These companies are managed service providers based in Madrid, predominantly operating in IT services and consulting, with some significant telecommunications firms. The group includes large global players and established mid-sized firms. NTT DATA Europe & Latam offers global IT services, Telefónica Tech accelerates tech adoption, Entelgy provides business transformation solutions, and Zelenza delivers integrated ICT services.
The data shows a strong concentration of headquarters in Madrid, indicating the city's role as a central hub for technology and telecommunications services in Spain. The companies span a range of founding dates, from established firms like Cibernos (founded 1966) and Sermicro (founded 1985) to more recent entries such as Telxius (founded 2016).
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
NTT DATA Europe & Latamnttdata.com
Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future |
31,932 | |||
| 2 |
Telefónica Techtelefonicatech.com
Accelerating tech adoption through services in Cyber Security, Cloud, IoT, Big Data, AI, and Blockchain, with a strong presence on social media platforms |
4,392 | |||
| 3 |
Entelgyentelgy.com
A global consultancy that accelerates business transformation through innovative technological solutions, helping clients adapt and thrive in a constantly changing world |
1,796 | |||
| 4 |
UFINETufinet.com
A Latin American carrier of carriers providing high-quality telecom solutions with a carrier-grade network, customer-oriented services, and a wide service portfolio |
1,394 | |||
| 5 |
Zelenzazelenza.com
Company offers integrated ICT services, Telco network engineering, defense and security solutions, and customer experience. It helps businesses face digital challenges. |
1,332 | |||
| 6 |
Econocom Españaeconocom.es
Econocom provides digital transformation solutions for large companies and public organizations, with financing, equipment distribution, and digital services expertise Operating in 16 countries with over 8,750 employees |
1,305 | |||
| 7 |
Sermicrogruposermicro.com
ICT solutions and services integrator of reference with 35+ years of experience, offering innovative technology solutions for businesses worldwide Providing opportunities for professional growth |
1,239 | |||
| 8 |
Evolutio Empowering the cloudevolutio.com
Spanish technology expert specializing in cloud computing, cybersecurity, digital experience, and telecommunications for corporate and public entities With over 30 years of experience |
928 | |||
| 9 |
Fujitsu Spainfujitsu.com
With over 40 years in the Spanish market, the organization provides tailored technology solutions to various sectors, offering expertise in areas such as healthcare, banking, and justice |
623 | |||
| 10 |
Cibernosgrupocibernos.com
A Spanish IT consulting and services company with nearly 1,000 employees in Spain and Latin America, offering integrated solutions tailored to clients' needs |
580 | |||
| 11 | 420 | ||||
| 12 |
Axians Spainaxians.es
Specializing in IT and communications technologies, offering comprehensive solutions such as voice, data, and image communications, along with services like consultancy, integration, and support |
410 | |||
| 13 |
Telefónica Soluciones Outsourcing
A technology outsourcing company in Spain offering infrastructure management, ICT services, network management, and post-sales support, prioritizing flexibility, stability, and customer satisfaction |
356 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 14 |
COMPUSOF S.A.compusof.com
A leading company in IT and communications, with 40 years of experience, offering innovative solutions and cost savings to multinational clients Operating in Spain, Mexico, Portugal, and Latin America |
336 | |||
| 15 |
Telxiustelxius.com
The company provides ultra-high capacity, low latency global connectivity solutions through subsea and terrestrial networks, with colocation and security services |
316 | |||
| 16 |
Diggia Groupdiggia.com
Dedicated to promoting a transition to clean and renewable energies, offering innovative solutions for a sustainable economy and reducing greenhouse gas emissions |
294 | |||
| 17 |
fibratelfibratel.com
With over 30 years of experience, the company focuses on digitalization, IT security, networking solutions, and 360º managed services to protect businesses from cyber threats |
262 | |||
| 18 |
SoftwareOne Spainsoftwareone.com
Global technology provider offering Software & MultiCloud solutions to help businesses with digital transformation, infrastructure evolution, application modernization, and software asset management |
183 | |||
| 19 |
Sabio Españasabiogroup.com
Sabio ensures excellent customer experience by providing knowledge and solutions for companies to meet evolving customer needs through analysis and technology partnerships |
182 | |||
| 20 | 152 | ||||
| 21 |
JOTELULU Españajotelulu.com
Online cloud platform enabling traditional IT Companies to become Cloud Service Providers by offering IT products, communication solutions, and system administration tools for small businesses |
116 | |||
| 22 | 84 | ||||
| 23 |
Keycoes Comunicacioneskeycoes.es
An experienced technology provider offering IT infrastructure maintenance, logistics consulting, mobile and landline telephony, cloud storage, security, and customized solutions for businesses |
75 | |||
| 24 |
Datos101datos101.com
A data business continuity company offering services such as backups, disaster recovery plans, data storage, cybersecurity solutions, and compliance with data regulations |
21 | |||
| 25 |
Nwareplaynware.com
Revolutionizing the gaming industry with a cloud gaming platform that allows gamers to play any PC game on any device without installation democratizing access to video games worldwide |
8 | |||
| 26 |
Econocom Servicios Españaeconocom.es
A leading digital integrator in Europe offering services and financing for digital transformation, including IT solutions, cloud services, and managed security services |
1 | |||
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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 11, 2026.
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