Fortra VM is a commercial vulnerability assessment solution by Fortra. Semperis Purple Knight is a free vulnerability assessment solution by Semperis. Features, integrations, deployment and the company behind each one, side by side.
Risk-based vulnerability management platform for scanning and prioritization
Free AD, Entra ID, and Okta security assessment tool for vulnerability scanning
See more solutions in this category, or build a security stack from your picks.
Based on what each listing shows: deployment, company size, price and open source.
Semperis Purple Knight fits if you are a startup and you need a free product.
Common questions when comparing Fortra VM vs Semperis Purple Knight for vulnerability assessment.
Fortra VM: Risk-based vulnerability management platform for scanning and prioritization. Built by Fortra. Core capabilities include Vulnerability scanning and identification, Risk-based vulnerability prioritization, Threat ranking based on real-world exploitation vectors.
Semperis Purple Knight: Free AD, Entra ID, and Okta security assessment tool for vulnerability scanning. Built by Semperis.
The table above shows where their features, integrations, deployment and company size fit differ.
Fortra VM is made by Fortra. Semperis Purple Knight is made by Semperis. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. Fortra VM and Semperis Purple Knight are both Vulnerability Assessment products. Key differences: Fortra VM is Commercial while Semperis Purple Knight is Free. Use the table above to see where features, deployment and company size fit differ.
No Vulnerability Assessment shortlist yet. This is the closest one.
Updated 2026-11-02
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