Company lists · Data refreshed September 2026

Top 25 Enterprise telecom companies based in Portugal

Name: Enterprise telecom companies based in Portugal
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 96 companies tracked

RevenueBase identified 96 enterprise telecom companies headquartered in Portugal as of September 2026 and tracks 1,716 professional contacts across them, including 353 with verified work emails. Lisboa is the largest hub.

This list covers enterprise telecom companies headquartered in Portugal, 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

96Companies

1,716Contacts tracked

353Verified emails

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The 25 largest enterprise telecom companies based in Portugal

Ranked by team size

Top 25 of 96 enterprise telecom companies based in Portugal, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise telecom 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	ONI	Partial evidence	Lisbon, PortugalHQ checked Sep 21, 2026	201-500	323 contacts →
	Partial evidence “Oni was founded in 1998 with the liberalization of the Portuguese telecommunications market.” Source: RevenueBase Database · checked Sep 21, 2026
2	Telcabo S.A	Partial evidence	Lisbon, PortugalHQ checked Sep 21, 2026	1,001-5,000	313 contacts →
	Partial evidence “Telcabo, established in 1986, is a leading Telecommunications and Energy Services Provider with a global and complete End-to-End offer aimed to meet the most demanding customers.” Source: RevenueBase Database · checked Sep 21, 2026
3	Futurcabo	Indirect evidence	Carnaxide, PortugalHQ checked Sep 21, 2026	201-500	217 contacts →
	Indirect evidence “A Futurcabo é uma empresa fundada em 1997, e com experiência comprovada como “Service Provider Global” da NOS nos Sistemas de Televisão e Internet.” Source: RevenueBase Database · checked Sep 21, 2026
4	Sinalcabo	Partial evidence	Sintra, PortugalHQ checked Sep 21, 2026	501-1,000	134 contacts →
	Partial evidence “A SINALCABO iniciou a sua atividade em 1996 no sector das Telecomunicações, sendo a empresa mais antiga do Grupo, o qual integra também a Sinaltech (Soluções ICT Empresariais) e a…” Source: RevenueBase Database · checked Sep 21, 2026
5	Setronix	Partial evidence	Vialonga, PortugalHQ checked Sep 21, 2026	51-200	68 contacts →
	Partial evidence “Somos uma empresa 100% nacional, especialista na criação e implementação de soluções de telecomunicações.” Source: RevenueBase Database · checked Sep 21, 2026
6	Gizz, LDA	Partial evidence	Sequeira, PortugalHQ checked Sep 21, 2026	51-200	57 contacts →
	Partial evidence “A Gizz é uma referência nacional no sector das telecomunicações e da energia, operando nos segmentos de Retalho, Revenda e Instalação & Manutenção, enquanto parceira dos…” Source: RevenueBase Database · checked Sep 21, 2026
7	Onesource, Consultoria Informática LDA	Indirect evidence	Coimbra, PortugalHQ checked Sep 21, 2026	11-50	43 contacts →
	Indirect evidence “OneSource is an IT company specialized in the fields of data communications, security, networking and systems management, including the consultancy, auditing, design, development…” Source: RevenueBase Database · checked Sep 21, 2026
8	Acitel	Partial evidence	São Domingos De Rana, PortugalHQ checked Sep 21, 2026	11-50	41 contacts →
	Partial evidence “ACITEL 4 - SERVIÇOS DE TELECOMUNICAÇÕES, S.A, Empresa integrada no Grupo ACITEL, com 30 anos de experiência no Mercado de Telecomunicações, tem conquistado uma posição de…” Source: RevenueBase Database · checked Sep 21, 2026
9	IP Telecom	Partial evidence	Lisbon, PortugalHQ checked Sep 21, 2026	51-200	40 contacts →
	Partial evidence “IP Telecom, Serviços de Telecomunicações S.A, is a public telecommunications operator licensed by ANACOM, specialized in high-capacity Fiber Optic and Connectivity services, with…” Source: RevenueBase Database · checked Sep 21, 2026
10	Bergfone Telecomunicações	Indirect evidence	Cacém, PortugalHQ checked Sep 21, 2026	51-200	26 contacts →
	Indirect evidence “A Bergfone é o agente empresarial Vodafone nº 1 em vendas e um dos mais antigos.” Source: RevenueBase Database · checked Sep 21, 2026
11	Netlink S.A	Partial evidence	Sintra, PortugalHQ checked Sep 21, 2026	201-500	20 contacts →
	Partial evidence “A Netlink tem um conhecimento alargado no setor das telecomunicações, possibilitando a apresentação de soluções integradas nas fases de projeto, planeamento, instalação e…” Source: RevenueBase Database · checked Sep 21, 2026
12	TKT Serviços DE Telecomunicações, LDA	Partial evidence	Lisbon, PortugalHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “TKT Services is the latest TKT Group company, focused on providing services in the Telecommunications and Multimedia area.” Source: RevenueBase Database · checked Sep 21, 2026
13	Noshut, LDA	Indirect evidence	Vila Do Conde, PortugalHQ checked Sep 21, 2026	1-10	13 contacts →
	Indirect evidence “Founded in 2018, we are a service company in the area of Information and Communication Technologies.” Source: RevenueBase Database · checked Sep 21, 2026
14	SNU Telecomunicações E Energia	Partial evidence	Cacém, PortugalHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “A SNU é um projeto jovem, integrado num grupo empresarial que atua no mercado das telecomunicações, desde 2012.” Source: RevenueBase Database · checked Sep 21, 2026
15	Rederia Innovation	Partial evidence	Vagos, PortugalHQ checked Sep 21, 2026	11-50	12 contacts →
	Partial evidence “We established in 1995 focusing our activities in providing services, implementing projects, installation and maintenance of telecommunication, telemetry and control networks.” Source: RevenueBase Database · checked Sep 21, 2026
16	Conecticabo LDA	Partial evidence	Braga, PortugalHQ checked Sep 21, 2026	51-200	9 contacts →
	Partial evidence “A Conecticabo é uma empresa de Telecomunicações em progressivo crescimento, estando apta a prestar serviços em várias frentes, direta ou indiretamente para os grandes grupos de…” Source: RevenueBase Database · checked Sep 21, 2026
17	Maistel	Indirect evidence	Vizela, PortugalHQ checked Sep 21, 2026	11-50	8 contacts →
	Indirect evidence “Somos mais.” Source: RevenueBase Database · checked Sep 21, 2026
18	Megatic	Indirect evidence	Bragança, PortugalHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence “We are a young, dynamic company founded in 2015 with the aim of helping our customers to grow even more.” Source: RevenueBase Database · checked Sep 21, 2026
19	Omniprojectos	Partial evidence	Amadora, PortugalHQ checked Sep 21, 2026	11-50	5 contacts →
	Partial evidence “A Omniprojectos é uma empresa do Grupo Seromni SGPS, integradora de soluções globais e PME líder no sector da Engenharia de Redes de Telecomunicações.” Source: RevenueBase Database · checked Sep 21, 2026
20	Vpartner	Partial evidence	Braga, PortugalHQ checked Sep 21, 2026	11-50	5 contacts →
	Partial evidence “A VPartner é uma empresa especializada no negócio das telecomunicações.” Source: RevenueBase Database · checked Sep 21, 2026
21	Connecting Projectos E Consultoria	Indirect evidence	Lisbon, PortugalHQ checked Sep 21, 2026	11-50	4 contacts →
	Indirect evidence “Connecting Projectos e Consultoria Lda dedica-se ao fornecimento, implementação e suporte de Soluções de comunicações, Datacenters e integração de Soluções informáticas.” Source: RevenueBase Database · checked Sep 21, 2026
22	Avetelcom	Partial evidence	Vila Nova De Famalicão, PortugalHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial evidence “A AVETELCOM é uma empresa especializada em soluções de telecomunicações, tecnologia, sistemas de informação e informática, com uma presença de quase 30 anos nestes mercados.” Source: RevenueBase Database · checked Sep 21, 2026
23	TA Comunicações	Indirect evidence	Lisbon, PortugalHQ checked Sep 21, 2026	1-10	3 contacts →
	Indirect evidence “Fornecemos soluções globais e integradas de comunicações de voz e dados, capazes de sustentar, fortalecer e criar valor ao negócio dos nossos clientes empresarias…” Source: RevenueBase Database · checked Sep 21, 2026
24	Lusofónica	Partial evidence	Lisboa, PortugalHQ checked Sep 21, 2026	11-50	2 contacts →
	Partial evidence “A vasta experiência na área das telecomunicações, permite-nos ter um elevado Know-How no desempenho, conceção, desenvolvimento e implementação de Soluções Globais de Sistemas e…” Source: RevenueBase Database · checked Sep 21, 2026
25	Virtual Target Telecomunicações	Indirect evidence	Ermesinde, PortugalHQ checked Sep 21, 2026	1-10	2 contacts →
	Indirect evidence “Ajudamos as empresas a encontrar as soluções mais adequadas e avançadas.” 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: enterprise telecom 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 enterprise telecom companies.
Partial evidence: Its own public description names part of enterprise telecom companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise telecom 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 96 enterprise telecom companies based in Portugal

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Enterprise telecom companies based in Portugal at a glance

As of Sep 21, 2026

20.6%Verified-email coverage

17.9Average contacts per company

11-50Median size (employees)

13.5%Largest-city concentration · Lisboa

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Portugal, so it is reported there. Company counts and contact totals on this page are exact for Portugal, over 96 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 enterprise telecom 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 Portugal whose own description of what they do matches “enterprise telecom 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 enterprise telecom 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 enterprise telecom companies, and records with no verified work email. Companies headquartered outside Portugal 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, 353 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.

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 enterprise telecom 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 enterprise telecom companies are there based in Portugal?

RevenueBase identified 96 enterprise telecom companies headquartered in Portugal 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?

ONI, headquartered in Lisboa, tops this list with the largest team on record.

Which city has the most enterprise telecom companies?

Lisboa leads with 13 headquartered companies, followed by Maia (5) and Porto (4).

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 353 verified decision-maker contacts tracked across these 96 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.