Obsidian is a note-taking app that stores notes as local Markdown files on your device, with an optional visual canvas and a linking system for building a personal knowledge base.
It's built around personal notes rather than team documentation: private by default, works offline, and uses backlinks plus a graph view to show how notes connect. Canvas gives you an infinite space to lay ideas out visually instead of in a linear document.
Individuals such as writers, researchers, and students who want to own their notes as plain text files rather than keep them in a team wiki hosted elsewhere.
The core app is free for personal use with unlimited notes. Sync (encrypted, cross-device, with version history) and Publish (hosting notes as a public site) are paid add-ons, and commercial use requires a paid license.
Canvas: An infinite space to visualize and make sense of ideas.