Company lists · Data refreshed September 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 Sep 28, 2026 6,859 companies tracked

RevenueBase identified 6,859 enterprise telephony providers worldwide as of September 2026 and tracks 87,637 professional contacts across them, including 21,466 with verified work emails. The United States is the largest market and London the largest hub.

This list covers enterprise telephony providers worldwide, 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 28, 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 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 28, 2026 86% judged on-target in blind review

6,859Companies

87,637Contacts tracked

21,466Verified emails

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The 25 largest enterprise telephony providers worldwide

Ranked by team size

Top 25 of 6,859 enterprise telephony providers worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise 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	GOTO	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,320 contacts →
	Indirect 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 28, 2026
2	Granite Telecommunications	Indirect evidence	Quincy, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,270 contacts →
	Indirect evidence “Granite is a dynamic and rapidly growing company serving the exciting and demanding Telecommunications market.” Source: RevenueBase Database · checked Sep 28, 2026
3	GAMMA	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,568 contacts →
	Indirect evidence “Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Source: RevenueBase Database · checked Sep 28, 2026
4	Tulip Telecom	Partial evidence	New Delhi, IndiaHQ checked Sep 28, 2026	1,001-5,000	1,481 contacts →
	Partial evidence “Tulip Telecom Ltd.(BSE: 532691/NSE: TULIP) is India’s leading Enterprise Communications Service provider.” Source: RevenueBase Database · checked Sep 28, 2026
5	Integra	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 28, 2026	501-1,000	1,133 contacts →
	Indirect evidence “Integra is Allstream.” Source: RevenueBase Database · checked Sep 28, 2026
6	Link3 Technologies Limited	Partial evidence	Gulshan, IranHQ checked Sep 28, 2026	501-1,000	837 contacts →
	Partial evidence “Link3 Technologies Limited is Nationwide Internet, Intranet and IP telephony Solution & Service provider.” Source: RevenueBase Database · checked Sep 28, 2026
7	Onecom	Indirect evidence	Fareham, United KingdomHQ checked Sep 28, 2026	501-1,000	655 contacts →
	Indirect evidence “Onecom is the UK’s leading business telecoms and cloud communications provider managing over a million services for business customers - delivering communication services and…” Source: RevenueBase Database · checked Sep 28, 2026
8	Ooma, INC	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 28, 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 28, 2026
9	Deepija Telecom PVT LTD	Indirect evidence	Hyderabad, IndiaHQ checked Sep 28, 2026	201-500	527 contacts →
	Indirect evidence “Telecom Applications are one of the fastest-changing technologies of today.” Source: RevenueBase Database · checked Sep 28, 2026
10	C3ntro Telecom	Indirect evidence	Miguel Hidalgo, MexicoHQ checked Sep 28, 2026	501-1,000	507 contacts →
	Indirect evidence “Somos C3NTRO, una empresa mexicana de clase mundial con 15 años de experiencia en Telecomunicaciones.” Source: RevenueBase Database · checked Sep 28, 2026
11	Sangoma	Indirect evidence	Markham, ON, CanadaHQ checked Sep 28, 2026	201-500	454 contacts →
	Indirect evidence “Sangoma Technologies Corporation (TSX: STC; Nasdaq: SANG) is a global leader in essential business communications.” Source: RevenueBase Database · checked Sep 28, 2026
12	Stelogy	Strong evidence	Paris, FranceHQ checked Sep 28, 2026	501-1,000	403 contacts →
	Strong evidence “VoIP/ToIP services Operator and Integrator Telephony solutions for small and medium-sized enterprises.” Source: RevenueBase Database · checked Sep 28, 2026
13	phone.com	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	398 contacts →
	Indirect 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 28, 2026
14	Logix Fiber Networks	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	371 contacts →
	Indirect evidence “LOGIX FIBER NETWORKS is a well-established Texas-based provider of telecommunications services since 1983.” Source: RevenueBase Database · checked Sep 28, 2026
15	Continuant	Partial evidence	Tacoma, WA, United StatesHQ checked Sep 28, 2026	201-500	366 contacts →
	Partial evidence “With three decades of expertise in the enterprise communications space, Continuant stands out as a seasoned Managed Services Provider, Systems Integrator, and Technology…” Source: RevenueBase Database · checked Sep 28, 2026
16	Telavox	Partial evidence	Malmö, SwedenHQ checked Sep 28, 2026	201-500	364 contacts →
	Partial evidence “We are a mobile operator only for businesses, specializing in simplifying and innovating telephony.” Source: RevenueBase Database · checked Sep 28, 2026
17	Soitron	Indirect evidence	Bratislava, SlovakiaHQ checked Sep 28, 2026	501-1,000	363 contacts →
	Indirect evidence “One of the leading systems integrators in the European market today.” Source: RevenueBase Database · checked Sep 28, 2026
18	ACS	Partial evidence	Lake Mary, FL, United StatesHQ checked Sep 28, 2026	n/a	358 contacts →
	Partial evidence “ACS has over three decades of experience and unparalleled expertise in the assessment and implementation of voice and data platforms and can provide solutions for telephone…” Source: RevenueBase Database · checked Sep 28, 2026
19	Wildix	Indirect evidence	Tallinn, EstoniaHQ checked Sep 28, 2026	201-500	334 contacts →
	Indirect evidence “The First Sales-Oriented Unified Communications Solution, now powered by AI Wildix develops secure, AI-powered business communication solutions designed to support revenue growth…” Source: RevenueBase Database · checked Sep 28, 2026
20	KEYYO	Indirect evidence	Clichy, FranceHQ checked Sep 28, 2026	201-500	319 contacts →
	Indirect evidence “Keyyo développe de nouveaux usages de communication pour les entreprises, notamment avec la voix sur IP.” Source: RevenueBase Database · checked Sep 28, 2026
21	BCM ONE	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 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 28, 2026
22	Syntel By Arvind	Indirect evidence	Pune, IndiaHQ checked Sep 28, 2026	201-500	298 contacts →
	Indirect evidence “Syntel is the Telecom Division of Arvind Limited, a flagship company of the INR 50 billion Lalbhai Group.” Source: RevenueBase Database · checked Sep 28, 2026
23	Handphone Telecomunicações	Indirect evidence	Osasco, BrazilHQ checked Sep 28, 2026	201-500	273 contacts →
	Indirect evidence “A Handphone Telecomunicações é uma indústria, fabricante de equipamentos para Telecomunicações, tais como sistemas PABX de pequeno, médio e grande porte, sistemas Call Center's…” Source: RevenueBase Database · checked Sep 28, 2026
24	Progility Technologies Pvt. LTD	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	201-500	272 contacts →
	Indirect evidence “Progility Technologies Pvt.” Source: RevenueBase Database · checked Sep 28, 2026
25	Respina Networks & Beyond	Indirect evidence	Tehran, IranHQ checked Sep 28, 2026	201-500	270 contacts →
	Indirect evidence “Founded in 2001 by a team of Tehran University graduates, Respina Networks & Beyond is one of the largest Telecom B2B Service Providers in Iran.” Source: RevenueBase Database · checked Sep 28, 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: enterprise 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 enterprise telephony providers.
Partial evidence: Its own public description names part of enterprise telephony providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise 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 6,859 enterprise telephony providers worldwide

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Enterprise telephony providers worldwide at a glance

As of Sep 28, 2026

24.5%Verified-email coverage

12.8Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

3,209

11-50

2,757

51-200

659

201-500

137

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among enterprise 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.
Coverage: Every country. Country and city lists for enterprise telephony providers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “enterprise 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 enterprise 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 enterprise telephony providers, and records with no verified work email.
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, 21,466 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 28, 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.

Enterprise telephony providers by location

35 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 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 enterprise 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 enterprise telephony providers are there worldwide?

RevenueBase identified 6,859 enterprise telephony providers worldwide 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?

GOTO, headquartered in Boston, tops this list with the largest team on record.

Which country has the most enterprise telephony providers?

The United States leads with 1,721 companies, followed by the United Kingdom (764) and Brazil (416). 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 136 headquartered companies, followed by Sao Paulo (113) and New York (58).

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 21,466 verified decision-maker contacts tracked across these 6,859 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 28, 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.