Company lists · Data refreshed September 2026
Top 25 Voip consulting firms worldwide
RevenueBase identified 3,401 voip consulting firms worldwide as of September 2026 and tracks 24,143 professional contacts across them, including 5,724 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers voip consulting firms 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 29, 2026. Country and city lists for voip consulting firms 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 voip consulting firms 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 29, 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 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 403 contacts → | ||||
Partial evidence “VoIP/ToIP services Operator and Integrator Telephony solutions for small and medium-sized enterprises.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 198 contacts → | ||||
Indirect evidence “Advantage mitigates the complexity of navigating a constantly evolving IT landscape.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 184 contacts → | ||||
Indirect evidence “Established in 1988, Forerunner Technologies, Inc.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 170 contacts → | ||||
Partial evidence “bOnline is UK’s leading provider of VoIP services for micro and small businesses.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 154 contacts → | ||||
Partial evidence “IT Voice specializes in Managed IT and VoIP solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 131 contacts → | ||||
Partial evidence “Unifiedvoice is a globally recognized VoIP service and solutions provider.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 112 contacts → | ||||
Partial evidence “KOL Telecom is the leading innovator of small business Voice over IP (VoIP) Phone services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 110 contacts → | ||||
Partial evidence “We Solve Problems and Create Solutions with VoIP.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 94 contacts → | ||||
Indirect evidence “Inextrix Technologies Pvt.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 92 contacts → | ||||
Indirect evidence “Contegris provides Consultancy, System Integration and Innovative Communication Technology Solutions focusing on the enterprise market.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 89 contacts → | ||||
Indirect evidence “Ice Comms are an independent consultant which specialise in mobile, traditional landline, hosted, and broadband business telecommunication solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 75 contacts → | ||||
Indirect evidence “At ATSI, we believe technology should empower people.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 74 contacts → | ||||
Partial evidence “TeleComp is a full-service technology company offering Enterprise VoIP phone systems, Fiber Bandwidth, Cybersecurity/Compliance and Managed Services.” Source: RevenueBase Database · checked Sep 29, 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: voip consulting firms. 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 firms.
- Partial evidence
- Its own public description names part of voip consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name voip consulting firms. 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.
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Voip consulting firms worldwide at a glance
As of Sep 29, 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 voip consulting firms, 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 firms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “voip consulting firms”. 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 firms), 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 firms, 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, 5,724 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 29, 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 firms by location
17 lists · largest firstEvery Voip consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Voip consulting firms based in the United States1,165
- Voip consulting firms based in the United Kingdom191
- Voip consulting firms based in Brazil186
- Voip consulting firms based in Canada131
- Voip consulting firms based in Italy90
- Voip consulting firms based in Spain82
- Voip consulting firms based in France78
- Voip consulting firms based in India73
- Voip consulting firms based in the Netherlands72
- Voip consulting firms based in Germany67
- Voip consulting firms based in Australia64
- Voip consulting firms based in South Africa40
- Voip consulting firms based in Mexico36
- Voip consulting firms based in Switzerland33
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 voip consulting firms, 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 firms are there worldwide?
RevenueBase identified 3,401 voip consulting firms 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 firms?
The United States leads with 1,165 companies, followed by the United Kingdom (191) and Brazil (186). Every voip consulting firms list by country and city is linked on this page.
Which city has the most voip consulting firms?
Sao Paulo leads with 55 headquartered companies, followed by London (46) and New York (41).
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 5,724 verified decision-maker contacts tracked across these 3,401 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 29, 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.