Capsule8

Capsule8, now part of Sophos, is a powerful runtime protection and detection platform built specifically for securing Linux systems in production environments, whether on bare metal, virtual machines, containers, or cloud infrastructure. Unlike traditional endpoint detection and response (EDR) tools that can be intrusive or ill-suited for Linux, Capsule8 is designed with performance and reliability in mind, making it ideal for high-uptime, resource-sensitive environments such as cloud-native applications, microservices, and DevOps-driven infrastructures. Its agent provides real-time visibility into system-level events—such as process execution, privilege escalations, kernel exploits, and suspicious network behavior—without relying on kernel modules, which reduces the risk of system crashes or compatibility issues. Capsule8's strength lies in its ability to detect both known and unknown threats by analyzing behavioral patterns rather than depending solely on signatures or indicators of compromise. It supports automated response mechanisms that can disrupt or contain threats in real time, such as killing processes or isolating affected workloads, thereby reducing the window of opportunity for attackers.