Insights

Global Security Expertise S21sec is part of Thales, a leading global cybersecurity provider with a vast team of over 6,000 experts and solutions deployed in 148 countries, indicating a strong capacity for comprehensive and scalable cybersecurity services that can appeal to multinational clients seeking enterprise-level security.

Recent Acquisition Strength Having been acquired by Thales in 2022 for $130 million and previously by Sonaeim in 2014, S21sec’s ownership history demonstrates ongoing investment and strategic positioning, making it an attractive partner for clients looking for financially stable, well-supported cybersecurity providers.

Diverse Service Portfolio S21sec offers a wide range of cybersecurity services including consulting, technology integration, and 24/7 detection and response from multiple Security Operations Centers, providing opportunities for tailored solutions across different industries like finance, transportation, and government.

Industry Focus Opportunities With experience in critical sectors such as aerospace, defense, and government, S21sec can serve clients in highly regulated and sensitive industries needing advanced protection and incident response, presenting cross-sell opportunities for specialized cybersecurity solutions.

Technological Capabilities Utilizing a modern tech stack with tools like Palo Alto Networks, VMware, and Infoblox, S21sec is well-positioned to engage clients seeking cutting-edge cybersecurity technology integrations, especially those interested in cloud, network, and data security enhancement.

S21sec Tech Stack

S21sec uses 8 technology products and services including Ansible, Thales, Infoblox, and more. Explore S21sec's tech stack below.

  • Ansible
    Configuration Management
  • Thales
    Data Security
  • Infoblox
    Domain Name Services
  • Palo Alto Networks
    Network Security
  • PHP
    Programming Languages
  • Google
    Search Engines
  • Yoast SEO
    Search Engines
  • VMware
    Virtualisation Software

S21sec's Email Address Formats

S21sec uses at least 1 format(s):
S21sec Email FormatsExamplePercentage
FLast@s21sec.comJDoe@s21sec.com
92%
First@s21sec.comJohn@s21sec.com
5%
FirstLast@s21sec.comJohnDoe@s21sec.com
2%
FL@s21sec.comJD@s21sec.com
1%

Frequently Asked Questions

Where is S21sec's headquarters located?

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S21sec's main headquarters is located at Edificio Fiteni II, C. de Emilio Vargas, 1, planta 2º, Madrid, Comunidad de Madrid 28043, ES. The company has employees across 4 continents, including EuropeNorth AmericaAsia.

What is S21sec's official website and social media links?

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S21sec's official website is s21sec.com and has social profiles on LinkedInCrunchbase.

What is S21sec's SIC code NAICS code?

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S21sec's SIC code is 3699 - Electrical Machinery, Equipment, and Supplies, Not Elsewhere NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does S21sec have currently?

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As of October 2025, S21sec has approximately 389 employees across 4 continents, including EuropeNorth AmericaAsia. Key team members include Ceo: P. E.Cto: I. U. B.Chief Operating Officer: P. L.. Explore S21sec's employee directory with LeadIQ.

What industry does S21sec belong to?

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S21sec operates in the Computer and Network Security industry.

What technology does S21sec use?

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S21sec's tech stack includes AnsibleThalesInfobloxPalo Alto NetworksPHPGoogleYoast SEOVMware.

What is S21sec's email format?

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S21sec's email format typically follows the pattern of FLast@s21sec.com. Find more S21sec email formats with LeadIQ.

When was S21sec founded?

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S21sec was founded in 2000.

S21sec

Computer and Network SecuritySpain201-500 Employees

Thales S21Sec is a leading European cybersecurity pure player, with more than 400 security experts in Spain and Portugal and an Iberian SOC. S21Sec is part of the cybersecurity activities of Thales. S21Sec works with its clients globally to enable their business transformation by managing their cybersecurity risks and protecting our client’s people and assets. We can cover organization’s needs across all the NIST Framework, from Defining their Cybersecurity Strategy to Responding to the most complex cybersecurity incidents. 

Drawing on a team of 6,000 experts and developers, Thales is a global leader in cybersecurity – no.1 in data security - with solutions deployed in 148 countries, generating annual revenues in excess of €2 billion in the domain.
 
Thales supports its enterprise and government customers in the cybersecurity of their digital transformation and contribute to the identification and control of cyber risks, ensure the implementation of best reduction practices, operate cyber incident detection and response services, and intervene with our clients when attacks materialize.
 
Drawing on this and on the expertise about industrial and critical systems, the services were deployed to cover the needs in the fields of transportation, aerospace, defense, government administrations, and finance in three operating models:
· Cybersecurity Consulting and Architecture: Aimed at deploying a cybersecurity strategy adapted to the business and regulatory challenges of clients.
· Cybersecurity Solutions Integration: Aimed at deploying technologies adapted to the challenges of organizations and at protecting their assets.
· Detection and Response Services: Delivered from 11 Security Operations Centers(SOCs) around the world, these services detect attacks against monitored systems 24/7, and respond to them using our rapid intervention forces.

Thales invests in the continuous development of its portfolio by leveraging the latest technologies.

Section iconCompany Overview

Headquarters
Edificio Fiteni II, C. de Emilio Vargas, 1, planta 2º, Madrid, Comunidad de Madrid 28043, ES
Website
s21sec.com
SIC Code
3699 - Electrical Machinery, Equipment, and Supplies, Not Elsewhere
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
2000
Employees
201-500

Section iconFunding & Financials

  • $10M$25M

    S21sec's revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    S21sec's revenue is estimated to be in the range of $10M$25M

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