I think this is one of the best knowledge base of recent times than the others which are too costly.
It's an awesome to create a knowledge base for your business website especially good for product documentation. We also use it as an internal wiki for knowledge sharing and collaboration within our company.
[Edited by JustinKumar, September 24]
Our users have written 2 comments and reviews about Helpie Knowledge Base Wiki Plugin, and it has gotten 5 likes