RoboShadow Vulnerability Scanner vs Semperis Purple Knight: Side-by-Side Comparison (2026)

RoboShadow Vulnerability Scanner

Small to mid-market teams without dedicated vulnerability management staff should start here; RoboShadow Vulnerability Scanner's free pricing and automated daily scanning mean you get continuous coverage of both internal Windows apps and external attack surface with near-zero onboarding friction. The 65,535 port range and OWASP Top 10 web scanning handle the scan breadth most organizations actually need, not theoretical completeness. Skip this if you're running hybrid cloud infrastructure or need native integration with your existing SIEM; RoboShadow is built for teams doing straightforward network assessment, not orchestration across multiple environments.

Semperis Purple Knight

Identity and access teams responsible for Active Directory or Entra ID hygiene should start with Purple Knight because it scans 185+ misconfigurations and risky admin patterns that your existing tools are likely missing, then delivers prioritized fixes instead of just a list of problems. The free model means no budget negotiation to run periodic scans across AD, Entra ID, and Okta simultaneously, making it genuinely low friction for gap assessment. Skip this if you need continuous runtime detection of lateral movement or persistence techniques; Purple Knight is a periodic scanner, not a monitor.