Company lists · Data refreshed November 2026

Top 25 Enterprise telephony providers worldwide

Name: Enterprise telephony providers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 8,278 companies tracked

RevenueBase identified 8,278 company matches for enterprise telephony providers worldwide as of November 2026 and tracks 131,372 professional contacts across them, including 32,443 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for enterprise telephony providers worldwide, 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 November 5, 2026. Country and city lists for enterprise telephony providers follow the table.

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 Nov 5, 2026 How this list was built

8,278Companies

131,372Contacts tracked

32,443Verified emails

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The 25 largest enterprise telephony providers worldwide

Ranked by team size

Top 25 of 8,278 company matches for enterprise telephony providers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Ringcentral	Exact match	Belmont, United StatesHQ recorded Nov 5, 2026	5,001-10,000	6,795 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 · Nov 5, 2026 · View company records in RevenueBase
2	Cable ONE	Exact match	Phoenix, AZ, United StatesHQ recorded Nov 5, 2026	1,001-5,000	5,608 contacts →
	Exact match “Cable One Business offers scalable, reliable, and efficient solutions so that the businesses we serve can be successful.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	Airtel Business	Exact match	Gurgaon, IndiaHQ recorded Nov 5, 2026	10001+	2,862 contacts →
	Exact match “The B2B arm of Bharti Airtel, we are India's leading provider of secure and reliable connectivity, technology, and communications solutions.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	GOTO	Exact match	Boston, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,412 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 · Nov 5, 2026 · View company records in RevenueBase
5	Granite Telecommunications	Exact match	Quincy, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,395 contacts →
	Exact match “Granite is a dynamic and rapidly growing company serving the exciting and demanding Telecommunications market.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Unifique	Exact match	Timbó, BrazilHQ recorded Nov 5, 2026	1,001-5,000	1,962 contacts →
	Exact match “Somos uma empresa de telecomunicações com 28 anos de atuação.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Polycom	Exact match	San Jose, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,954 contacts →
	Exact match “Plantronics and Polycom are now Poly.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	GAMMA	Exact match	London, United KingdomHQ recorded Nov 5, 2026	1,001-5,000	1,631 contacts →
	Exact match “Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Tulip Telecom	Exact match	New Delhi, IndiaHQ recorded Nov 5, 2026	1,001-5,000	1,601 contacts →
	Exact match “Tulip Telecom Ltd.(BSE: 532691/NSE: TULIP) is India’s leading Enterprise Communications Service provider.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Intermedia Intelligent Communications	Exact match	Sunnyvale, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,411 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 · Nov 5, 2026 · View company records in RevenueBase
11	Integra	Exact match	Vancouver, WA, United StatesHQ recorded Nov 5, 2026	501-1,000	1,123 contacts →
	Exact match “Integra is Allstream.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Link3 Technologies Limited	Exact match	Gulshan, IranHQ recorded Nov 5, 2026	501-1,000	811 contacts →
	Exact match “Link3 Technologies Limited is Nationwide Internet, Intranet and IP telephony Solution & Service provider.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Nashua LTD	Exact match	Woodmead, South AfricaHQ recorded Nov 5, 2026	201-500	782 contacts →
	Exact match “Welcome to the future of working.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Shoretel	Exact match	Kanata, CanadaHQ recorded Nov 5, 2026	1,001-5,000	717 contacts →
	Exact match “ShoreTel is now part of Mitel.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Onecom	Exact match	Fareham, United KingdomHQ recorded Nov 5, 2026	501-1,000	715 contacts →
	Exact match “Onecom is the UK’s leading business telecoms and cloud communications provider managing over a million services for business customers - delivering communication services and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Ooma, INC	Exact match	Sunnyvale, CA, United StatesHQ recorded Nov 5, 2026	501-1,000	651 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 · Nov 5, 2026 · View company records in RevenueBase
17	Deepija Telecom PVT LTD	Exact match	Hyderabad, IndiaHQ recorded Nov 5, 2026	201-500	551 contacts →
	Exact match “Telecom Applications are one of the fastest-changing technologies of today.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	C3ntro Telecom	Exact match	Miguel Hidalgo, MexicoHQ recorded Nov 5, 2026	501-1,000	533 contacts →
	Exact match “Somos C3NTRO, una empresa mexicana de clase mundial con 15 años de experiencia en Telecomunicaciones.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	DBS Group	Exact match	Grimsby, United KingdomHQ recorded Nov 5, 2026	n/a	486 contacts →
	Exact match “Rural Wi-Fi • Wide Area Wi-Fi • Holiday Park Wi-Fi • Farm Wi-Fi • Point-to-Point Wireless • Business Broadband • Starlink Distribution • Business VoIP • Cloud Phone Systems •…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Sangoma	Exact match	Markham, ON, CanadaHQ recorded Nov 5, 2026	201-500	475 contacts →
	Exact match “Sangoma Technologies Corporation (TSX: STC; Nasdaq: SANG) is a global leader in essential business communications.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	NEW Horizon Communications	Exact match	Concord, FL, United StatesHQ recorded Nov 5, 2026	51-200	455 contacts →
	Exact match “NHC is THE communications STACK provider™.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Momentum	Exact match	Atlanta, GA, United StatesHQ recorded Nov 5, 2026	501-1,000	447 contacts →
	Exact match “We unleash human momentum with collaboration, connectivity, and communications technology.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Real Time Data Services	Exact match	Gurgaon, IndiaHQ recorded Nov 5, 2026	501-1,000	443 contacts →
	Exact match “Founded in 2010, Real Time Data Services (RTDS) is a group of companies excelling in global information technology, specializing in Cloud Computing and Cloud Telephony.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Fusion Connect	Exact match	Atlanta, GA, United StatesHQ recorded Nov 5, 2026	201-500	443 contacts →
	Exact match “Fusion Connect delivers innovative, cloud communications services that transform business infrastructure into a foundation for lasting success.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	phone.com	Exact match	New York, NY, United StatesHQ recorded Nov 5, 2026	201-500	433 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 · Nov 5, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “enterprise telephony providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 8,278 enterprise telephony providers worldwide

See the full list, filter by size, metro and specialty, and access 32,443 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Enterprise telephony providers worldwide at a glance

As of Nov 5, 2026

24.7%Verified-email coverage

15.9Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

3,902

11-50

3,245

51-200

773

201-500

172

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for enterprise telephony providers are linked below.
What qualifies: Company records worldwide whose business descriptions match “enterprise telephony providers” 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. 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 32,443 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 November 5, 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.

Enterprise telephony providers by location

43 lists · largest first

Every Enterprise telephony providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “enterprise telephony providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many enterprise telephony providers are there worldwide?

RevenueBase identified 8,278 company matches for enterprise telephony providers worldwide as of November 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?

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

Which country has the most enterprise telephony providers?

The United States leads with 2,168 companies, followed by the United Kingdom (1,012) and Brazil (469). Every enterprise telephony providers list by country and city is linked on this page.

Which city has the most enterprise telephony providers?

London leads with 169 company records, followed by Sao Paulo (124) and New York (68).

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 32,443 professional contacts with verified work emails tracked across these 8,278 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 November 5, 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.