Sharpen your thinking.
The free and flexible app for your private thoughts. Obsidian stores notes locally, so you own your data for the long term.
Writing is telepathy
From On Writing
Ideas can travel through time and space
Ideas can travel through time and space without being uttered out loud. The process of telepathy requires two places:
- A sending place, a transmission place — where the writer sends ideas.
- A receiving place — where the reader receives the ideas comfortably.
Quote
Japan Trip Planning
To-do
100% Private
Data stored locally
Open Format
Plain text Markdown
User Supported
No investors, no ads
Spark ideas.
From personal notes to journaling, knowledge bases, and project management, Obsidian gives you the tools to come up with ideas and organize them.
Links
Create connections between your notes. Link anything and everything — ideas, people, places, books, and beyond. Invent your own personal Wikipedia.
In [[Meditations on First Philosophy]] the philosopher [[René Descartes]] describes a series of doubts...
arriving at the famous phrase:
- [[I thin|]]
Graph
Visualize the relationships between your notes. Find hidden patterns in your thinking through a visually engaging and interactive graph.
Canvas
An infinite space to research, brainstorm, diagram, and lay out your ideas. Canvas is a limitless playground for your mind. Learn more.
Plugins
Build your ideal thinking space. With thousands of plugins and our open API, it's easy to tailor Obsidian to fit your personal workflow. Learn more.
Community plugins
Calendar by Liam Cain
Calendar view of your daily notes.
Kanban by Matthew Meyers
Markdown-backed kanban boards.
Dataview by Michael Brenan
Advanced queries for the data-obsessed.
Sync securely.
Access your notes on any device, secured with end-to-end encryption. Learn more.
Version history. Easily track changes between revisions, with one year of history.
Collaboration. Work with your team on shared files without compromising data.
Fine-grained control. Decide which files and preferences you want to sync.
Shared vaults
Publish instantly.
Turn your notes into an online wiki, knowledge base, documentation, or digital garden. Learn more.
Seamless editing
Publish your notes instantly from the Obsidian app, and make it easy for readers to explore your web of ideas.
Customization
Control the look and feel of your site with themes, custom domains, password protection, and more.
Optimized for performance
Obsidian Publish sites are fast, mobile-friendly, and optimized for SEO, no configuration required.
Why knowledge workers choose Obsidian
The Advantages
- True data ownership. Files are local Markdown, meaning no vendor lock-in ever.
- Lightning fast performance since it runs locally, even completely offline.
- Over 1,000+ community plugins to perfectly customize your workflow.
- Base app is completely free for personal use without artificial limits.
Considerations
- Steeper learning curve compared to simple note-taking apps like Apple Notes.
- Seamless cloud syncing across devices requires the paid 'Obsidian Sync' add-on (or technical DIY setup).
Free without limits.
No sign-up required. No strings attached.
Optional add-on services make it easy to sync and publish your notes.
Sync
Per user, per month, billed annually
- Sync notes across devices
- End-to-end encryption
- Version history
- Collaborate on shared vaults
- Priority support
Publish
Per site, per month, billed annually
- Publish notes to the web
- No technical knowledge required
- Customizable theme
- Graph and full text search
- Priority support
100% user-supported.
Optional licenses help support the independent development of Obsidian.
Catalyst
One-time payment
- Early access to beta versions
- Community badges
- VIP channel
Commercial
Per user, per year
- Support development
- Become a featured organization
For bulk purchases and other inquiries, contact support@obsidian.md
Loved by the community
"Obsidian has fundamentally changed how I read and write. The ability to link concepts bidirectionally means my notes actually become more valuable the more I add to them."
Michael Chang
Researcher & Writer
"Finally, a tool that respects my privacy. I love that all my files are just plain Markdown sitting on my hard drive. Obsidian is future-proof."
Sarah Jenkins
Software Developer
"The plugin ecosystem is unbelievable. Whether I need a Kanban board, a calendar, or advanced data querying, the community has built an extension for it."
Alex Thorne
Product Manager
Ready to start your second brain?
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