Wiki.js is described as 'Write your content in the widely used and simple Markdown format, using the built-in visual editor. Unlike other wiki software that save content in a database with a difficult to extract format, Wiki.js saves all your content directly into Markdown (' and is a popular Wiki Engine in the development category. There are more than 50 alternatives to Wiki.js for a variety of platforms, including Web-based, Self-Hosted, Windows, Linux and Mac apps. The best Wiki.js alternative is TiddlyWiki, which is both free and Open Source. Other great apps like Wiki.js are MediaWiki, BookStack, Nuclino and XWiki.