Company lists · Data verified August 2026

Top 25 Cybersecurity defense contractors based in Spain

Name: Cybersecurity defense contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 294 companies tracked

There are 294 cybersecurity defense contractors headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 6,068 professional contacts across them, including 1,121 with verified work emails and 135 with mobile numbers. Madrid is the largest hub.

This list covers cybersecurity defense contractors headquartered in Spain, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

294Companies

6,068Contacts tracked

1,121Verified emails

135Mobile numbers

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The 25 largest cybersecurity defense contractors based in Spain

Ranked by team size

Top 25 of 294 cybersecurity defense contractors based in Spain, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	SIA Group	Alcobendas	1,001-5,000	704	31
2	Advens	Barcelona	501-1,000	588	314
3	MNEMO	Madrid	501-1,000	444	10
4	Panda Security	Bilbao	501-1,000	329	22
5	Alhambra IT	Madrid	201-500	228	26
6	S21sec	Madrid	201-500	192	36
7	Govertis	Valencia	51-200	182	44
8	Attackiq	Barcelona	51-200	158	74
9	Secure&it	Las Rozas De Madrid	51-200	145	9
10	YARIX	Madrid	201-500	131	67
11	A3sec	Madrid	51-200	122	24
12	Tarlogic	n/a	51-200	122	21
13	A2secure	Madrid	51-200	115	24
14	Wise Security Global	Barcelona	51-200	107	18
15	Innotec Security	Madrid	501-1,000	105	14
16	Aiuken Cybersecurity	Boadilla Del Monte	51-200	104	21
17	Tautenet	Madrid	51-200	93	11
18	Hispasec	Malaga	51-200	68	11
19	Neverhack Spain	Barcelona	51-200	65	13
20	Dltcode	Madrid	11-50	59	24
21	Bedisruptive	Madrid	51-200	54	26
22	Atalanta Cybersecurity & Digital	Madrid	51-200	49	11
23	Ackcent Cybersecurity	n/a	51-200	48	12
24	Gestinet Internet Informàtica	Valencia	51-200	48	12
25	Softeng	Barcelona	11-50	46	16

Showing 25 of 294 cybersecurity defense contractors based in Spain

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Cybersecurity defense contractors based in Spain at a glance

As of Aug 28, 2026

1-10Median size (employees)

MadridLargest hub · 93 HQs

135Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

153

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Cybersecurity defense contractors by metro

Metro	Companies
Cybersecurity defense contractors in Madrid	93
Cybersecurity defense contractors in Barcelona	42
Cybersecurity defense contractors in Malaga	15
Cybersecurity defense contractors in Valencia	8
Cybersecurity defense contractors in Murcia	6
Cybersecurity defense contractors in Sevilla	5
Cybersecurity defense contractors in Lleida	5

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity defense contractors”, with match quality audited by blind human judging, and headquartered in Spain.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity defense contractors are there based in Spain?

There are 294 cybersecurity defense contractors headquartered in Spain as of August 2026 (RevenueBase).

What is the largest company on this list?

SIA Group, headquartered in Alcobendas, tops this list with the largest team on record.

Which city has the most cybersecurity defense contractors?

Madrid leads with 93 headquartered companies, followed by Barcelona (42) and Malaga (15).

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 1,121 verified decision-maker contacts tracked across these 294 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.