Nessus is a vulnerability scanning product and vulnerability management product that has both free 'Home' and paid 'Commercial' editions

Nessus is a proprietary vulnerability scanner which is developed by Tenable Network Security. It is free of charge for personal use in a non-enterprise environment.

It has a web interface for conducting scans and provision to generate & download scan reports.

Source - https://en.wikipedia.org/wiki/Nessus_(software)