Obsidian is described as 'Note-taking app that lets you create a personal knowledge graph with ease. It is designed for non-linear thinking and allows you to easily link your notes together wiki-style' and is a leading Note-taking tool in the office & productivity category. There are more than 100 alternatives to Obsidian for a variety of platforms, including Mac, Windows, Web-based, Linux and Android apps. The best Obsidian alternative is Logseq, which is both free and Open Source. Other great apps like Obsidian are Zettlr, Joplin, sNotes – Students Notes and Anytype.