Action1 Free Initial Vulnerability Assessment vs Semperis Purple Knight: Side-by-Side Comparison (2026)

Action1 Free Initial Vulnerability Assessment: Free vulnerability assessment for unlimited endpoints with patching capabilities. built by Action1. Core capabilities include Unlimited endpoint vulnerability assessment, OS vulnerability detection for Windows workstations and servers, Third-party application vulnerability detection..

Semperis Purple Knight: Free AD, Entra ID, and Okta security assessment tool for vulnerability scanning. built by Semperis. Core capabilities include Scans for 185+ indicators of exposure and indicators of compromise, Security assessment for Active Directory, Entra ID, and Okta, Security report card with scores across five categories..

Both serve the Vulnerability Assessment market but differ in approach, feature depth, and target audience.

Action1 Free Initial Vulnerability Assessment differentiates with Unlimited endpoint vulnerability assessment, OS vulnerability detection for Windows workstations and servers, Third-party application vulnerability detection. Semperis Purple Knight differentiates with Scans for 185+ indicators of exposure and indicators of compromise, Security assessment for Active Directory, Entra ID, and Okta, Security report card with scores across five categories.

Action1 Free Initial Vulnerability Assessment is developed by Action1. Semperis Purple Knight is developed by Semperis. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Action1 Free Initial Vulnerability Assessment and Semperis Purple Knight serve similar Vulnerability Assessment use cases: both are Vulnerability Assessment tools. Key differences: Action1 Free Initial Vulnerability Assessment is Commercial while Semperis Purple Knight is Free. Review the feature comparison above to determine which fits your requirements.