Sandstorm and WikiSuite have some similarities. This page is to explain the differences and rationale of choices. You likely will be interested in the other alternatives to WikiSuite.
- Both are FLOSS self-hosting platforms
Sandstorm is more about helping self-host a selection of high quality apps (with more than one option for the same use case) while WikiSuite is about offering you an integrated solution (which you can self-host)