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The free and flexible app for your private thoughts and knowledge.

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Released 2020
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About Obsidian

Obsidian is a versatile knowledge management application designed to help users organize their thoughts, notes, and ideas effectively. It addresses the challenge of information overload by providing a flexible framework for creating interconnected notes, fostering deeper understanding and enabling the discovery of hidden patterns within one's knowledge. The platform utilizes plain text Markdown files stored locally on the user's device, ensuring data ownership and long-term accessibility. Key features include bidirectional linking to create a web of interconnected ideas, a dynamic graph view to visualize relationships, and an infinite Canvas for brainstorming and diagramming. Obsidian is highly extensible, offering thousands of community plugins and an open API to tailor the app to individual workflows. Optional add-on services like Obsidian Sync provide end-to-end encrypted synchronization across devices, and Obsidian Publish allows users to turn their notes into public knowledge bases. Obsidian is ideal for individuals and teams seeking a powerful, privacy-centric tool for personal knowledge management, journaling, project planning, research, and collaborative documentation. Its adaptability makes it suitable for students, writers, developers, and anyone who needs to capture, connect, and cultivate their ideas in a structured yet flexible environment, forming a robust foundation that can be integrated with AI-powered workflows for enhanced analysis or content generation.

Key Features

  • Local Markdown file storage for data ownership
  • Bidirectional linking between notes
  • Interactive graph view to visualize connections
  • Infinite Canvas for brainstorming and diagramming
  • Extensive plugin ecosystem and open API for customization
  • End-to-end encrypted synchronization (paid add-on)
  • Publish notes as an online knowledge base (paid add-on)
  • Offline access to all notes

Pros

  • Strong emphasis on user privacy and data ownership
  • Highly customizable with a vast array of plugins and themes
  • Uses open, future-proof file formats (Markdown)
  • Powerful linking and graph features for knowledge discovery
  • Active and supportive community for resources and help
  • Free for personal use without feature limitations

Cons

  • No native AI features for content generation or automated analysis
  • Paid subscriptions required for core add-on services like Sync and Publish
  • Steep learning curve for new users, especially for advanced customization
  • Requires manual effort to build and maintain a knowledge base; not automated
  • No built-in web clipper, relying on external tools or plugins

Pricing

Free for personal use. Optional add-ons: Sync: $4 USD per user, per month, billed annually. Publish: $8 USD per site, per month, billed annually. Catalyst License: $25 USD one-time payment for early beta access and community badges. Commercial License: $50 USD per user, per year.

Frequently Asked Questions

Obsidian is not required to be paid for commercial use, but organizations are encouraged to purchase a commercial license to support its independent development.

Obsidian offers full refunds within 7 days of purchase for Obsidian Sync and Publish. Catalyst licenses, Commercial licenses, and Obsidian Credit are non-refundable.

Obsidian stores notes locally on your device, ensuring privacy and offline access. If using Obsidian Sync, data is secured with AES-256 end-to-end encryption, and no telemetry data is collected.

Yes, students, faculty members, and nonprofit employees are eligible for a 40% discount on Obsidian Sync and Publish.

A Catalyst license grants early access to beta versions of Obsidian, special community badges, and directly supports the independent development of the application.

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