Tenable Network Security
Nessus Cloud
Tenable Network Security’s Nessus Cloud is a SaaS-based vulnerability management solution for teams, businesses and organizations. Nessus Cloud combines the powerful detection, scanning and auditing features of Nessus with multi-user support enabling extensive collaborative capabilities of scanners and resources. In addition, Nessus Cloud is Tenable’s Approved Scanning Vendor (ASV) solution for quarterly external scan validation for the PCI DSS.
http://www.tenable.com/products/nessus/nessus-cloud