is a fast-growing and innovative communication focused Cloud services company.” 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: cloud telephony 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 cloud telephony providers.
Partial evidence: Its own public description names part of cloud telephony providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cloud telephony 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 850 cloud telephony providers based in the United States

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Cloud telephony providers based in the United States at a glance

As of Sep 27, 2026

34.7%Verified-email coverage

21.3Average contacts per company

11-50Median size (employees)

3.3%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

328

11-50

369

51-200

114

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 850 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 telephony 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 “cloud telephony 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 cloud telephony 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 cloud telephony 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, 6,284 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.

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 telephony 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 cloud telephony providers are there based in the United States?

RevenueBase identified 850 cloud telephony 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?

Vonage, headquartered in Holmdel, tops this list with the largest team on record.

Which city has the most cloud telephony providers?

New York leads with 28 headquartered companies, followed by Miami (20) and Austin (15).

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 6,284 verified decision-maker contacts tracked across these 850 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.

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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.