# The 25 largest Telecommunications companies in Portugal

Tamtam tracks 25 Telecommunications companies headquartered in Portugal. This list ranks all of them by number of employees on LinkedIn, led by Vivo (Telefônica Brasil), Altice Portugal and MEO. Their median headcount is 169. Half of them were founded in 2008 or later. The most common headquarters are Lisbon (9).

This selection of telecommunications companies in Portugal includes large established players and younger firms. Altice Portugal and NOS SGPS, both based in Lisbon, are prominent operators offering a range of fixed, mobile, and multimedia services. MEO partners with businesses for innovation, while Altice Labs, located in Aveiro, develops innovative products for ICT markets. Newer entrants like DIGI Portugal, founded in 2021, and NOWO Portugal, founded in 2016, also feature, focusing on diverse communication services.

The data shows a strong concentration of telecommunications companies in Lisbon, with Altice Portugal, MEO, NOS SGPS, Portugal Telecom, DIGI Portugal, ONI, TELCABO S.A., and NOWO Portugal all headquartered in the capital. This indicates a central hub for the telecommunications industry within Portugal, encompassing both major operators and specialized service providers.

🇵🇹 Portugal · 25 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Vivo (Telefônica Brasil)](https://www.tamtam.ai/c/vivo-telefonica-brasil) (vivo.com.br)<br>Largest Brazilian telecommunications provider. Offers comprehensive fixed, mobile, and digital services including fiber optic, 4G, 4.5G, and IPTV. Focuses on digital inclusion and education. | Telecommunications | 🇵🇹 São Paulo | 39,219 | 1998 |
| 2 | [Altice Portugal](https://www.tamtam.ai/c/altice-portugal) (altice.pt)<br>A global telecommunications and multimedia operator in Portugal, offering fixed line, mobile, multimedia, data, and business solutions to meet digital consumer needs | Telecommunications | 🇵🇹 Lisbon | 5,800 |  |
| 3 | [MEO](https://www.tamtam.ai/c/meo) (meo.pt)<br>Partnering with businesses to innovate, overcome challenges, and enhance competitiveness, supporting economic growth across all sectors and locations. | Telecommunications | 🇵🇹 Lisbon | 5,389 |  |
| 4 | [NOS SGPS](https://www.tamtam.ai/c/nos-sgps) (nos.pt)<br>A forward-thinking organization providing cutting-edge fixed and mobile solutions for television, internet, voice, and data, leading in cinema distribution in Portugal | Telecommunications | 🇵🇹 Lisbon | 4,014 | 2014 |
| 5 | [Portugal Telecom](https://www.tamtam.ai/c/portugal-telecom) (telecom.pt)<br>A telecommunications and multimedia operator in Portugal, focused on innovation and customer experience, now part of a multinational company | Telecommunications | 🇵🇹 Lisbon | 2,823 |  |
| 6 | [Altice Labs](https://www.tamtam.ai/c/altice-labs) (alticelabs.com)<br>This company develops innovative products and services for ICT markets, collaborates with universities and research institutes, and focuses on technological innovation to improve people's lives | Telecommunications | 🇵🇹 Aveiro | 882 |  |
| 7 | [DIGI Portugal](https://www.tamtam.ai/c/digi-portugal) (digi.pt)<br>Leading telecommunications company in Europe offering mobile, internet, fixed-line, and fiber optic services across various growing markets with over 22 million customers | Telecommunications | 🇵🇹 Lisbon | 830 | 2021 |
| 8 | [Optimus](https://www.tamtam.ai/c/optimus) (nos.pt)<br>A telecommunications company launched in 1998 offering a range of mobile and fixed solutions using advanced technologies, merging to form a new, customer-oriented entity | Telecommunications | 🇵🇹 Matosinhos | 724 | 1998 |
| 9 | [ONI](https://www.tamtam.ai/c/oni-lisboa) (oni.pt)<br>Provider of convergent communications, cloud & IT solutions for businesses, offering management services and digital transformation Part of Gigas Group | Telecommunications | 🇵🇹 Lisbon | 536 | 1998 |
| 10 | [Visabeira Global SGPS, SA](https://www.tamtam.ai/c/visabeira-global-sgps-sa) (visabeiraglobal.com)<br>The company operates in telecommunications, energy, technology, and construction, offering a wide range of services from network engineering to building maintenance | Telecommunications | 🇵🇹 Viseu | 463 |  |
| 11 | [TELCABO S.A.](https://www.tamtam.ai/c/telcabo-s-a) (telcabo.pt)<br>A global provider of telecommunications and energy services with a focus on designing, implementing, and maintaining state-of-the-art networks for demanding customers worldwide | Telecommunications | 🇵🇹 Lisbon | 366 | 1986 |
| 12 | [Sonaecom](https://www.tamtam.ai/c/sonaecom) (sonae.com)<br>A diversified portfolio including telecommunications, media, and software & systems integration companies, specializing in mobile, fixed communications, media, and technology services | Telecommunications | 🇵🇹 Maia | 306 |  |
| 13 | [NOWO Portugal](https://www.tamtam.ai/c/nowo-portugal) (nowo.pt)<br>NOWO offers innovative communication services with freedom of choice, transparency, fair pricing, and customer respect, breaking away from traditional package offerings in the market | Telecommunications | 🇵🇹 Lisbon | 169 | 2016 |
| 14 | [Comunicações IN](https://www.tamtam.ai/c/comunicacoes-in) (inaciomeo.wixsite.com)<br>Founded in 2014, this company based in Lourinhã, Portugal works with major telecommunication operators to offer tailored solutions for residential and business customers | Telecommunications | 🇵🇹 Lourinhã | 169 | 2014 |
| 15 | [Telemax](https://www.tamtam.ai/c/telemax) (telemax.pt)<br>A Portuguese company specializing in Electronic Security, Radiocommunications, and Broadcasting, offering solutions for access control, vehicle control, and traffic barriers | Telecommunications | 🇵🇹 Porto | 168 | 1990 |
| 16 | [Thales em Portugal](https://www.tamtam.ai/c/thales-em-portugal) (thalesgroup.com)<br>A Portuguese Competence Centre of a global group, specialized in designing and deploying solutions for Defence, Security, and Transportation markets worldwide | Telecommunications | 🇵🇹 Oeiras | 164 |  |
| 17 | [MMCI](https://www.tamtam.ai/c/mmci) (mmci.pt)<br>A leading distributor of NOS, providing telecommunications and multimedia products and services, with a focus on technology, retail, and sales | Telecommunications | 🇵🇹 Trofa | 161 | 2008 |
| 18 | [Real Life Technologies](https://www.tamtam.ai/c/real-life-technologies) (reallife.pt)<br>A multinational ICT service provider offering a wide range of services and capabilities in information and communications technology, focusing on customer success and partnerships with leading tech companies | Telecommunications | 🇵🇹 Algés | 151 | 2008 |
| 19 | [GROUPFIX N](https://www.tamtam.ai/c/groupfix-n) (groupfix.pt)<br>Specializing in telecommunications services, the company offers a complete range of services from customer acquisition to infrastructure maintenance, with over 40 years of experience | Telecommunications | 🇵🇹 Braga | 109 |  |
| 20 | [Netceed Portugal](https://www.tamtam.ai/c/netceed-portugal) (etcp.pt)<br>A Portuguese company with 25 years of experience supplying passive materials for telecommunications networks, specializing in fiber optic infrastructure and connectivity | Telecommunications | 🇵🇹 Póvoa de Santa Iria | 104 | 2015 |
| 21 | [Meo Recrutamento](https://www.tamtam.ai/c/meo-recrutamento) (recrutamentocomercialmeo.pt)<br>Innovative telecommunications brand in Portugal offering mobile TV, high-speed internet, convergent services, and cutting-edge technology with a focus on customer satisfaction and quality | Telecommunications | 🇵🇹 Lisbon | 90 | 1991 |
| 22 | [EAE](https://www.tamtam.ai/c/eae) (eaenetworks.com)<br>Provider of integrated telecommunication services for Energy, Oil & Gas, Aviation, Power, Transportation, and related industries with custom solutions | Telecommunications | 🇵🇹 Ajah | 90 | 2018 |
| 23 | [CBE - Projects and Engineering in Telecommunications](https://www.tamtam.ai/c/cbe-projects-and-engineering-in-telecommunications) (cbe.pt)<br>A global service provider and integrator of fixed and mobile telecommunications technologies, offering innovative solutions with a focus on customer satisfaction | Telecommunications | 🇵🇹 Vialonga | 61 | 1998 |
| 24 | [Globaltronic - Electrónica e Telecomunicações S.A.](https://www.tamtam.ai/c/globaltronic-electronica-e-telecomunicacoes-s-a) (globaltronic.pt)<br>A company specializing in electronic equipment development, manufacturing and sales, providing innovative smart lighting control and Smart City solutions through Custom Engineering services | Telecommunications | 🇵🇹 Agueda | 17 | 2002 |
| 25 | [Império Global Telecomunicações LDA](https://www.tamtam.ai/c/imperio-global-telecomunicacoes-lda) (imperioglobal.com)<br>A leading telecommunications services company with unique management control tools, serving major European operators with customized solutions to add value to their businesses | Telecommunications | 🇵🇹 Aveiro | 15 | 2017 |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.

## More company lists in Portugal

- [The largest companies in Portugal](https://www.tamtam.ai/l/largest-companies-portugal) (1,725)
- [Multinational companies in Portugal](https://www.tamtam.ai/l/multinational-companies-portugal) (427)
- [Public sector organisations in Portugal](https://www.tamtam.ai/l/public-sector-organisations-portugal) (167)
- [Manufacturers in Portugal](https://www.tamtam.ai/l/manufacturers-portugal) (167)
- [Retail chains in Portugal](https://www.tamtam.ai/l/retail-chains-portugal) (158)
- [Critical infrastructure operators in Portugal](https://www.tamtam.ai/l/critical-infrastructure-operators-portugal) (156)
- [Companies with in-house R&D in Portugal](https://www.tamtam.ai/l/r-and-d-companies-portugal) (154)
- [Education providers in Portugal](https://www.tamtam.ai/l/education-companies-portugal) (135)
- [IT services companies in Portugal](https://www.tamtam.ai/l/it-services-companies-portugal) (128)
- [IT Services and IT Consulting companies in Portugal](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-portugal) (111)
- [Higher Education companies in Portugal](https://www.tamtam.ai/l/higher-education-companies-portugal) (109)
- [Corporate groups and holding companies in Portugal](https://www.tamtam.ai/l/holding-companies-portugal) (99)
- [Software Development companies in Portugal](https://www.tamtam.ai/l/software-development-companies-portugal) (96)
- [Financial services firms in Portugal](https://www.tamtam.ai/l/financial-services-firms-portugal) (95)
- [Companies with a mobile app in Portugal](https://www.tamtam.ai/l/companies-with-mobile-app-portugal) (94)
- [Professional services firms in Portugal](https://www.tamtam.ai/l/professional-services-firms-portugal) (91)
- [Healthcare providers in Portugal](https://www.tamtam.ai/l/healthcare-providers-portugal) (84)
- [Consulting firms in Portugal](https://www.tamtam.ai/l/consulting-firms-portugal) (79)
- [Research institutes in Portugal](https://www.tamtam.ai/l/research-institutes-portugal) (74)
- [Hospitals and Health Care companies in Portugal](https://www.tamtam.ai/l/hospitals-and-health-care-companies-portugal) (70)
- [SaaS companies in Portugal](https://www.tamtam.ai/l/saas-companies-portugal) (63)
- [Hotel and hospitality groups in Portugal](https://www.tamtam.ai/l/hospitality-groups-portugal) (61)
- [Hardware manufacturers in Portugal](https://www.tamtam.ai/l/hardware-companies-portugal) (60)
- [E-commerce companies in Portugal](https://www.tamtam.ai/l/ecommerce-companies-portugal) (56)

## The same list elsewhere

- [Telecommunications companies in the world](https://www.tamtam.ai/l/telecommunications-companies-in-the-world) (3,307)
- [Telecommunications companies in Europe](https://www.tamtam.ai/l/telecommunications-companies-in-europe) (1,294)

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Source: https://www.tamtam.ai/l/telecommunications-companies-portugal