Company lists · Data refreshed September 2026

Top 25 Calling companies based in Brazil

Name: Calling companies based in Brazil
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 525 companies tracked

RevenueBase identified 525 calling companies headquartered in Brazil as of September 2026 and tracks 12,990 professional contacts across them, including 905 with verified work emails. Sao Paulo is the largest hub.

This list covers calling companies headquartered in Brazil, 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 21, 2026.

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 21, 2026 86% judged on-target in blind review

525Companies

12,990Contacts tracked

905Verified emails

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The 25 largest calling companies based in Brazil

Ranked by team size

Top 25 of 525 calling companies based in Brazil, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to calling 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	Unifique	Indirect evidence	Timbó, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,807 contacts →
	Indirect evidence “Somos uma empresa de telecomunicações com 28 anos de atuação.” Source: RevenueBase Database · checked Sep 21, 2026
2	Ability Tecnologia E Serviços S A	Indirect evidence	Osasco, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,733 contacts →
	Indirect evidence “Com mais de funcionários, a Ability Tecnologia e Serviços S.A.” Source: RevenueBase Database · checked Sep 21, 2026
3	Sercomtel	Indirect evidence	Londrina, BrazilHQ checked Sep 21, 2026	501-1,000	1,001 contacts →
	Indirect evidence “A Sercomtel é a empresa paranaense de telecomunicações que oferece soluções completas em telefonia.” Source: RevenueBase Database · checked Sep 21, 2026
4	Mundivox Communications	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 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 21, 2026
5	DDS Telecomunicações Ltda	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	51-200	518 contacts →
	Indirect evidence “A DDS é uma empresa de tecnologia especializada na integração de sistemas.” Source: RevenueBase Database · checked Sep 21, 2026
6	Telecall	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 21, 2026	51-200	377 contacts →
	Indirect evidence “Smart internet and telephony solutions for you business.” Source: RevenueBase Database · checked Sep 21, 2026
7	IK	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	201-500	279 contacts →
	Indirect evidence “A IK Solution dispõe de diversas soluções inovadoras para seu negócio sair na frente.” Source: RevenueBase Database · checked Sep 21, 2026
8	Handphone Telecomunicações	Indirect evidence	Osasco, BrazilHQ checked Sep 21, 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 21, 2026
9	Telium Networks	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	201-500	235 contacts →
	Indirect evidence “A Telium, criada em 2004 para atender exclusivamente o mercado B2B, atende os segmentos de Telecom e IDC com infraestrutura de padrão internacional, totalmente adequada e…” Source: RevenueBase Database · checked Sep 21, 2026
10	Vivo Empresas GO	Indirect evidence	Goias, BrazilHQ checked Sep 21, 2026	n/a	178 contacts →
	Indirect evidence “Somos especialistas em telecomunicações para empresas, contamos com atendimento diferenciado e exclusivo, respeitando e satisfazendo o perfil do cliente.” Source: RevenueBase Database · checked Sep 21, 2026
11	Afline Manutenção E Instalação Ltda	Indirect evidence	Manaus, BrazilHQ checked Sep 21, 2026	201-500	154 contacts →
	Indirect evidence “Há 14 anos no mercado em prestações de serviços em Banda Larga, TV por assinatura, cabeamento estruturado, Call Center, proporcionando em atender melhor os cliente garantindo…” Source: RevenueBase Database · checked Sep 21, 2026
12	a.telecom	Indirect evidence	Brasília, BrazilHQ checked Sep 21, 2026	51-200	140 contacts →
	Indirect evidence “A A.Telecom é resultado das atualizações e mudanças no segmento de TI e telecomunicação.” Source: RevenueBase Database · checked Sep 21, 2026
13	Agil Telecom	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	11-50	61 contacts →
	Indirect evidence “Na Agil Telecom, trabalhamos para simplificar a comunicação das empresas.” Source: RevenueBase Database · checked Sep 21, 2026
14	Nipbr Telecom	Indirect evidence	São José Dos Campos, BrazilHQ checked Sep 21, 2026	201-500	57 contacts →
	Indirect evidence “A NipBr possui o objetivo de oferecer ao mercado corporativo meios de comunicação mais ágeis, seguros e eficientes, com soluções integradas, a fim de aproximar as distâncias entre…” Source: RevenueBase Database · checked Sep 21, 2026
15	Contel Telecom	Indirect evidence	Santa Cruz Do Sul, BrazilHQ checked Sep 21, 2026	11-50	52 contacts →
	Indirect evidence “Enfim uma operadora que descomplica sua vida” Source: RevenueBase Database · checked Sep 21, 2026
16	Telegestão	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 21, 2026	51-200	51 contacts →
	Indirect evidence “Empresa comprometida em prover soluções e serviços de alta qualidade em telecomunicações, que atendam as expectativas de seus clientes e colaboradores.” Source: RevenueBase Database · checked Sep 21, 2026
17	Hoje Telecom	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	11-50	46 contacts →
	Indirect evidence “A HOJE Telecom é uma Operadora Fixa que provê serviço de telefonia exclusivamente para empresas, com alta qualidade de atendimento e serviço, a preços muito abaixo do mercado…” Source: RevenueBase Database · checked Sep 21, 2026
18	Cepain	Indirect evidence	Assis Chateaubriand, BrazilHQ checked Sep 21, 2026	51-200	46 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
19	Grupo Union Telecom	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 21, 2026	51-200	44 contacts →
	Indirect evidence “O Grupo Union Telecom é referência em telecomunicações, oferecendo aos clientes e parceiros 20 anos de experiência, com profissionais capacitados, certificados e experientes.” Source: RevenueBase Database · checked Sep 21, 2026
20	Redt Telecom	Indirect evidence	Petrópolis, BrazilHQ checked Sep 21, 2026	51-200	40 contacts →
	Indirect evidence “RedT is a Rio de Janeiro based company commited to develop and deploy communication solutions mainly using VoIP solutions.” Source: RevenueBase Database · checked Sep 21, 2026
21	Facilita Telecom	Indirect evidence	Ubá, BrazilHQ checked Sep 21, 2026	11-50	38 contacts →
	Indirect evidence “A Facilita Telecom é uma empresa especialista em facilitar a comunicação das empresas com soluções inovadoras de telecom que minimizam custos e proporcionam comodidade, otimizando…” Source: RevenueBase Database · checked Sep 21, 2026
22	Alhambrait BR	Indirect evidence	Curitiba, BrazilHQ checked Sep 21, 2026	201-500	37 contacts →
	Indirect evidence “With offices in North and South America, and across Europe, Alhambra offers a global presence with localized solutions, support, and expertise.” Source: RevenueBase Database · checked Sep 21, 2026
23	Voitel Soluções DE Comunicação	Indirect evidence	São Paulo, BrazilHQ checked Sep 21, 2026	11-50	36 contacts →
	Indirect evidence “A Voitel atua há mais de 20 anos no mercado e é pioneira em Telefonia IP.” Source: RevenueBase Database · checked Sep 21, 2026
24	BR Conecta	Indirect evidence	Boituva, BrazilHQ checked Sep 21, 2026	51-200	36 contacts →
	Indirect evidence “BR Conecta started its activities in 2005 by bringing the VoIP telephony service to the interior of São Paulo, based in the city of Boituva.” Source: RevenueBase Database · checked Sep 21, 2026
25	Voicecorp Business Telecom	Indirect evidence	Recife, BrazilHQ checked Sep 21, 2026	11-50	36 contacts →
	Indirect evidence “Soluções econômicas e eficazes para você e para sua empresa.” Source: RevenueBase Database · checked Sep 21, 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: calling 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 calling companies.
Partial evidence: Its own public description names part of calling companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name calling 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 525 calling companies based in Brazil

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Calling companies based in Brazil at a glance

As of Sep 21, 2026

7.0%Verified-email coverage

24.7Average contacts per company

11-50Median size (employees)

22.5%Largest-city concentration · Sao Paulo

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

226

11-50

213

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Brazil, so it is reported there. Company counts and contact totals on this page are exact for Brazil, over 525 companies.

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 calling 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.
What qualifies: Companies headquartered in Brazil whose own description of what they do matches “calling 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 calling 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 calling companies, and records with no verified work email. Companies headquartered outside Brazil are excluded even when they keep an office there.
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, 905 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 21, 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.

Calling companies by metro

Calling companies in Sao Paulo118
Calling companies in Belo Horizonte25

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 calling 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 calling companies are there based in Brazil?

RevenueBase identified 525 calling companies headquartered in Brazil 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?

Unifique, headquartered in Timbo, tops this list with the largest team on record.

Which city has the most calling companies?

Sao Paulo leads with 118 headquartered companies, followed by Belo Horizonte (25) and Curitiba (22).

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 905 verified decision-maker contacts tracked across these 525 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 21, 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.