What are some alternatives?
When comparing Acknow and MediaWiki, you can also consider the following products
Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
HelpJuice - Helpjuice is easy-to-use knowledge base software that guarantees. 50% less support emails and happier customers.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Bloomfire - Let Bloomfire help you get organized! Organize your content, build your company knowledge base and help your employees to be more successful.
Nuclino - Nuclino is a unified real-time workspace for teams that brings all your notes, tasks, and docs together in one place.