Nessus Professional is a commercial vulnerability assessment solution by Tenable. Terrascan is a free security scanning solution. Features, integrations, deployment and the company behind each one, side by side.
Vulnerability scanner for assessing networks, systems, and apps for security flaws.
Terrascan is a static code analyzer that scans Infrastructure as Code for security misconfigurations and compliance violations across multiple cloud platforms and container environments.
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Based on what each listing shows: deployment, company size, price and open source.
Terrascan fits if you need a free product and you want an open-source product.
Common questions when comparing Nessus Professional vs Terrascan for vulnerability assessment.
Nessus Professional: Vulnerability scanner for assessing networks, systems, and apps for security flaws, built by Tenable.
Terrascan: Terrascan is a static code analyzer that scans Infrastructure as Code for security misconfigurations and compliance violations across multiple cloud platforms and container environments.
The table above shows where their features, integrations, deployment and company size fit differ.
Nessus Professional is made by Tenable. Terrascan is open-source with 5,144 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
In part. Nessus Professional and Terrascan are not in the same category on CybersecTools. Key differences: Nessus Professional is Commercial while Terrascan is Free, Terrascan is open-source. Use the table above to see where features, deployment and company size fit differ.
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Updated 2026-11-01
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