What is Obsidian?

Obsidian is a local-first, Markdown-based knowledge management app. Unlike cloud-only note apps, Obsidian stores everything as plain Markdown files on your computer. You own your data completely. The real power comes from linking notes together and the massive plugin ecosystem.

Key Features

Bidirectional Linking

Link notes to each other with [[wiki-links]]. When you link Note A to Note B, Note B automatically knows about Note A. This creates a web of connected knowledge that grows more valuable over time.

Graph View

Visualize your knowledge as an interactive graph. See how your notes connect, discover clusters of related ideas, and find gaps in your thinking. The graph view is both beautiful and genuinely useful.

1,500+ Community Plugins

Obsidian’s plugin ecosystem is unmatched. Dataview turns your notes into a queryable database. Kanban adds project boards. Excalidraw adds whiteboarding. Templater adds powerful templates. There’s a plugin for everything.

Local-First Privacy

Your notes are plain Markdown files on your disk. No cloud, no servers, no vendor lock-in. If Obsidian disappears tomorrow, your notes are still there, readable by any text editor.

Pricing

Obsidian is free for personal use. Sync (end-to-end encrypted cross-device sync) is $4/month. Publish (turn notes into a website) is $8/month. Commercial use requires a $50/year license.

Who Should Use Obsidian?

• Knowledge workers building a personal knowledge base
• Developers who want Markdown-native note-taking
• Researchers and writers connecting ideas across sources
• Anyone who wants to own their data completely

The Bottom Line

Obsidian is the best tool for building a personal knowledge base. It’s fast, private, extensible, and future-proof. The linking system transforms how you think about notes — from isolated documents to a connected web of knowledge. If you’re serious about knowledge management, Obsidian is the default choice.