Company lists · Data verified August 2026

Top 25 Cybersecurity defense companies based in Spain

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 325 companies tracked

There are 325 cybersecurity defense companies headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 6,138 professional contacts across them, including 1,151 with verified work emails and 121 with mobile numbers. Madrid is the largest hub.

This list covers cybersecurity defense companies 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.

325Companies

6,138Contacts tracked

1,151Verified emails

121Mobile numbers

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The 25 largest cybersecurity defense companies based in Spain

Ranked by team size

Top 25 of 325 cybersecurity defense companies 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	Alhambra IT	Madrid	201-500	228	26
5	S21sec	Madrid	201-500	192	36
6	Govertis	Valencia	51-200	182	44
7	Attackiq	Barcelona	51-200	158	74
8	Secure&it	Las Rozas De Madrid	51-200	145	9
9	YARIX	Madrid	201-500	131	67
10	A3sec	Madrid	51-200	122	24
11	Tarlogic	n/a	51-200	122	21
12	A2secure	Madrid	51-200	115	24
13	Wise Security Global	Barcelona	51-200	107	18
14	Innotec Security	Madrid	501-1,000	105	14
15	Aiuken Cybersecurity	Boadilla Del Monte	51-200	104	21
16	Tautenet	Madrid	51-200	93	11
17	Áudea Seguridad DE LA Información	Madrid	51-200	76	6
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 325 cybersecurity defense companies based in Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,151 reachable decision-makers.

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Cybersecurity defense companies based in Spain at a glance

As of Aug 28, 2026

1-10Median size (employees)

MadridLargest hub · 102 HQs

121Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

170

11-50

107

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Cybersecurity defense companies by metro

Metro	Companies
Cybersecurity defense companies in Madrid	102
Cybersecurity defense companies in Barcelona	47
Cybersecurity defense companies in Malaga	15
Cybersecurity defense companies in Valencia	8
Cybersecurity defense companies in Murcia	7
Cybersecurity defense companies in Sevilla	6
Cybersecurity defense companies 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 companies”, 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 companies are there based in Spain?

There are 325 cybersecurity defense companies 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 companies?

Madrid leads with 102 headquartered companies, followed by Barcelona (47) 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 1,151 verified decision-maker contacts tracked across these 325 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.