There's just too many features in https://servicestack.net to be able to cover cohesively in a single comment. If you're interested, I'd start with the Projects Home Page https://github.com/ServiceStack/ServiceStack which tries its best to summarize its features in a short description as best it can (with links to further details).
Essentially ServiceStack is built with a completely different messaging methodology and simplicity-focused mindset, a lot the benefits of its approach is covered from the docs links on the wiki: https://github.com/ServiceStack/ServiceStack/wiki#documentat...
Or if you prefer to see what ServiceStack looks like in code instead, checkout the small, focused and documented examples listed at:
Essentially ServiceStack is built with a completely different messaging methodology and simplicity-focused mindset, a lot the benefits of its approach is covered from the docs links on the wiki: https://github.com/ServiceStack/ServiceStack/wiki#documentat...
Or if you prefer to see what ServiceStack looks like in code instead, checkout the small, focused and documented examples listed at:
https://github.com/ServiceStackApps/LiveDemos
Disclaimer: I work full-time on ServiceStack.