DEFION Security
DEFION Security is an independent security partner that has operated since 2005.
- Categories
- Managed detection and response, Penetration testing, Incident response, Security consulting and vCISO
- Based in
- Zoetermeer, Netherlands
- Founded
- 2005
- Ownership
- Private
- Certifications
- ISO 27001, SOC 2, TF-CSIRT
About DEFION Security
DEFION Security is an independent security partner that has operated since 2005. It provides offensive security expertise alongside AI-driven analysis. The company does not sell products, only protection, and its recommendations are free from vendor sales quotas. It serves organisations that need to defend against attackers who use AI. DEFION offers services across the security lifecycle. These include security assessments, CISO as a Service, penetration testing, technical security reviews, 24/7 managed detection and response, incident response, digital forensics, and business continuity and recovery. It also provides DDoS, load, endurance and stress testing. The company operates from Zoetermeer and Barcelona with over 100 experts. DEFION differentiates itself through its independence, its use of AI to filter alerts while human analysts make decisions, and its contractual SLAs for P1 incidents. It monitors endpoints, network, cloud, email and OT. Its detection rules are derived from its own Red Team and pentest findings. Clients receive only alerts that matter, with detection in minutes rather than days.