Company lists · Data refreshed September 2026
Top 13 Data center based in Spain
RevenueBase identified 40 data center headquartered in Spain as of September 2026 and tracks 799 professional contacts across them, including 115 with verified work emails and 8 with mobile numbers. Madrid is the largest hub.
This list covers data center headquartered in 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 7, 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.
The 13 largest data center based in Spain
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Indirect evidence | 276 contacts → | |||
“acens, perteneciente al Grupo acens Technologies, es una empresa proveedora de servicios de “Hosting”, “Housing” y Soluciones de Telecomunicaciones para el mercado empresarial.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 2 | Strong evidence | 88 contacts → | |||
“Quark es una compañía líder en Arquitectura, Ingeniería y Project Management para Data Centers, que asesora a las empresas más avanzadas tecnológicamente.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 3 | Indirect evidence | 60 contacts → | |||
“Nabiax is the leading company of the Colocation industry in Spain.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 4 | Indirect evidence | 28 contacts → | |||
“Cartagon is the leading provider of Managed Cloud Services in Spain, specialized in hybrid cloud solutions.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 5 | Strong evidence | 25 contacts → | |||
“We are a neutral data center provider with 30 years of experience, 18 of them managing critical infrastructure in our own Data Centers in Madrid and Barcelona.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 6 | Strong evidence | 19 contacts → | |||
“Walhalla is the only Spanish cloud provider offering a Tier IV Data Center, as certified by the Uptime Institute.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 7 | Indirect evidence | 16 contacts → | |||
“No somos un proveedor de hosting más.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 8 | Strong evidence | 16 contacts → | |||
“In its Madrid Data Center, it provides server and rack hosting services, monitoring, operation and administration of information systems, and hosting and operating…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 9 | Indirect evidence | 11 contacts → | |||
“Axentio es una empresa joven compuesta por un equipo de profesionales con más de 15 años de experiencia en el sector.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 10 | Partial evidence | 10 contacts → | |||
“Somos una plataforma dedicada al desarrollo y la operación de centros de datos sostenibles, cuyo objetivo es ofrecer soluciones para satisfacer la creciente demanda del sector…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 11 | Indirect evidence | 9 contacts → | |||
“Interhost es una empresa especializada en alojamiento de Sistemas de Información y gestión de CPD, de capital enteramente español, integrada en el Grupo SATEC, con dieciocho años…” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 12 | Strong evidence | 7 contacts → | |||
“Sierra DC owns and operates large (30-100 MW) green powered data centers for the future of AI, machine learning, IoT, ERP and cloud services in Europe, Africa and Middle East.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
| 13 | Indirect evidence | 5 contacts → | |||
“Cyberneticos provides hosting, VPS, dedicated servers and domain solutions for companies, agencies and digital projects that need reliable, secure and scalable infrastructure.” Source: company website · checked Sep 7, 2026Thanks. The Data Team will review it. | |||||
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: data center. 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 data center.
- Partial evidence
- Its own public description names part of data center, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name data center. 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 13 of 40 data center based in Spain
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Data center based in Spain at a glance
As of Sep 7, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 data center, 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 Spain whose own description of what they do matches “data center”. 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 data center), 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 data center, and records with no verified work email. Companies headquartered outside Spain 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, 115 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 7, 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 data center, 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 data center are there based in Spain?
RevenueBase identified 40 data center headquartered in 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?
ACENS, headquartered in Alcobendas, tops this list with the largest team on record.
Which city has the most data center?
Madrid leads with 17 headquartered companies, followed by Barcelona (3) and Malaga (3).
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 115 verified decision-maker contacts tracked across these 40 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 7, 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.