Greenbone OpenVAS vs Tenable

Greenbone OpenVAS is the leading open-source alternative to Tenable, providing free vulnerability scanning with over 100,000 NVTs. While it cannot match Tenable's scanning speed, plugin breadth, or advanced features like attack path analysis and cloud-native scanning, OpenVAS eliminates licensing costs entirely and provides full transparency into scanning logic. It is best suited for organizations with strong Linux expertise that need a cost-effective scanning foundation.

Updated Feb 2026
How we compare:This comparison is based on official documentation, public pricing, community discussions, and aggregated user feedback, not hands-on testing by our team. We organize what real users and practitioners are saying across the web.

The Bottom Line

Choose Greenbone OpenVAS if you need a free, open-source vulnerability scanner and have the Linux expertise to deploy and maintain it. Choose Tenable if you need enterprise-grade scanning speed, cloud-native coverage, risk-based prioritization, and professional support.

Choose Greenbone OpenVAS if:

  • You need enterprise-grade scanning speed and performance
  • Cloud-native, container, and OT/ICS vulnerability scanning is required
  • You want risk-based prioritization with VPR scoring
  • You need a managed cloud platform without infrastructure overhead
  • Enterprise support, SLAs, and compliance certifications are required

Choose Tenable if:

  • You need a vulnerability scanner with zero licensing costs
  • Open-source transparency and code auditability are requirements
  • Your team has strong Linux administration skills for self-hosted deployment
  • You want to customize scanning logic and integrate with custom workflows
  • Budget constraints prevent investment in commercial vulnerability management

Feature Comparison

FeatureGreenbone OpenVASTenable
CostPer-asset commercial licensingFree (open source)
Plugin/NVT Count200,000+ plugins100,000+ NVTs
Scanning SpeedOptimized multi-threaded scanningSlower (single-threaded scans)
Cloud ScanningNative cloud connector scanningNot supported natively
Risk PrioritizationVPR with exploit predictionCVSS-based only
User InterfaceModern web console with dashboardsGreenbone Security Assistant (basic)
Container SecurityTenable.cs container scanningNot supported
Enterprise Support24/7 enterprise support and SLAsCommunity support (or Greenbone Enterprise)

Sources

Related

Greenbone OpenVAS AlternativesTenable AlternativesGreenbone OpenVAS OverviewTenable Overview