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 free for 7 days
Unlimited vulnerability assessments you can use anywhere
Know your vulnerabilities
Automate point-in-time assessments to identify software flaws, missing patches, malware and misconfigurations across a variety of operating systems, devices and applications.
Expose the threats that matter
Nessus provides a variety of vulnerability scoring systems like CVSS v4, EPSS and Tenable’s VPR to help you implement effective vulnerability prioritization for remediation efforts.
Close knowledge gaps
Get actionable tips and tricks on the next steps to take with a resource center that can guide experienced and non-security staff.
The global gold standard in vulnerability assessment
- 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
- Cloud infrastructure scans
Try Buy
- 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
- Cloud infrastructure scans
Try Buy
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
Try now#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.
Learn more#1
in hearts and minds
Don't just take our word for it. Security practitioners around the world put their trust in Nessus.
See moreNessus 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.
89K+
CVEs
218,000+
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.
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.
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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
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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.
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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.
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Pre-built policies and templates
With more than 450 pre-configured templates, Nessus helps you quickly understand where you have vulnerabilities.
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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.
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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.
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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.
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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
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 testers
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 moreCybersecurity faculty and students
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 moreConsultants
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 moreSMB security admins
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.
Read moreTo 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 Expert—
Built for security professionals like you
Get the world’s most widely deployed vulnerability assessment solution.
Buy Nessus Expert
Try Nessus Expert
Try Nessus free for 7 days
Try now
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
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Identify and prioritize vulnerabilities based on risk to your business. Managed on premises.
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 and Tenable Lumin.
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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
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Visualize and explore your exposure management, track risk reduction over time and benchmark against your peers with Tenable Lumin.
Your Tenable Lumin trial also includes Tenable Vulnerability Management and Tenable Web App Scanning.
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Tenable Nessus is the most comprehensive vulnerability scanner on the market today.
NEW - Tenable Nessus Expert
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Nessus Expert adds even more features, including external attack surface scanning, and the ability to add domains and scan cloud infrastructure. Click here to Try Nessus Expert.
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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.
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Free for 7 days.
Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.
Already have Tenable Nessus Professional? Upgrade to Nessus Expert free for 7 days.
Buy Tenable Nessus Expert
Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.
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