Company lists · Data verified August 2026

Top 25 Application security consulting firms based in Spain

Name: Application security consulting firms based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 101 companies tracked

There are 101 application security consulting firms headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 1,014 professional contacts across them, including 135 with verified work emails and 13 with mobile numbers. Madrid is the largest hub.

This list covers application security consulting firms 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.

101Companies

1,014Contacts tracked

135Verified emails

13Mobile numbers

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The 25 largest application security consulting firms based in Spain

Ranked by team size

Top 25 of 101 application security consulting firms 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	Tarlogic	n/a	51-200	122	21
2	A2secure	Madrid	51-200	115	24
3	GSS Security	n/a	51-200	89	9
4	Áudea Seguridad DE LA Información	Madrid	51-200	76	6
5	Build38	Barcelona	51-200	48	19
6	Lazarus Technology	San Sebastian De Los Reyes	51-200	43	12
7	Zerolynx	Alcorcon	51-200	37	10
8	Optimumtic	Barcelona	11-50	29	1
9	Gotham Digital Science, A Stroz Friedberg Company	Madrid	51-200	21	1
10	Tecnek Ciberseguridad	Madrid	11-50	20	3
11	Layakk	Paterna	11-50	15	1
12	Ciberso	Madrid	1,001-5,000	14	1
13	Data Adviser	Madrid	51-200	12	3
14	ZEROD	Barcelona	11-50	11	4
15	Cibinar	Murcia	11-50	8	3
16	Blackdogs	Barcelona	1-10	8	1
17	Altair Networks	Madrid	11-50	6	2
18	Bcnsoluciona Ciberseguridad DE Confianza, Siempre Existe UNA Solución	Barcelona	1-10	6	2
19	Aronte	Barcelona	11-50	5	2
20	All4sec	Madrid	1-10	5	1
21	AO Data Cloud	Madrid	11-50	4	1
22	Greyheads	Barcelona	1-10	3	1
23	Asperis Security	Barcelona	1-10	2	2
24	Alisec Soluciones S.L	Llanera	1-10	2	2
25	Eurisko Consulting, S.L.U	Madrid	1-10	2	1

Showing 25 of 101 application security consulting firms based in Spain

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Application security consulting firms based in Spain at a glance

As of Aug 28, 2026

1-10Median size (employees)

MadridLargest hub · 34 HQs

13Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Application security consulting firms by metro

Metro	Companies
Application security consulting firms in Madrid	34
Application security consulting firms in Barcelona	16
Application security consulting firms in Murcia	5
Application security consulting firms in Valencia	3
Application security consulting firms in Malaga	3
Application security consulting firms in Donostia-San Sebastian	2
Application security consulting firms in Valencia Valencia	2

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 “application security consulting firms”, 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; 0 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 application security consulting firms are there based in Spain?

There are 101 application security consulting firms headquartered in Spain as of August 2026 (RevenueBase).

What is the largest company on this list?

Tarlogic, headquartered in Spain, tops this list with the largest team on record.

Which city has the most application security consulting firms?

Madrid leads with 34 headquartered companies, followed by Barcelona (16) and Murcia (5).

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 135 verified decision-maker contacts tracked across these 101 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.