This is only great open source alternative for HelpScout. Using this for events and collaboration between teams for small projects. Indeed its very good option compared to paid services if you want to keep an archive of your data forever and prevent data access by service provider.
What People Say About FreeScout
You guys are creating a really nice platform and its code is very well written… I really do like the whole thing. In fact being that I have used many ticket systems this one is seriously the most clean and easy to use as well as very versatile and fast with minimal upkeep and requirements.