Company lists · Data refreshed September 2026

Top 25 Voip consulting companies worldwide

Name: Voip consulting companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 3,261 companies tracked

RevenueBase identified 3,261 voip consulting companies worldwide as of September 2026 and tracks 23,493 professional contacts across them, including 5,374 with verified work emails. The United States is the largest market and London the largest hub.

This list covers voip consulting companies 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 22, 2026. Country and city lists for voip consulting companies 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 22, 2026 86% judged on-target in blind review

3,261Companies

23,493Contacts tracked

5,374Verified emails

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The 25 largest voip consulting companies worldwide

Ranked by team size

Top 25 of 3,261 voip consulting companies worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to voip consulting 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	VIS Networks	Indirect evidence	Bangalore, IndiaHQ checked Sep 22, 2026	201-500	666 contacts →
	Indirect evidence “We @ VIS Networks (Voice Infrastructure Services) believe in the future of technology services.” Source: RevenueBase Database · checked Sep 22, 2026
2	C3ntro Telecom	Indirect evidence	Miguel Hidalgo, MexicoHQ checked Sep 22, 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 22, 2026
3	Stelogy	Partial evidence	Paris, FranceHQ checked Sep 22, 2026	501-1,000	403 contacts →
	Partial evidence “VoIP/ToIP services Operator and Integrator Telephony solutions for small and medium-sized enterprises.” Source: RevenueBase Database · checked Sep 22, 2026
4	ACS	Indirect evidence	Lake Mary, FL, United StatesHQ checked Sep 22, 2026	n/a	358 contacts →
	Indirect 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 22, 2026
5	KEYYO	Indirect evidence	Clichy, FranceHQ checked Sep 22, 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 22, 2026
6	Advantage Communications Group	Indirect evidence	Port Washington, NY, United StatesHQ checked Sep 22, 2026	51-200	198 contacts →
	Indirect evidence “Advantage mitigates the complexity of navigating a constantly evolving IT landscape.” Source: RevenueBase Database · checked Sep 22, 2026
7	Forerunner Technologies, INC	Indirect evidence	Edgewood, NY, United StatesHQ checked Sep 22, 2026	51-200	184 contacts →
	Indirect evidence “Established in 1988, Forerunner Technologies, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
8	Pulse Telesystems	Indirect evidence	Chennai, IndiaHQ checked Sep 22, 2026	51-200	175 contacts →
	Indirect evidence “Pulse Telesystems is a leading telecom solution provider in India, offering businesses personalized telecom solutions that meet their growing needs and beyond.” Source: RevenueBase Database · checked Sep 22, 2026
9	Bonline	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	170 contacts →
	Partial evidence “bOnline is UK’s leading provider of VoIP services for micro and small businesses.” Source: RevenueBase Database · checked Sep 22, 2026
10	In-Telecom	Strong evidence	Slidell, LA, United StatesHQ checked Sep 22, 2026	51-200	151 contacts →
	Strong 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 22, 2026
11	IPCOM	Partial evidence	Miramar, FL, United StatesHQ checked Sep 22, 2026	51-200	142 contacts →
	Partial 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 22, 2026
12	Gurusons Communications PVT LTD	Indirect evidence	New Delhi, IndiaHQ checked Sep 22, 2026	51-200	135 contacts →
	Indirect evidence “Gurusons Communications Private Limitedis the most trusted Resource for Voice, Chat, Video and Data communication management solutions in the country.” Source: RevenueBase Database · checked Sep 22, 2026
13	Unified Voice Communication PVT LTD	Partial evidence	Chennai, IndiaHQ checked Sep 22, 2026	51-200	131 contacts →
	Partial evidence “Unifiedvoice is a globally recognized VoIP service and solutions provider.” Source: RevenueBase Database · checked Sep 22, 2026
14	KOL Telecom Services LLC	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 22, 2026	11-50	112 contacts →
	Partial evidence “KOL Telecom is the leading innovator of small business Voice over IP (VoIP) Phone services.” Source: RevenueBase Database · checked Sep 22, 2026
15	Voip Supply	Partial evidence	Amherst, NY, United StatesHQ checked Sep 22, 2026	11-50	110 contacts →
	Partial evidence “We Solve Problems and Create Solutions with VoIP.” Source: RevenueBase Database · checked Sep 22, 2026
16	Telecloud	Partial evidence	Morristown, NJ, United StatesHQ checked Sep 22, 2026	11-50	108 contacts →
	Partial 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 22, 2026
17	Gamma Comunicaciones	Indirect evidence	Cerdanyola Del Vallés, SpainHQ checked Sep 22, 2026	51-200	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 22, 2026
18	Commpeak	Indirect evidence	Wan Chai, Hong KongHQ checked Sep 22, 2026	51-200	96 contacts →
	Indirect evidence “CommPeak makes cloud-based business communication easier and more affordable, empowering people with superior quality products.” Source: RevenueBase Database · checked Sep 22, 2026
19	Inextrix Technologies Pvt. LTD	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 22, 2026	51-200	94 contacts →
	Indirect evidence “Inextrix Technologies Pvt.” Source: RevenueBase Database · checked Sep 22, 2026
20	Contegris Technology Solutions	Indirect evidence	Lahore, PakistanHQ checked Sep 22, 2026	51-200	92 contacts →
	Indirect evidence “Contegris provides Consultancy, System Integration and Innovative Communication Technology Solutions focusing on the enterprise market.” Source: RevenueBase Database · checked Sep 22, 2026
21	Gventure Technology PVT LTD	Partial evidence	Dover, DE, United StatesHQ checked Sep 22, 2026	51-200	85 contacts →
	Partial evidence “GVenture is a leading VoIP solution development, web application development and mobile application development company over globe and offshore development center at Delhi India.” Source: RevenueBase Database · checked Sep 22, 2026
22	Voip Networks	Partial evidence	Cherry Hill, NJ, United StatesHQ checked Sep 22, 2026	51-200	83 contacts →
	Partial evidence “Powering Your Companies Voice & More Utilizing the latest technologies in voice such as VoIP (Voice-Over-Internet-Protocol) and other networking technologies, we can provide your…” Source: RevenueBase Database · checked Sep 22, 2026
23	Speedflow	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	79 contacts →
	Indirect evidence “With a broad experience in the industry, Speedflow is in the best position to provide you with products and services proven by time to be effective.” Source: RevenueBase Database · checked Sep 22, 2026
24	Csdnet	Indirect evidence	Bayport, NY, United StatesHQ checked Sep 22, 2026	51-200	76 contacts →
	Indirect evidence “CSDNET, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
25	Atsi Business Communications Systems	Indirect evidence	Houston, TX, United StatesHQ checked Sep 22, 2026	11-50	75 contacts →
	Indirect evidence “At ATSI, we believe technology should empower people.” Source: RevenueBase Database · checked Sep 22, 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: voip consulting 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 voip consulting companies.
Partial evidence: Its own public description names part of voip consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name voip consulting 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 3,261 voip consulting companies worldwide

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Voip consulting companies worldwide at a glance

As of Sep 22, 2026

22.9%Verified-email coverage

7.2Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

1,829

11-50

1,175

51-200

202

201-500

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 voip consulting 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.
Coverage: Every country. Country and city lists for voip consulting companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “voip consulting 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 voip consulting 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 voip consulting companies, 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, 5,374 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 22, 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.

Voip consulting companies by location

14 lists · largest first

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

Countries

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 voip consulting 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 voip consulting companies are there worldwide?

RevenueBase identified 3,261 voip consulting companies 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 voip consulting companies?

The United States leads with 1,086 companies, followed by the United Kingdom (199) and Brazil (166). Every voip consulting companies list by country and city is linked on this page.

Which city has the most voip consulting companies?

London leads with 52 headquartered companies, followed by Sao Paulo (52) and New York (40).

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 5,374 verified decision-maker contacts tracked across these 3,261 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 22, 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.