The companies listed here are primarily large firms in Madrid specializing in IT services and consulting, with a strong focus on cybersecurity. Key players include Indra Group, a multinational in defense and space alongside IT services; NTT DATA Europe & Latam, a global IT services provider; Applus+, a leader in testing, inspection, and certification; and Accenture España, a professional services company driving digital transformation.
A clear pattern among these companies is their deep engagement in cybersecurity, cloud technology, and digital transformation, indicating a concentrated expertise in these areas within the Madrid business landscape. Many also offer comprehensive IT consulting and managed services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Indra Groupindragroup.com
Leading multinational providing defense, space, air traffic management, and mobility solutions alongside information technology services, artificial intelligence, cybersecurity, and advanced digital transformation projects. |
39,308 | |||
| 2 |
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 | |||
| 3 |
Applus+applus.com
A global leader in testing, inspection, and certification services, providing innovative solutions for asset integrity, regulatory compliance, and environmental performance |
20,046 | |||
| 4 |
Accenture Españaaccenture.com
A global professional services company helping businesses and governments with digital transformation, cloud technology, data analytics, and industry expertise to drive tangible outcomes |
6,208 | |||
| 5 |
KPMG Españakpmg.com
Professional services firm providing audit, tax, legal, financial, and business advisory with global expertise and local market knowledge. |
5,523 | |||
| 6 |
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 | |||
| 7 |
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 | |||
| 8 |
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 | |||
| 9 |
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 | |||
| 10 |
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 | |||
| 11 | 902 | ||||
| 12 |
MTP Métodos y Tecnologíamtp.es
Specialized consultancy providing Software Quality Assurance services to improve costs, deadlines, and quality of software products for Telecom, Banking, Insurance, Utilities, and Public Sector |
749 | |||
| 13 |
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 | |||
| 14 | 505 | ||||
| 15 | 459 | ||||
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. | |||||
| 16 |
Scalian Spainscalian-spain.es
Scalian Spain specializes in creating tailored solutions to drive business performance, develop innovative products, optimize strategic plans, and improve data insights |
350 | |||
| 17 |
Grupo ICAgrupoica.com
Providing digital transformation, cybersecurity, communication infrastructure, and IT professional services tailored to public and private sector needs. |
331 | |||
| 18 |
Grupo TECDATA Engineeringtecdata.es
Provides IT services and professional technology solutions with own infrastructure in Spain, focusing on client needs and business optimization. |
328 | |||
| 19 |
Thales Cybersecurity Services – Spain/Portugalthalesgroup.com
Offers cybersecurity products and services to keep people and assets safe, reinforcing trust and resilience in processes and infrastructures for global organizations. |
317 | |||
| 20 |
Thales en Españathalesgroup.com
Leading multinational in defense, aerospace, cybersecurity, and digital identity with multiple centers and 1,300 employees across Spain. |
292 | |||
| 21 |
Teldatteldat.com
A Spanish company providing innovative solutions for cloud access, remote office communications, cybersecurity, and connectivity in various environments Leaders in European corporate communications market |
290 | |||
| 22 |
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 | |||
| 23 |
Securitypymesecuritypyme.es
Specializing in thorough technical audits focused on cybersecurity to protect businesses in today's digital landscape, ensuring compliance and proposing tailored security solutions |
192 | |||
| 24 |
Procesiaprocesia.com
Procesia is an innovative group specializing in technology, training, and consulting for the modernization of Public Administration and Justice Administration through digital systems |
181 | |||
| 25 |
GlobalSuite Solutionsglobalsuitesolutions.com
Providing solutions for risk management, security, compliance, and auditing through specialized consulting, software, and managed services to diverse sectors. |
135 | |||
| 26 |
Lynx Techlynxtech.com
An AI-driven software company focusing on detecting and predicting behavioral patterns, offering cutting-edge AI technologies for financial institutions and commercial enterprises globally |
126 | |||
| 27 |
BOTECHbotech.info
A company specializing in cybersecurity, artificial intelligence, big data, and fraud prevention for online banking and payment systems, offering cutting-edge solutions globally |
109 | |||
| 28 |
Áudea Seguridad de la Informaciónaudea.com
Áudea is a technology consultancy specializing in information security and new technologies, offering services in legal, management, and technical areas |
84 | |||
| 29 |
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 | |||
| 30 | 14 | ||||
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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.
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