Company lists · Data refreshed September 2026

Top 22 IT services companies based in Madrid, Spain

Name: IT services companies based in Madrid, Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 347 companies tracked

RevenueBase identified 347 IT services companies headquartered in Madrid, Spain as of September 2026 and tracks 40,008 professional contacts across them, including 1,596 with verified work emails. Madrid is the largest hub.

This list covers IT services companies headquartered in Madrid, Spain, 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

347Companies

40,008Contacts tracked

1,596Verified emails

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The 22 largest IT services companies based in Madrid, Spain

Ranked by team size

Top 22 of 347 IT services companies based in Madrid, Spain, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT services companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	OptimissaIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	1,001-5,000	527
	“Optimissa is a proactive consultation company serving clients in the capital markets industry, bridging the gap between business and technology with a focus on innovation.” Source: company website · checked Sep 4, 2026
2	AtsistemasStrong evidence	Madrid, SpainHQ checked Sep 4, 2026	1,001-5,000	391
	“With about 2200 experts atSistemas delivers IT consulting, services and software development which to help organizations to be more efficient and profitable.” Source: company website · checked Sep 4, 2026
3	IRIUMIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	501-1,000	363
	“No dejes de perseguir tus sueños.” Source: company website · checked Sep 4, 2026
4	Grupo Tecdata EngineeringIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	347
	“TECDATA, es una dinámica compañía de servicios en Tecnologías de la Información con infraestructura propia en España, ofreciendo servicios profesionales y soluciones tecnológicas…” Source: company website · checked Sep 4, 2026
5	Panel Sistemas InformaticosStrong evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	303
	“Panel Systems is a technology company specialized in software development, software quality assurance, and IT services.” Source: company website · checked Sep 4, 2026
6	Serem Consultoría EmpresarialStrong evidence	Madrid, SpainHQ checked Sep 4, 2026	501-1,000	220
	“Fundada en 1995, SEREM Consultoría Empresarial es una firma de capital íntegramente nacional dedicada a servicios de tecnologías de información (IT).” Source: company website · checked Sep 4, 2026
7	LognextStrong evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	214
	“With more than 17 years of experience and trajectory in the IT world, LOGNEXT offers solutions to our clients and professional careers to our consultants in technology projects…” Source: company website · checked Sep 4, 2026
8	CAS TrainingIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	197
	“CAS constituye una empresa de referencia, especializada en ofrecer soluciones de Formación y servicios de Consultoría y Outsourcing de profesionales en el ámbito de las TIC.” Source: company website · checked Sep 4, 2026
9	MercanzaIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	180
	“En MERCANZA desarrollamos soluciones tecnológicas de gestión empresarial y análisis de Negocio desde 1991, en apoyo de todo tipo de actividades empresariales y en todos los…” Source: company website · checked Sep 4, 2026
10	FDS Spain, A DXC Technology CompanyStrong evidence	Madrid, SpainHQ checked Sep 4, 2026	1,001-5,000	179
	“FDS es una compañía perteneciente a DXC Technology, empresa global de servicios de IT.” Source: company website · checked Sep 4, 2026
11	MindataIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	n/a	175
	“es una ó, ayudamos a nuestros clientes a resolver sus principales retos en el campo de las tecnologías de la información.” Source: company website · checked Sep 4, 2026
12	Airon GroupIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	162
	“El Grupo AirON es una compañía de consultoría e innovación, servicios tecnológicos y outsourcing.” Source: company website · checked Sep 4, 2026
13	Seidor GeseinIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	160
	“Gesein nace en 1993 en Madrid.” Source: company website · checked Sep 4, 2026
14	AELISIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	51-200	153
	“AELIS es una empresa de soluciones informáticas especializada en Pymes, cuya actividad está orientada a la prestación de servicios de valor añadido en el ámbito de los sistemas de…” Source: company website · checked Sep 4, 2026
15	Innocv SolutionsIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	51-200	151
	“INNOCV es una empresa sostenible que se diferencia por poner a las personas en el centro de sus decisiones, mejoramos cada año la calidad de vida de los que trabajamos en ella…” Source: company website · checked Sep 4, 2026
16	SearchitIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	51-200	143
	“Search Information Technologies & Communication es una empresa innovadora y dinámica especializada en brindar soluciones tecnológicas avanzadas en el ámbito de las tecnologías de…” Source: company website · checked Sep 4, 2026
17	Grupo SolutioIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	123
	“Grupo Solutio, compañía del sector TI con sedes en España (Madrid, Barcelona, A Coruña) y México (México DF).” Source: company website · checked Sep 4, 2026
18	General Technologies ConsultingStrong evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	109
	“General Software (General Technologies Consulting) se estableció en 2003 como compañía proveedora de Servicios de IT.” Source: company website · checked Sep 4, 2026
19	DimáticaIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	107
	“Dimática, empresa del Grupo Sermicro (perteneciente a Cobra IS), está especializada en distíntas líneas de negocio.” Source: company website · checked Sep 4, 2026
20	Inforein Grupo SolitiumIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	201-500	106
	“INFOREIN Somos una empresa española especializada en el suministro, instalación y servicios informáticos, consultoría tecnológica, integración de sistemas e ingeniería de procesos.” Source: company website · checked Sep 4, 2026
21	Alcorce Telecomunicaciones SLIndirect evidence	Madrid, SpainHQ checked Sep 4, 2026	51-200	102
	“Cada día nos esforzamos por transformar y optimizar organizaciones mediante la implementación de soluciones tecnológicas seguras, eficientes y vanguardistas, evolucionamos contigo…” Source: company website · checked Sep 4, 2026
22	FactumStrong evidence	Madrid, SpainHQ checked Sep 4, 2026	51-200	99
	“Factum IT is an IT services company with a strong delivery team focused on security, network solutions, open systems, storage, Database and virtualization.” Source: company website · checked Sep 4, 2026

Showing 22 of 347 IT services companies based in Madrid, Spain

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IT services companies based in Madrid, Spain at a glance

As of Sep 4, 2026

11-50Median size (employees)

MadridLargest hub · 347 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

155

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole Spain list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Madrid, over 347 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 IT services companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Madrid, Spain whose own description of what they do matches “IT services companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among IT services companies, and records with no verified work email. Companies headquartered outside Madrid 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 an evidence 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, 1,596 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 4, 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.

IT services companies by metro in Spain

Frequently asked

How many IT services companies are there based in Madrid, Spain?

RevenueBase identified 347 IT services companies headquartered in Madrid, Spain 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?

Optimissa, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most IT services companies?

Madrid leads with 347 headquartered companies, followed by Barcelona (188) and Valencia (48).

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 1,596 verified decision-maker contacts tracked across these 347 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 4, 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 SmartSearch, 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.