Obsidian stores all notes as plain markdown files on your device — no cloud lock-in. Bidirectional linking builds a graph of connected knowledge over time. 1,500+ community plugins make it infinitely extensible.
Pros
- Your files -- full ownership | Bidirectional links and knowledge graph | 1,500+ community plugins | Offline-first | Extremely fast | Free locally
Cons
- Sync costs extra | Steeper learning curve than Notion | No real collaboration | Mobile app less polished | No built-in task management
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