Obsidian — Personal Knowledge Base
Obsidian is the note-taking app for serious thinkers. Every note can link to any other note using [[wiki-style links]], creating a web of connected knowledge that mirrors how your brain actually works. The graph view visualizes these connections beautifully. Your notes are plain Markdown files stored locally on your device — you own your data forever, no lock-in, no cloud dependency. The plugin ecosystem is massive: Kanban boards, calendars, mind maps, Dataview queries, and hundreds more. The core app is completely free. Sync ($4/month) and Publish ($8/month) are optional paid features. The learning curve is moderate but rewarding. For researchers, writers, students, and lifelong learners who want to build a lasting knowledge system, Obsidian is unmatched.
Why we picked this
A local-first note-taking app with bidirectional links — build your second brain.
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