Features, pricing, ratings, and pros & cons — compared head-to-head.
Halo Security Server Scanning is a commercial vulnerability assessment tool by Halo Security. Semperis Purple Knight is a free vulnerability assessment tool by Semperis. Compare features, ratings, integrations, and community reviews side by side to find the best vulnerability assessment fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Startups and SMBs that need visibility into external-facing infrastructure without managing agents should start with Halo Security Server Scanning. The agentless model means you're scanning production servers within minutes of signup, and the real-time Slack alerting actually gets findings in front of the right person before they disappear from memory. This tool prioritizes detection over remediation tracking, so teams expecting tight ticketing integration or drift remediation will need to bolt on a separate system.
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.
External server vulnerability scanning for CVEs, patches, and misconfigurations
Free AD, Entra ID, and Okta security assessment tool for vulnerability scanning
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Common questions about comparing Halo Security Server Scanning vs Semperis Purple Knight for your vulnerability assessment needs.
Halo Security Server Scanning: External server vulnerability scanning for CVEs, patches, and misconfigurations. built by Halo Security. Core capabilities include Known vulnerability detection using CVE database, CVSS scoring for vulnerability severity assessment, Out-of-date software identification..
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.
Halo Security Server Scanning differentiates with Known vulnerability detection using CVE database, CVSS scoring for vulnerability severity assessment, Out-of-date software identification. 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.
Halo Security Server Scanning is developed by Halo Security. 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.
Halo Security Server Scanning and Semperis Purple Knight serve similar Vulnerability Assessment use cases: both are Vulnerability Assessment tools, both cover Misconfiguration. Key differences: Halo Security Server Scanning is Commercial while Semperis Purple Knight is Free. Review the feature comparison above to determine which fits your requirements.
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