We are using .NET Stack for our web app scanner. Both for desktop and (https://www.netsparker.com/web-vulnerability-scanner/) and SaaS versions use .NET (https://www.netsparker.com/online-web-application-security-s...)

We started with Bizspark as well, now we graduated and license cost is not much really. We also rely on MS stack for many things other than source code repository / CI etc.