Nessus is the world's most popular vulnerability scanner used in over 75,000
organizations world-wide. Many of the world's largest organizations are
realizing significant cost savings by using Nessus to audit business-critical
enterprise devices and applications.
The "Nessus" Project was started by Renaud Deraison in 1998 to provide to the
internet community a free, powerful, up-to-date and easy to use remote
security scanner. Nessus is currently rated among the top products of its type
throughout the security industry and is endorsed by professional information
security organizations such as the SANS Institute.