Offensys B.V.

Offensys is a Dutch cybersecurity company helping organisations understand whether their security defenses actually work. Our continuous security validation platform automatically simulates realistic cyberattacks within an organisation's own IT environment, revealing which attacks are blocked, detected or missed. This provides security teams with actionable insights to improve their defenses and evidence to demonstrate the effectiveness of their security controls.

Offensys runs realistic attack simulations against your controls and confirms what was blocked, detected, or missed. You get evidence instead of assumptions.

Curated threat library 

Access a constantly updated library of attack techniques grounded in current threat intelligence and real-world adversary tradecraft. 

Continuous regression testing 

Security rules break silently when environments change. Schedule continuous simulations to catch issues before attackers do.

Custom simulation builder 

Adapt to your specific risks. Easily build custom simulations or modify existing playbooks to match your organisation's needs.

Seamless integrations 

We automatically validate if attacks were blocked or detected by integrating with your SIEM, saving you hours of manual verification.

Detection engineering 

Detailed execution traces and telemetry provide the granular insight blue teams need to create and tune high-fidelity detection rules.

Compliance-ready reporting 

Generate evidence-based reports for DORA, NIS2, and other frameworks. Prove that your controls work, not just that they exist.