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Knowledge is power

Disrupt attack paths by gaining the insights you need.

Keeping pace with attackers is hard – especially with the constant barrage of new vulnerabilities and an ever-changing attack surface.

Since 1998, Nessus has helped security teams stay a step ahead. It provides the visibility, accuracy and speed you need to protect your organization against unacceptable risk.


#1 in Vulnerability Assessment.
Trusted by Customers.

Nessus Professional on G2: The Leader for Vulnerability Scanner Software

Nessus is a leader in Vulnerability Scanner on G2
Nessus is a leader in Security Risk Analysis on G2
Nessus is a leader in Security Risk Analysis on G2
Nessus is a leader in Security Risk Analysis on G2
Nessus is a leader in Security Risk Analysis on G2
Nessus is a leader in Security Risk Analysis on G2
Users love Nessus on G2

"The flexibility of the program and innovative Tenable technology allow us to build solutions that fit our customers' needs. It’s a key part of how we drive improvement with metrics-driven vulnerability management programs instead of limiting ourselves to one-time vulnerability scanning and assessment services." Jordan Mauriello, CTO of Tenable partner, Critical Start

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. Learn more about the features here.

  • Deploy On Any Platform

    Nessus can be deployed on a variety of platforms, including Raspberry Pi. Regardless of to where you are, where you need to go or how distributed your environment is, Nessus is fully portable. Read the Press Release
  • Efficiency and Accuracy

    Dynamically compiled plug-ins increase scan performance and efficiency, enabling faster completion of the first scan and time to value.
    Top VPR Threats
  • Zero in On Threats That Matter Most

    Market leading coverage so that you know every vulnerability. Leverage the power of Nessus so you can triage and address the threats that matter most.
    Pre-Built Policies and Templates
  • Pre-Built Policies and Templates

    More than 450 pre-configured templates help you quickly understand where you have vulnerabilities. Easily audit configuration compliance against CIS benchmarks and other best practices.
  • Customizable Reporting & Troubleshooting

    Customizable reporting capabilities can be optimized to meet specific needs and are exportable the formats that are most suited for your security process.
    Customizable Reporting
  • Live Results

    Live Results automatically performs an offline vulnerability assessment with every plugin update, showing you where you may have vulnerabilities based on your scan history. From here you can easily run a scan to validate the presence of the vulnerability which accelerates the accurate detection and prioritization of issues.
    Live Results
  • Ease of Use

    Nessus is designed with an intuitive approach to navigation and user experience. This includes a resource center to guide you with actionable tips and guidance on the next steps to take.
  • Grouped View

    Similar issues or categories of vulnerabilities are grouped together and presented in one thread, simplifying the time to research and prioritize issues for remediation. Snoozing lets you select specific issues to disappear from view for a specified period of time. So you only focus on the issues that matter at that time.
    Grouped View
7-Day Free Trial

Nessus Professional Benefits

Easy-to-Use

Easy to deploy, Easy-to-Use

A fully portable VA solution that can be deployed virtually anywhere. Policy creation is simple and only requires a few clicks to scan an entire corporate network.

Advanced Detection Means More Protection

Advanced Detection Means More Protection

65K CVEs – the most in the industry. Nessus scans more technologies and uncovers more vulnerabilities than competing solutions.

Cost Effective for Companies of All Sizes

Cost Effective for Companies of All Sizes

Cost effective for any consultant or team, Nessus provides complete vulnerability scanning with unlimited assessments for one low price.

Accurate Visibility Into Your Networks

Accurate Visibility Into Your Networks

Nessus identifies the vulnerabilities that need attention with high-speed, accurate scanning, and highlights which vulnerabilities should be addressed first.

Plugins Provide Timely Protection

The Power of the Tenable Zero Day Research Team

Tenable researchers leverage extensive intel sources, find and provide protection, from the latest threats via new plugins as needed.

Accommodate Growth and Scale Safely

The Power of Tenable Grows With You

With operability across Tenable’s product portfolio, easily migrate to Tenable.io, leverage the additional insights of Tenable.ot for your industrial environment, or combine with the rest of Tenable the solutions as your vulnerability management needs increase.


"Nessus is the ultimate time saver for vulnerability scanning."

Penetration Tester on G2

Nessus on-demand Training

Interested in learning how to use Nessus? Our on-demand course enables the student, pen tester, consultant and security practitioner, through a series of targeted videos, to develop the building blocks for effective use of the Nessus vulnerability assessment solution. From asset discovery to vulnerability assessment to compliance, participants will learn to effectively utilize Nessus in a variety of business use cases.

Learn More Buy Now for $195

Course Topics

60+ targeted videos and demonstrations covering these topics:

  • Introduction to Cybersecurity
  • Installation
  • Configuration
  • Vulnerability Assessment
  • Compliance Assessment
  • Analysis

Nessus Professional - Built for Security Professionals Like You

Get the world’s most widely deployed vulnerability assessment solution.

Buy Nessus Pro

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. Full details here.

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LEARN MORE

Nessus Professional Data Sheet

Nessus Feature Demo

6 Ways to Optimize your Nessus Scans ebook

Tenable Customers Weigh in on the Vulnerability Assessment Market

Nessus Professional FREE FOR 7 DAYS

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Nessus Professional BUY

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save. Add Advanced Support for access to phone, email, community and chat support 24 hours a day, 365 days a year.

Full details here.

Try for Free Buy Now
Tenable.io FREE FOR 30 DAYS

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Sign up now.

Tenable.io BUY

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

65 assets

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Try Nessus Professional Free

FREE FOR 7 DAYS

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy Nessus Professional

Nessus® is the most comprehensive vulnerability scanner on the market today. Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

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. Full details here.

Try for Free Buy Now

Try Tenable.io Web Application Scanning

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Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable.io platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now.

Buy Tenable.io Web Application Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

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Try Tenable.io Container Security

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Enjoy full access to the only container security offering integrated into a vulnerability management platform. Monitor container images for vulnerabilities, malware and policy violations. Integrate with continuous integration and continuous deployment (CI/CD) systems to support DevOps practices, strengthen security and support enterprise policy compliance.

Buy Tenable.io Container Security

Tenable.io Container Security seamlessly and securely enables DevOps processes by providing visibility into the security of container images – including vulnerabilities, malware and policy violations – through integration with the build process.

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Try Tenable Lumin

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Visualize and explore your Cyber Exposure, track risk reduction over time and benchmark against your peers with Tenable Lumin.

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Contact a Sales Representative to see how Lumin can help you gain insight across your entire organization and manage cyber risk.