Nessus Professional vs ThreatMapper: side-by-side comparison (2026)

Nessus Professional: Vulnerability scanner for assessing networks, systems, and apps for security flaws. Built by Tenable.

ThreatMapper: A runtime threat management and attack path enumeration tool for cloud-native environments.

The table above shows where their features, integrations, deployment and company size fit differ.

Nessus Professional is made by Tenable. ThreatMapper is open-source with 5,236 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. Nessus Professional and ThreatMapper are both Vulnerability Assessment products, and both cover CVE. Key differences: Nessus Professional is Commercial while ThreatMapper is Free, ThreatMapper is open-source. Use the table above to see where features, deployment and company size fit differ.