What are some alternatives?
TiddlyWiki - TiddlyWiki — a non-linear personal web notebook
Confluence - Confluence is content collaboration software that changes how modern teams work
Jama Connect - Collaborate with your team and share the data you care about in one place
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.