What are some alternatives?
When comparing Helpie Knowledge Base Wiki Plugin and VuePress, you can also consider the following products
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Jekyll - Jekyll is a simple, blog aware, static site generator.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
Hugo - Hugo is a general-purpose website framework for generating static web pages.
AMuseWiki - Amusewiki is more than just a wiki engine, it’s also a powerful authoring, archiving and publishing platform.
Grav - The modern open source flat-file CMS