Company lists · Data refreshed September 2026
Top 25 Enterprise phone system providers worldwide
RevenueBase identified 3,682 enterprise phone system providers worldwide as of September 2026 and tracks 32,204 professional contacts across them, including 8,056 with verified work emails. The United States is the largest market and London the largest hub.
This list covers enterprise phone system 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 phone system 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.
The 25 largest enterprise phone system providers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 666 contacts → | ||||
Indirect evidence “We @ VIS Networks (Voice Infrastructure Services) believe in the future of technology services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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, 2026Thanks. The Data Team will review it. | |||||
| 4 | 403 contacts → | ||||
Partial evidence “VoIP/ToIP services Operator and Integrator Telephony solutions for small and medium-sized enterprises.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 366 contacts → | ||||
Strong 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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | 272 contacts → | ||||
Indirect evidence “Progility Technologies Pvt.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 252 contacts → | ||||
Indirect evidence “As the leading global integrator of business communication solutions and services since 1993, NACR has been a trusted advisor to more than 40% of the Fortune 100 companies…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 170 contacts → | ||||
Indirect evidence “Fortis is a Sacramento Area provider of managed IT services, hosted VoIP, and high speed, redundant internet.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 159 contacts → | ||||
Strong evidence “Zultys is a premier provider of omnichannel, Unified Communications, hosted business phone services and premise-based communications systems.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 151 contacts → | ||||
Partial evidence “In-Telecom offers a full spectrum of solutions such as VoIP phones, access control, unparalleled customer service, IT consulting, and quality workmanship from our experienced…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 133 contacts → | ||||
Partial evidence “Unimax believes that administering PBX and voice messaging systems can be far less complex and costly, while delivering better service levels.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 131 contacts → | ||||
Indirect evidence “Unifiedvoice is a globally recognized VoIP service and solutions provider.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 127 contacts → | ||||
Indirect evidence “Transcom Telecommunications (formerly called "Transcom Services") is a Veteran Owned Business founded in 1986 on 3 core ideas.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 122 contacts → | ||||
Indirect evidence “WHY TELECO At TELECO, we believe that business owners deserve access to the same advantage-creating technologies mega corporations depend on for their success.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 121 contacts → | ||||
Strong evidence “Founded in 1987, Estech Systems (ESI), a Crexendo® company, delivers high-performance phone systems designed for growing businesses.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 112 contacts → | ||||
Partial evidence “KOL Telecom is the leading innovator of small business Voice over IP (VoIP) Phone services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 110 contacts → | ||||
Indirect evidence “We Solve Problems and Create Solutions with VoIP.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 105 contacts → | ||||
Indirect evidence “VozTelecom es la compañía especialista en comunicaciones cloud y líder en telefonía IP dentro del segmento de la pequeña y mediana empresa en España.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 96 contacts → | ||||
Indirect evidence “Voys levert zakelijke telefonie.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 96 contacts → | ||||
Indirect evidence “innovaphone has been playing a decisive role in driving the development of IP telephony and digital transformation for more than 25 years now and is a leading European provider of…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
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 phone system 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 phone system providers.
- Partial evidence
- Its own public description names part of enterprise phone system providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name enterprise phone system 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 3,682 enterprise phone system providers worldwide
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Enterprise phone system providers worldwide at a glance
As of Sep 28, 2026Companies by employee count
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 phone system 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 phone system providers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “enterprise phone system 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 phone system 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 phone system 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, 8,056 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 phone system providers by location
14 lists · largest firstEvery Enterprise phone system providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Enterprise phone system providers based in the United States1,263
- Enterprise phone system providers based in the United Kingdom347
- Enterprise phone system providers based in Canada175
- Enterprise phone system providers based in Brazil172
- Enterprise phone system providers based in France118
- Enterprise phone system providers based in Australia111
- Enterprise phone system providers based in Germany98
- Enterprise phone system providers based in Italy87
- Enterprise phone system providers based in Spain80
- Enterprise phone system providers based in India70
- Enterprise phone system providers based in the Netherlands62
- Enterprise phone system providers based in South Africa53
- Enterprise phone system providers based in Belgium34
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 phone system 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 phone system providers are there worldwide?
RevenueBase identified 3,682 enterprise phone system 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?
VIS Networks, headquartered in Bangalore, tops this list with the largest team on record.
Which country has the most enterprise phone system providers?
The United States leads with 1,263 companies, followed by the United Kingdom (347) and Canada (175). Every enterprise phone system providers list by country and city is linked on this page.
Which city has the most enterprise phone system providers?
London leads with 51 headquartered companies, followed by Sao Paulo (42) and New York (31).
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 8,056 verified decision-maker contacts tracked across these 3,682 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.