Although we offer a SaaS Helpdesk Solution we also have a downloadable Helpdesk package that lets you install it on your own Windows server. Here's a couple of reasons why you might prefer the downloadable "on-premise" version of our help desk app:
Downloadable solution is more expensive but offers unlimited flexibility in case you need it. You can also download the free Helpdesk trial, which is not time limited but has a couple of features disabled. If you want to test all the features, even the ones that are disabled - simply sign-up for the hosted-version trial and test everything.
We also offer help desk source codes if you really want unlimited customization and have a team of developers. It's an ASP.NET MVC app in C#. Please note that we do not offer any custom development services