Excellium Services vs S21sec
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 | Not tracked yet | Grant |
| 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 SovereigntyCybersecurity ConsultingCybersecurity Solutions IntegrationIncident ResponsePenetration TestingSecurity Operations Center (SOC) +6 | 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...
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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.
