Company lists · Data refreshed September 2026

Top 25 Voice and data sales consultants worldwide

Name: Voice and data sales consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 14,115 companies tracked

RevenueBase identified 14,115 voice and data sales consultants worldwide as of September 2026 and tracks 171,722 professional contacts across them, including 40,754 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers voice and data sales consultants 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 voice and data sales consultants 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 29, 2026 86% judged on-target in blind review

14,115Companies

171,722Contacts tracked

40,754Verified emails

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The 25 largest voice and data sales consultants worldwide

Ranked by team size

Top 25 of 14,115 voice and data sales consultants worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to voice and data sales consultants: 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	Amaris Consulting	Indirect evidence	Chêne-bourg, SwitzerlandHQ checked Sep 29, 2026	5,001-10,000	4,824 contacts →
	Indirect evidence “Amaris Consulting is an independent technology consulting firm providing guidance and solutions to businesses.” Source: RevenueBase Database · checked Sep 29, 2026
2	Spread Tecnologia	Indirect evidence	São Paulo, BrazilHQ checked Sep 29, 2026	1,001-5,000	2,521 contacts →
	Indirect evidence “With over 30 years of experience in Information and Communication Technology market, the Spread has extensive experience and expertise in the field and has the challenge of…” Source: RevenueBase Database · checked Sep 29, 2026
3	IES Communications	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,800 contacts →
	Indirect evidence “IES Communications a division of IES (NASDAQ: IESC) provides each client with a team of highly qualified dedicated professionals that deliver superior quality and cost effective…” Source: RevenueBase Database · checked Sep 29, 2026
4	Tulip Telecom	Indirect evidence	New Delhi, IndiaHQ checked Sep 29, 2026	1,001-5,000	1,481 contacts →
	Indirect evidence “Tulip Telecom Ltd.(BSE: 532691/NSE: TULIP) is India’s leading Enterprise Communications Service provider.” Source: RevenueBase Database · checked Sep 29, 2026
5	Sofrecom Tunisie	Indirect evidence	Tunis, TunisiaHQ checked Sep 29, 2026	1,001-5,000	1,397 contacts →
	Indirect evidence “Sofrecom, filiale du groupe France Télécom - Orange, a développé depuis plus de 45 ans un savoir-faire unique dans les métiers de l’opérateur, qui en fait aujourd’hui l’un des…” Source: RevenueBase Database · checked Sep 29, 2026
6	Integra	Indirect evidence	Vancouver, WA, United StatesHQ checked Sep 29, 2026	501-1,000	1,133 contacts →
	Indirect evidence “Integra is Allstream.” Source: RevenueBase Database · checked Sep 29, 2026
7	CCI Systems	Indirect evidence	Iron Mountain, MI, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,077 contacts →
	Indirect evidence “CCI Systems is an employee-owned solution provider specializing in telecommunications, comprehensive network assessments, industry-leading engineering, drafting and design…” Source: RevenueBase Database · checked Sep 29, 2026
8	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 29, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 29, 2026
9	KGPCO	Indirect evidence	Faribault, MN, United StatesHQ checked Sep 29, 2026	1,001-5,000	974 contacts →
	Indirect evidence “KGPCo is a key strategic partner to the world’s leading communication and technology companies creating the next generation of networks.” Source: RevenueBase Database · checked Sep 29, 2026
10	Líder Telecom Ltda	Indirect evidence	São Paulo, BrazilHQ checked Sep 29, 2026	1,001-5,000	959 contacts →
	Indirect evidence “A Líder Telecom oferece aos clientes serviços de assessoria necessária ao estabelecimento de seu planejamento técnico e operacional para atendimento a redes corporativas de…” Source: RevenueBase Database · checked Sep 29, 2026
11	Multinet Pakistan Private Limited	Indirect evidence	Karachi, PakistanHQ checked Sep 29, 2026	1,001-5,000	890 contacts →
	Indirect evidence “Multinet Pakistan is one of the premier information and communication solution providers for leading enterprises in the region.” Source: RevenueBase Database · checked Sep 29, 2026
12	NTG Clarity	Indirect evidence	Markham, ON, CanadaHQ checked Sep 29, 2026	501-1,000	876 contacts →
	Indirect evidence “NTG CLARITY is a leader in delivering network, telecom, IT and infrastructure solutions to network service providers and medium and large enterprises.” Source: RevenueBase Database · checked Sep 29, 2026
13	Mundivox Communications	Indirect evidence	São Paulo, BrazilHQ checked Sep 29, 2026	501-1,000	819 contacts →
	Indirect evidence “Com mais de 25 anos de experiência, a Mundivox é uma operadora licenciada pela Anatel, especializada em soluções integradas de comunicação para o mercado corporativo.” Source: RevenueBase Database · checked Sep 29, 2026
14	Allied Telesis	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	816 contacts →
	Indirect evidence “Our world is increasing in complexity.” Source: RevenueBase Database · checked Sep 29, 2026
15	Nunsys	Indirect evidence	Paterna, SpainHQ checked Sep 29, 2026	1,001-5,000	739 contacts →
	Indirect evidence “NUNSYS es una empresa especializada en la Implantación de Soluciones Integrales de Tecnología.” Source: RevenueBase Database · checked Sep 29, 2026
16	Exponential-E	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	667 contacts →
	Indirect evidence “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Source: RevenueBase Database · checked Sep 29, 2026
17	VIS Networks	Partial evidence	Bangalore, IndiaHQ checked Sep 29, 2026	201-500	666 contacts →
	Partial evidence “We @ VIS Networks (Voice Infrastructure Services) believe in the future of technology services.” Source: RevenueBase Database · checked Sep 29, 2026
18	Telcos Ingeniería	Indirect evidence	Bogotá D.c., ColombiaHQ checked Sep 29, 2026	1,001-5,000	650 contacts →
	Indirect evidence “Somos una organización especializada en la integración de soluciones efectivas que facilitan a las empresas del sector telecomunicaciones e infraestructura el logro de sus metas y…” Source: RevenueBase Database · checked Sep 29, 2026
19	DDS Telecomunicações Ltda	Indirect evidence	São Paulo, BrazilHQ checked Sep 29, 2026	51-200	518 contacts →
	Indirect evidence “A DDS é uma empresa de tecnologia especializada na integração de sistemas.” Source: RevenueBase Database · checked Sep 29, 2026
20	NAE	Indirect evidence	Barcelona, SpainHQ checked Sep 29, 2026	501-1,000	503 contacts →
	Indirect evidence “Nae is an international consulting firm specialized in the telecom sector, providing deal & strategy, business, and technology advisory services.” Source: RevenueBase Database · checked Sep 29, 2026
21	Javi Systems India Pvt. LTD	Indirect evidence	Gurgaon, IndiaHQ checked Sep 29, 2026	201-500	468 contacts →
	Indirect evidence “A privately held company Head Quartered in Bangalore and has a presence in New York.” Source: RevenueBase Database · checked Sep 29, 2026
22	SIRT	Indirect evidence	Barcelona, SpainHQ checked Sep 29, 2026	201-500	449 contacts →
	Indirect evidence “Experiencia, especialización y calidad de servicio son los tres valores clave en los que SIRT basa su actividad y la relación con sus clientes.” Source: RevenueBase Database · checked Sep 29, 2026
23	Mikrolink	Partial evidence	İstanbul, TürkiyeHQ checked Sep 29, 2026	1,001-5,000	426 contacts →
	Partial evidence “Mikrolink is a global systems integrator offering integrated solutions in telecommunications, data center technologies, and information & communication technologies (ICT).” Source: RevenueBase Database · checked Sep 29, 2026
24	Turnotech INC	Indirect evidence	Redmond, WA, United StatesHQ checked Sep 29, 2026	501-1,000	426 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
25	Axians Germany	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 29, 2026	1,001-5,000	403 contacts →
	Indirect evidence “AXIANS is the corporate brand for network infrastrucutures and corporate communications of VINCI Energies, one of the leading European providers of energy and information…” Source: RevenueBase Database · checked Sep 29, 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: voice and data sales consultants. 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 voice and data sales consultants.
Partial evidence: Its own public description names part of voice and data sales consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name voice and data sales consultants. 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 14,115 voice and data sales consultants worldwide

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Voice and data sales consultants worldwide at a glance

As of Sep 29, 2026

23.7%Verified-email coverage

12.2Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

7,347

11-50

5,045

51-200

1,292

201-500

248

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 voice and data sales consultants, 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 voice and data sales consultants are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “voice and data sales consultants”. 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 voice and data sales consultants), 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 voice and data sales consultants, 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, 40,754 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.

Voice and data sales consultants by location

82 lists · largest first

Every Voice and data sales consultants 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 voice and data sales consultants, 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 voice and data sales consultants are there worldwide?

RevenueBase identified 14,115 voice and data sales consultants 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?

Amaris Consulting, headquartered in Chene-Bourg, tops this list with the largest team on record.

Which country has the most voice and data sales consultants?

The United States leads with 3,185 companies, followed by Brazil (895) and the United Kingdom (706). Every voice and data sales consultants list by country and city is linked on this page.

Which city has the most voice and data sales consultants?

Sao Paulo leads with 246 headquartered companies, followed by London (118) and Madrid (85).

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 40,754 verified decision-maker contacts tracked across these 14,115 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.