Scanners searching for vulnerabilities do important work, and provide actionable information to InfoSec administrators. Sensilla improves on the data provided by scanners in two important ways:
The first is continuous vs. iterative operation. Scanners only find vulnerabilities when actively scanning, whereas Sensilla is continuously monitoring for vulnerability information and allowing organizations to have a perpetually current view of the state of the system.
The second important difference between scanners and Sensilla is that Sensilla provides visibility into what has happened instead of just what could happen as is the case with scanners. Scanning systems provide visibility into what vulnerable software exists in the network and what exploits it is susceptible to whereas Sensilla provides visibility into what is actually happening and/or has happened on the network in addition to the software and its vulnerabilities. The difference between knowing that you have a vulnerable FTP server running on a host and a record of every other host that has used that FTP server is stark and is a marked improvement in understanding the relevance of vulnerability findings.
Another advantage to Vulnerability Monitoring as compared to scanning is that a Vulnerability/Risk report is always available. There is no need to hire a third party, schedule the scans, wait for the report, etc. With Sensilla, you simply view the current data and produce a report.