Nessus is the de-facto industry standard vulnerability assessment solution for security practitioners.
Nessus helps the security pros on the front lines quickly and easily identify and fix vulnerabilities - including software flaws, missing patches, malware, and misconfigurations - across a variety of operating systems, devices and applications.
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. 20 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 more than 27,000 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.
Nessus has the industry's lowest false positive rate with six-sigma accuracy.
Nessus has the deepest and broadest vulnerability coverage in the industry.
released weekly
Nessus is trusted by more than 27,000 organizations, with 2 million downloads worldwide.
Nessus is the #1 deployed solution for application vulnerability assessment*
Don't just take our word for it. See for yourself why security practitioners around the world put their trust in Nessus.
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It allows us to find and remediate vulnerability.
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It finds vulnerabilities.
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Makes life easier, every day.
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It makes my job easy!
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It just works every time.
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It makes scanning for vulnerabilities extremely easy!
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It will save us a ton of time and money!
Take the Guesswork out of Vulnerability Assessment
Get the Power of Tenable Research Behind You
Our research team works closely with the security community to discover new vulnerabilities and provide insights into published vulnerabilities to help organizations quickly detect them in their environment. Our research team builds these insights into Nessus to help you become a vulnerability assessment expert (without actually having to be one).
More than 100 zero-day vulnerabilities discovered over the past 3 years
New plugins released within 24 hours of vulnerability disclosure (on average)
Plugins are automatically updated in Nessus in real-time, providing you with timely information on the latest vulnerabilities and malware, a simple set of remediation actions, and a fast and easy way to see if your systems are vulnerable. This means more comprehensive assessments and less time required to research, validate and prioritize issues.
Built For Practitioners, By Practitioners
Nessus was 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.
More than 27,000 organizations trust Nessus.
“It just works.”-Nessus User
Get Started with Nessus Professional
Get the world’s most widely deployed vulnerability assessment solution.