Cyllenium

Cyllenium is a cybersecurity company specializing in offensive security and full-spectrum cyber defense. We help businesses identify, simulate, and defend against real-world cyber threats through red team operations, advanced penetration testing, phishing campaigns, and ransomware simulations. With a hands-on, adversary-based approach, we expose vulnerabilities before attackers do—empowering organizations to build stronger, more resilient security postures. Our services also include EDR/XDR integration, OS hardening, and security awareness training, delivering end-to-end protection. Whether you're securing your first network or stress-testing an enterprise environment, Cyllenium is your partner in proactive cybersecurity.