Excellium Services
We ensure cybersecurity of our customers to guarantee their digital sovereignty and build a future we can all trust.
182 employees · est. 2012 · Contern, Luxembourg
S21sec
The biggest Iberian company of cybersecurity services
442 employees · est. 2000 · Madrid, Spain
S21sec is the older company (2012 vs 2000); S21sec is the larger of the two.
Side-by-Side Comparison
| Metric | Excellium Services | S21sec |
|---|---|---|
| Founded | ||
| Founded | 2012 | 2000 older |
| Headquarters | ||
| Headquarters | Contern, Luxembourg | Madrid, Spain |
| Employees | ||
| Employees | 182 | 442 larger |
| Industry | ||
| Industry | Information Technology, Privacy and Security | Cyber Security, Privacy and Security |
| Funding Stage | ||
| Funding Stage | Undisclosed | Grant |
| Total Funding | ||
| Total Funding | Not tracked yet | Not tracked yet |
| Funding Rounds | ||
| Funding Rounds | Not tracked yet | Not tracked yet |
| Services | ||
| Services | Cybersecurity Consultancy and Advisory, Cybersecurity Solutions and Integration, Detection and Response Services, Cyber Governance, Risk, and Compliance, Infrastructure Security Integration, Train and Experiment Services | Not tracked yet |
| Target Customers | ||
| Target Customers | Companies, Organizations, Governments, Airlines, Financial Institutions, Healthcare Providers, Critical National Infrastructure | Not tracked yet |
| Taxonomy | ||
| Taxonomy | Digital Sovereignty, Cybersecurity Consulting, Cybersecurity Solutions Integration, Incident Response, Penetration Testing, Security Operations Center (SOC), Threat Intelligence, Ethical Hacking, Cloud Security, Artificial Intelligence In Cybersecurity, Post-Quantum Cryptography, Cyber Risk Management | Not tracked yet |
| Website | ||
| Website | excellium-services.com | s21sec.com |
About Excellium Services
Excellium Services, founded in 2012 and headquartered in Luxembourg, is a dedicated player in the cybersecurity landscape, focusing exclusively on ensuring the digital safety of its clients. The company positions itself as a guardian of digital sovereignty, aligning with its slogan to build a future...
About S21sec
S21sec is the largest Iberian company of cybersecurity services, providing cutting-edge Cyber Solutions as a part of Thales' cybersecurity activities. With over 400 security experts in Spain and Portugal, S21Sec offers a comprehensive range of services, covering the entire NIST Framework, from cyber...
We will tell you when either one moves
BounceWatch watches Excellium Services and S21sec for new funding, fast hiring, new executives and a change of software vendor. When one happens, we email you the same day.
Funding, hiring, leadership and stack changes at Excellium Services and S21sec — by email.
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Compiled from the BounceWatch company index. We last looked at Excellium Services on 23 Feb 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.