Pricing: Freemium
Verified: Yes
Rating: 4.2/5
Build your second brain with bidirectional linked notes + interactive knowledge graph visualization - 100% free personal use, local-first Markdown privacy.
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Category
Productivity
Verified Selection
Updated Recently
Community Reviewed
Pricing
Free personal use (Commercial: $50/user/year; Sync: $5/mo; Publish: $20/mo)
What is Obsidian?
Obsidian revolutionizes note-taking by automatically linking related ideas across your entire knowledge base. Click any word/phrase to see connected notes, backlinks, and emerging knowledge patterns through stunning interactive graph visualization. Store everything as future-proof plain Markdown files for ultimate portability and control.
Supports 100K+ notes without slowdown across desktop/mobile with 2000+ community plugins for calendars, kanban, flashcards, mindmaps, excalidraw, and more. Perfect for researchers, writers, developers, and PKM enthusiasts who demand local-first privacy, offline access, and infinite extensibility.
Free forever for personal use ($50/user/year commercial license only). Optional Sync ($5/mo) and Publish ($20/mo) services. Scales from daily journal to enterprise knowledge management. See related.
Associated Tags
obsidian free download, knowledge graph notes 2026, bidirectional linked notes, personal knowledge management, markdown second brain free, obsidian plugins 2000+, zettelkasten software free, local first notes app, research knowledge base, best pkm app 2026
Key Features
Automatic bidirectional linking
Interactive knowledge graph view
Local Markdown files (future-proof)
2000+ community plugins/themes
100K+ notes performance
Mobile + desktop sync
Local-first privacy focused
Daily notes + graph analysis
Editor's Verdict
Official ReviewSEO-focused AI writer with decent optimization features
4.2 / 5.0
Editor RatingReviewed by Sohail Akhtar
Lead Editor & Founder
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Frequently Asked Questions
Is Obsidian really free for personal use?
100% free forever for personal use. Only commercial/business use requires $50/user/year license.
Where are Obsidian files actually stored?
Local plain Markdown (.md) files in any folder. Dropbox/iCloud/Git portable across ALL apps/editors.
How many notes can Obsidian actually handle?
100K+ notes scales perfectly across desktop/mobile. Graph visualization handles massive knowledge bases.
Obsidian vs Notion/Roam - key differences?
Obsidian = local files + free + infinite plugins. Notion = cloud SaaS. Roam = expensive cloud-only.