WorkOS Radar is a real-time protection system that makes split-second decisions about every authentication attempt hitting an application. It builds on top of AuthKit, WorkOS's authentication SDK, and can be activated by contacting the WorkOS team. Radar uses device fingerprinting to identify bot attacks, brute force attempts, "impossible travel" (suspiciously rapid changes in location), stale account compromise, unrecognized devices, and custom restrictions based on IP ranges, user agents, device types, and individual users. The system tracks authentication activity in real-time, providing a comprehensive view of the application's security through its dashboard, which includes charts, detailed cards, and an event list that can be filtered by detection type, action taken, or specific users. Radar's sophisticated decision-making process evaluates each authentication attempt through a multi-stage pipeline to detect threats and take appropriate action based on the organization's security settings.