Company lists · Data refreshed September 2026

Top 25 Telecommunication engineering firms based in Brazil

Name: Telecommunication engineering firms based in Brazil
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 1,338 companies tracked

RevenueBase identified 1,338 telecommunication engineering firms headquartered in Brazil as of September 2026 and tracks 42,673 professional contacts across them, including 3,004 with verified work emails. Sao Paulo is the largest hub.

This list covers telecommunication engineering firms 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 30, 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 30, 2026 86% judged on-target in blind review

1,338Companies

42,673Contacts tracked

3,004Verified emails

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The 25 largest telecommunication engineering firms based in Brazil

Ranked by team size

Top 25 of 1,338 telecommunication engineering firms based in Brazil, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunication engineering firms: 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	Serede	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 30, 2026	10001+	8,011 contacts →
	Indirect evidence “A Serede é uma empresa prestadora de serviços de implantação e manutenção em redes de Telecom, fundada em 06 de agosto de 2007.” Source: RevenueBase Database · checked Sep 30, 2026
2	Procisa DO Brasil	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 2026	1,001-5,000	2,538 contacts →
	Indirect evidence “Prazer, somos a Procisa do Brasil!” Source: RevenueBase Database · checked Sep 30, 2026
3	Grupo RCS	Indirect evidence	Brasilia, BrazilHQ checked Sep 30, 2026	5,001-10,000	1,810 contacts →
	Indirect evidence “A RCS é uma empresa de Engenharia especializada em oferecer serviços técnicos de missão crítica com alta tecnologia aplicada, para clientes que necessitam manter suas atividades…” Source: RevenueBase Database · checked Sep 30, 2026
4	Líder Telecom Ltda	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 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 30, 2026
5	Mundivox Communications	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 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 30, 2026
6	B. Tobace Instalações Elétricas E Telefônicas Ltda	Indirect evidence	Jaboticabal, BrazilHQ checked Sep 30, 2026	1,001-5,000	478 contacts →
	Indirect evidence “B.” Source: RevenueBase Database · checked Sep 30, 2026
7	STN Empreendimentos E Construções	Indirect evidence	Areal, BrazilHQ checked Sep 30, 2026	501-1,000	471 contacts →
	Indirect evidence “A STN EMPREENDIMENTOS E CONSTRUÇÕES atua há mais de 30 anos nas áreas de engenharia elétrica, de eletromecânica e de engenharia civil em todo território nacional.” Source: RevenueBase Database · checked Sep 30, 2026
8	Maminfo	Indirect evidence	Campinas, BrazilHQ checked Sep 30, 2026	201-500	389 contacts →
	Indirect evidence “A MAMinfo é uma empresa de Consultoria e integradora de soluções em TI e telecomunicação, comercialização, instalação e suporte técnico para tecnologias de rede.” Source: RevenueBase Database · checked Sep 30, 2026
9	MY Business Ltda	Indirect evidence	Barueri, BrazilHQ checked Sep 30, 2026	201-500	362 contacts →
	Indirect evidence “A MY Business é uma empresa prestadora de serviços para telecomunicações, que atua no segmento de engenharia celular e TI, especializada na avaliação de qualidade dos serviços…” Source: RevenueBase Database · checked Sep 30, 2026
10	Alcon Engenharia DE Sistemas	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 2026	201-500	298 contacts →
	Indirect evidence “O nosso legado de excelência técnica e rigor em engenharia evoluiu.” Source: RevenueBase Database · checked Sep 30, 2026
11	IK	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 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 30, 2026
12	Ultra Engenharia E Construções Ltda	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 30, 2026	501-1,000	262 contacts →
	Indirect evidence “A ULTRA ENERGIA LTDA é uma empresa de obras e serviços com atuação nos segmentos de Engenharia Elétrica, Eletrônica, Telecomunicações e Civil.” Source: RevenueBase Database · checked Sep 30, 2026
13	Betta Global Partner	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 2026	51-200	247 contacts →
	Indirect evidence “O desenvolvimento da Betta Group está alicerçado na capacidade de se adaptar a diversos cenários empresariais, projetando infra-estruturas convergentes e elásticas, promovendo…” Source: RevenueBase Database · checked Sep 30, 2026
14	Infolink Telecom	Indirect evidence	Eusébio, BrazilHQ checked Sep 30, 2026	51-200	218 contacts →
	Indirect evidence “A INFOLINK TELECOM é uma empresa especializada em produtos e serviços de comunicação e tecnologia, presente no mercado desde 2004 com DNA de servir com qualidade e excelência…” Source: RevenueBase Database · checked Sep 30, 2026
15	ELO Telecomunicações E Construções Ltda	Indirect evidence	Aparecida De Goiania, BrazilHQ checked Sep 30, 2026	201-500	217 contacts →
	Indirect evidence “A ELO Telecomunicações e Construções Ltda é uma empresa especializada na prestação de serviços de transmissão nos seus mais variados campos.” Source: RevenueBase Database · checked Sep 30, 2026
16	Zênega Tecnologia	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 30, 2026	501-1,000	160 contacts →
	Indirect evidence “Projetos e soluções de infra-estrutura de rede de computadores e Telecom- Alocação de profissionais especializados nas referidas áreas- Projeto, desenvolvimento, implantação…” Source: RevenueBase Database · checked Sep 30, 2026
17	Afline Manutenção E Instalação Ltda	Indirect evidence	Manaus, BrazilHQ checked Sep 30, 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 30, 2026
18	Hexait Service Solutions	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 30, 2026	201-500	149 contacts →
	Indirect evidence “A HexaIT Service Solutions é uma empresa especializada em serviços de Tecnologia da Informação, com foco principal em tecnologias de redes e telecomunicações, como Routing &…” Source: RevenueBase Database · checked Sep 30, 2026
19	a.telecom	Indirect evidence	Brasília, BrazilHQ checked Sep 30, 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 30, 2026
20	Infratel	Indirect evidence	Pinhais, BrazilHQ checked Sep 30, 2026	51-200	118 contacts →
	Indirect evidence “A INFRATEL tem por foco a atuação em soluções turn-key em Engenharia e visa potencializar os negócios dos seus clientes garantindo que cada parceiro mantenha o devido foco em seu…” Source: RevenueBase Database · checked Sep 30, 2026
21	Zivasec	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 30, 2026	51-200	107 contacts →
	Indirect evidence “A ZivaSec,faz parte do Grupo NTSec e já conta com quinze anos de atuação no mercado, tem o objetivo de atuar com excelência em consultoria, implementação e gerenciamento de…” Source: RevenueBase Database · checked Sep 30, 2026
22	Iosi Energia	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 2026	51-200	100 contacts →
	Indirect evidence “Com 25 anos de atuação no mercado, a Iosi Energia oferece serviços completos em engenharia elétrica, automação e telecomunicações, atendendo as principais demandas de usinas…” Source: RevenueBase Database · checked Sep 30, 2026
23	Softcomp Conectividade	Indirect evidence	Lauro De Freitas, BrazilHQ checked Sep 30, 2026	201-500	100 contacts →
	Indirect evidence “Softcomp Telecomunicações: Pioneirismo e Inovação em Conectividade Sobre Nós: Com 27 anos de experiência, a Softcomp Telecomunicações é uma destacada empresa brasileira no setor…” Source: RevenueBase Database · checked Sep 30, 2026
24	Coelho Tecnologia	Indirect evidence	Canaã Dos Carajás, BrazilHQ checked Sep 30, 2026	n/a	99 contacts →
	Indirect evidence “Coelho Tecnologia, empresa especializada em Projetos de Telecomunicações, Infra-estrutura de Cabeamento, Fibra-Ótica, Radio Enlace, Redes, Switch, Roteadores, Asterisk, MikroTik…” Source: RevenueBase Database · checked Sep 30, 2026
25	Grupo Plantão	Indirect evidence	Lauro De Freitas, BrazilHQ checked Sep 30, 2026	51-200	99 contacts →
	Indirect evidence “Prazer, somos o Grupo Plantão!” Source: RevenueBase Database · checked Sep 30, 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: telecommunication engineering 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 telecommunication engineering firms.
Partial evidence: Its own public description names part of telecommunication engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunication engineering 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.

Showing 25 of 1,338 telecommunication engineering firms based in Brazil

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Telecommunication engineering firms based in Brazil at a glance

As of Sep 30, 2026

7.0%Verified-email coverage

31.9Average contacts per company

11-50Median size (employees)

24.4%Largest-city concentration · Sao Paulo

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

636

11-50

485

51-200

144

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 1,338 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 telecommunication engineering 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.
What qualifies: Companies headquartered in Brazil whose own description of what they do matches “telecommunication engineering 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 telecommunication engineering 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 telecommunication engineering firms, 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, 3,004 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 30, 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.

Telecommunication engineering firms by metro

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 telecommunication engineering 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 telecommunication engineering firms are there based in Brazil?

RevenueBase identified 1,338 telecommunication engineering firms 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?

Serede, headquartered in Rio De Janeiro, tops this list with the largest team on record.

Which city has the most telecommunication engineering firms?

Sao Paulo leads with 327 headquartered companies, followed by Rio De Janeiro (96) and Belo Horizonte (60).

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 3,004 verified decision-maker contacts tracked across these 1,338 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 30, 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.