What Is Obsidian?
Obsidian is a desktop and mobile note-taking app built around plain text Markdown files. Unlike cloud-based tools like Notion or Evernote, Obsidian stores everything locally on your device — you own your data completely. Notes are linked together using wiki-style links, and a built-in graph view visualizes the connections between your notes.
It's free for personal use, with optional paid add-ons for sync and publishing. It runs on Windows, macOS, Linux, iOS, and Android.
What Makes Obsidian Different
Most note apps store your content in a proprietary format locked to their platform. Obsidian takes the opposite approach: your notes are plain .md files in a folder on your computer. You can open them with any text editor, back them up however you like, and never worry about a company shutting down and taking your notes with it.
The linking system is where Obsidian really shines. Type [[note name]] and you create a bidirectional link between two notes. Over time, this builds a personal knowledge base where ideas connect and reinforce each other — often called a "second brain."
Key Features
- Local-first storage — full control, works offline, no subscription required
- Bidirectional links — connect notes and see what links back to any given note
- Graph view — visual map of your entire knowledge base
- Plugin ecosystem — hundreds of community plugins for calendars, tasks, spaced repetition, and more
- Themes and custom CSS — highly customizable appearance
- Canvas — a built-in whiteboard for visual note organization
Who Is Obsidian Best For?
Obsidian works best for people who:
- Take a lot of notes and want them to be searchable and connected over time
- Write long-form content, research, or essays and want to build up a reference library
- Care about data ownership and don't want to be locked into a cloud service
- Are comfortable with Markdown or willing to learn the basics
It's not the best fit for complete beginners who want a simple, drag-and-drop experience, or for teams that need real-time collaboration (Notion is better for that).
Potential Drawbacks
Learning curve: Obsidian is powerful but not immediately intuitive. It takes time to build a system that works for you, and the plugin ecosystem can become overwhelming.
Sync costs money: The built-in Obsidian Sync service is a paid add-on. Free alternatives exist (iCloud, Dropbox, GitHub) but require some setup.
Collaboration is limited: Obsidian is fundamentally a solo tool. Real-time multi-user editing isn't supported.
Pricing
| Plan | Cost | What's Included |
|---|---|---|
| Personal (free) | $0 | Full app, all core features, local storage |
| Obsidian Sync | ~$4/month | End-to-end encrypted sync across devices |
| Obsidian Publish | ~$8/month | Publish your notes as a public website |
| Commercial license | ~$50/year | Required for business use |
Verdict
Obsidian is one of the most capable note-taking apps available, and the free personal version is genuinely excellent. If you value data ownership, love building connected knowledge systems, and don't mind investing some time in setup, it's hard to beat. If you want something you can pick up in five minutes with no configuration, look elsewhere — but you'd be missing out on something special.