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Products
Nessus

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 for free

Unlimited vulnerability assessments you can use anywhere

Know your vulnerabilities

Identify software flaws, missing patches, and misconfigurations across operating systems, devices, and applications with fast, accurate scans that eliminate blind spots.

Expose the threats that matter

Cut through the noise by highlighting the vulnerabilities that pose the greatest risk, with built-in compliance checks, CVSS and EPSS risk scoring, and easy-to-read reports to guide focus.

Close the gaps faster

Move from findings to fixes with clear remediation guidance and streamlined collaboration between IT and security teams to reduce risk quickly.

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

Try Buy Learn more

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

Try Buy Learn more

Tenable Nessus ranks at the top

#1

in accuracy

Nessus has the industry's lowest false positive rate with six-sigma accuracy.

*.32 defects per 1 million scans

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#1

in coverage

Nessus has the deepest and broadest vulnerability coverage in the industry.

See how

#1

in adoption

Nessus is trusted by tens of thousands of organizations, with 2 million downloads worldwide.

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#1

in hearts and minds

Don't just take our word for it. Security practitioners around the world put their trust in Nessus.

See how Nessus compares to other solutions on the market.

Nessus is #1 For Vulnerability Assessment

From the beginning, we've worked hand-in-hand with the security community. We continuously optimize Nessus based on community feedback to make it the most accurate and comprehensive vulnerability assessment solution in the market. Twenty-five years later and we're still laser focused on community collaboration and product innovation to provide the most accurate and complete vulnerability data — so you don't miss critical issues which could put your organization at risk.

Today, Nessus is trusted by tens of thousands of organizations worldwide as one of the most widely deployed security technologies on the planet — and the gold standard for vulnerability assessment.

See for yourself - explore the product here

113K+

CVEs

295,000+

plugins

100+

new plugins released weekly

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 Insights™ Voice of the Customer for Vulnerability Assessment

Read the Report Explore the reviews GPI Review IT Security & Risk Management Associate in the Education Industry

GPI Review IT Security Manager in the Manufacturing Industry

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

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.

Read the press release
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 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
With more than 450 pre-configured templates, Nessus helps you quickly understand where you have vulnerabilities.
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
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
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
Nessus groups similar issues and vulnerability categories together and presents them in one thread, which simplifies researching and prioritizing issues for remediation.

Customizable Reporting & Troubleshooting

Key use cases for Nessus

Nessus is the world’s No. 1 vulnerability scanning solution. Learn how Tenable customers put it to work in a range of critical situations.

Network pen tester

Cybersecurity education programs faculty and students

Consultant

SMB Security admin

Network pen testers Network pen tester persona

Network 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.

Read more Cybersecurity faculty and students Cybersecurity education programs faculty and students persona

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.

Read more Consultants Consultant persona

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.

Read more SMB security admins SMB Security Admin persona

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.

Try for free

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.

Select your license

Buy a multi-year license and save.

1 Year - $4,390* 2 Years - $8,560.50 * (Save ) 3 Years - $12,511.50 * (Save ) Add support and training Advanced Support - $400

24x365 Access to phone, email, community, and chat support. More info.

On-Demand Training - $275

1 Year Access to the Nessus Fundamentals On-Demand Video Course for 1 person. More info.

Buy now Renew an existing license Find a reseller

With Advanced Support for Nessus Pro, your teams will have access to phone, Community, and chat support 24 hours a day, 365 days a year. This advanced level of technical support helps to ensure faster response times and resolution to your questions and issues.

Advanced Support Plan Features

Phone Support

Phone support 24 hours a day, 365 days a year, available for up to ten (10) named support contacts.

Chat Support

Chat support available to named support contacts, accessible via the Tenable Community is available 24 hours a day, 365 days a year.

Tenable Community Support Portal

All named support contacts can open support cases within the Tenable Community. Users can also access the Knowledge Base, documentation, license information, technical support numbers, etc.; utilize live chat, ask questions to the Community, and learn about tips and tricks from other Community members.

Initial Response Time

P1-Critical: < 2 hr P2-High: < 4 hr P3-Medium: < 12 hr P4-Informational: < 24 hr

Support Contacts

Support contacts must be reasonably proficient in the use of information technology, the software they have purchased from Tenable, and familiar with the customer resources that are monitored by means of the software. Support contacts must speak English and conduct support requests in English. Support contacts must provide information reasonably requested by Tenable for the purpose of reproducing any Error or otherwise resolving a support request.

Customers rely on Nessus to stay safe

American Eagle Outfitters
Virtustream
World Wide Technology

Learn more

Nessus Professional data sheet

Download the data sheet

Nessus frequently asked questions

Visit the FAQ

Nessus Expert data sheet

Download the data sheet

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Tenable Security Center

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Tenable Nessus

Try for free Buy now

Tenable Vulnerability Management

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.

Your Tenable Vulnerability Management trial also includes Tenable Web App Scanning.

Tenable Vulnerability Management

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.

- 100 assets +

Choose your subscription option:

1 Year$3,500 2 Years$6,825 3 Years$9,975 Buy Now

Please contact us or a Tenable partner.

Thank You

Thank you for your interest in Tenable Vulnerability Management. A representative will be in touch soon.

Try for free Buy now

Tenable Vulnerability Management

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.

Your Tenable Vulnerability Management trial also includes Tenable Web App Scanning.

Tenable Vulnerability Management

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.

- 100 assets +

Choose your subscription option:

1 Year$3,500 2 Years$6,825 3 Years$9,975 Buy Now

Please contact us or a Tenable partner.

Thank you

Thank you for your interest in Tenable.io. A representative will be in touch soon.

Try for free Buy now

Tenable Vulnerability Management

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.

Your Tenable Vulnerability Management trial also includes Tenable Web App Scanning.

Tenable Vulnerability Management

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.

- 100 assets +

Choose your subscription option:

1 Year$3,500 2 Years$6,825 3 Years$9,975 Buy Now

Please contact us or a Tenable partner.

Thank you

Thank you for your interest in Tenable Vulnerability Management. A representative will be in touch soon.

Try for free Buy now

Try Tenable Web App Scanning

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable One Exposure Management 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.

Your Tenable Web App Scanning trial also includes Tenable Vulnerability Management.

Buy Tenable Web App 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.

- 5 FQDNs +

$3,578

Buy Now

Please contact us or a Tenable partner.

Thank you

Thank you for your interest in Tenable Web App Scanning. A representative will be in touch soon.

Request a demo

Tenable Security Center

Identify and prioritize vulnerabilities based on risk to your business. Managed on premises.

Request a demo

Tenable OT Security

Close OT exposure with the unified security solution for converged OT/IT environments.

Request a demo

Tenable Identity Exposure

Close identity exposure with the essential solution for the identity-intelligent enterprise.

Request a demo

Tenable Cloud Security

Close cloud exposure with the actionable cloud security platform.

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Tenable One

The world’s leading AI-powered exposure management platform.

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Tenable AI Exposure

See, secure, and manage how your teams use AI platforms.

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Tenable Attack Surface Management

Gain visibility into your internet-connected assets to eliminate blind spots and unknown sources of risk.

Request a demo

Tenable Enclave Security

Know, expose and close IT and container vulnerabilities.

Thank You

Thank you for your interest in Tenable Enclave Security. A representative will be in touch soon.

Try for free Buy now

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.

Buy Tenable Nessus Professional

Tenable Nessus is the most comprehensive vulnerability scanner on the market today. Tenable 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.

Select your license

Buy a multi-year license and save.

1 Year - $4,390* 2 Years - $8,560.50* (Save ) 3 Years - $12,511.50 * (Save ) Add support and training Advanced Support - $400

24x365 Access to phone, email, community, and chat support. More info.

On-Demand Training - $275

1 Year Access to the Nessus Fundamentals On-Demand Video Course for 1 person. More info.

Buy Now Renew an existing license Find a reseller

*VAT incl.

Try for free Buy now

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.