Atomic OSSEC by Atomicorp is an extended detection and response (XDR) system built on the open-source OSSEC foundation. It provides comprehensive host intrusion detection, attack protection, and compliance capabilities for cloud, container, and server environments. Atomic OSSEC offers real-time file integrity monitoring, vulnerability scanning and management, threat analysis, and SIEM-based compliance and audit reporting. It runs on any operating system and cloud platform, supporting both modern and legacy architectures across Linux, Windows, AIX, Debian, Ubuntu, HP-UX, Solaris, and end-of-life systems.