Tenable
Nessus®
The first tool in your cybersecurity toolbox
Expose and close weaknesses across your constantly changing attack surface with the industry’s most trusted vulnerability assessment solution.
Try Tenable Nessus Professional free
Tenable Nessus is the most comprehensive vulnerability scanner on the market today. Fill out the form below to continue with a Nessus Pro trial.
Unlimited vulnerability assessments you can use anywhere
Quickly identify security issues
Find flaws, missing patches, and misconfigurations across OS, devices, and apps. Use fast vulnerability scans to expose critical risk.
Remediate with guided workflows
Get remediation guidance to close gaps faster. Streamline collaboration across IT and security to quickly reduce cyber risk.
The global gold standard in vulnerability assessment
Nessus Professional
- Unlimited IT vulnerability assessments
- Vulnerability scoring with CVSS v4, EPSS and VPR (for Top 10 Vulns)
- Configuration, compliance, and security audits
- Use anywhere
- Configurable reports
- Community support
- Advanced support (available as an option)
- On-demand training (available as an option)
- Web application scans (5 FQDNs with the option to add more)
- External attack surface scans
Nessus Expert
- Unlimited IT vulnerability assessments
- Vulnerability scoring with CVSS v4, EPSS and VPR (for Top 10 Vulns)
- Configuration, compliance, and security audits
- Use anywhere
- Configurable reports
- Community support
- Advanced support (available as an option)
- On-demand training (available as an option)
- Web application scans (5 FQDNs with the option to add more)
- External attack surface scans
Unlimited vulnerability assessments you can use anywhere
in accuracy
in adoption
in hearts and minds
See how Nessus compares to other solutions on the market.
Nessus is #1 for vulnerability assessment
We’ve always prioritized collaboration with the vulnerability analysts using our beloved Nessus scanner every day. For over twenty-six years, this partnership has driven continuous innovation and optimization, ensuring that Nessus remains the most accurate and comprehensive vulnerability assessment solution on the market. Our unwavering focus on community feedback guarantees we deliver the complete, high-fidelity vulnerability data you need to address critical risks.
Today, Nessus is trusted by tens of thousands of organizations worldwide. It’s one of the most widely deployed security technologies on the planet, and it powers the Tenable One Exposure Management Platform.
Tenable’s Zero Day Research provides 24/7 updates into new and emergent vulnerabilities so you’ll always have full situational awareness.
Tenable Nessus reviews
Tenable is the only vendor to be named a Customers’ Choice in the 2025 Gartner® Peer InsightsTM Voice of the Customer for Vulnerability Assessment
Built by practitioners
Nessus is built from the ground-up with a deep understanding of how security practitioners work. Every feature in Nessus is designed to make vulnerability assessment simple, easy and intuitive. The result: less time and effort to assess, prioritize, and remediate issues.
Any platform
Deploy on any platform
You can deploy Nessus on a variety of platforms, including Raspberry Pi. Nessus is there with you, no matter where you are, where you're headed or how distributed your environment is.
Efficiency and accuracy
Efficiency and accuracy
Our dynamically compiled plugins increase scan performance and efficiency, so you can complete the first scan quickly and improve time to value.
Zero in on threats
Zero in on threats that matter most
With market-leading coverage, Nessus knows every vulnerability. The power of Nessus lets you triage and address the threats that matter most.
Pre-built policies and templates
Pre-built policies and templates
With more than 450 pre-configured templates, Nessus helps you quickly understand where you have vulnerabilities.
Customizable reporting & troubleshooting
Customizable reporting & troubleshooting
Nessus helps you optimize reports to meet your needs. Plus, you can export them in formats that work for your security process.
Live results
Live results
Nessus Live Results automatically performs offline vulnerability assessments with every plugin update. You’ll see where your vulnerabilities are based on your scan history.
Ease of use
Ease of use
Nessus takes an intuitive approach to navigation and user experience. And with our resource center, you’ll be armed with actionable tips and guidance on the next steps to take.
Grouped view
Grouped view
Nessus groups similar issues and vulnerability categories together and presents them in one thread, which simplifies researching and prioritizing issues for remediation.
Key use cases for Nessus practitioners
Nessus is the world’s No. 1 vulnerability scanning solution. Learn how Tenable customers put it to work in a range of critical situations.
Learn moreNetwork pen testers play a unique role in the IT security ecosystem
Before executing full breach simulations, pen testers use Nessus first to find where those major vulnerabilities are hiding.
Cybersecurity students are invaluable to this highly specialized field
Professors use Nessus with cybersecurity students in vulnerability assessment and management courses as a foundational tool to get them up to speed on the essentials of uncovering vulnerabilities.
Cybersecurity consultants play pivotal roles in a constantly shifting threat and vulnerability landscape
Cybersecurity consultants use Nessus to scour clients’ networks for vulnerabilities and create comprehensive reports that summarize security posture and contain key suggestions for remediation.
In years past, small and medium-sized businesses might have considered themselves effectively immune to cyberattacks.
With Nessus, even small companies that lack full-time cybersecurity staff can stay on top of vulnerabilities, customizing comprehensive scans to meet unique business needs.
To learn more about Nessus features and functionality, visit our Nessus documentation page.
To learn more about purchasing options, please contact your preferred reseller or visit our online store.
Nessus
Professional—
Built for security professionals like you
Get the world’s most widely deployed vulnerability assessment solution.
Buy Tenable Nessus Professional
Buy a multi-year license and save. Add Advanced Support for access to phone, community, and chat support 24 hours a day, 365 days a year.
Customers rely on Nessus to stay safe
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