What is Obsidian?
Obsidian is a knowledge management application that stores all of your notes as plain text Markdown files on your local device. It is designed for users who need to build and navigate complex webs of information over time.
Unlike cloud-based tools like Notion or Evernote, Obsidian does not lock your data into a proprietary format or require a server connection to function. Your notes remain accessible with any text editor, even if the application stops working.
The core differentiator of Obsidian is its focus on linking ideas. You can create bidirectional connections between notes using simple wiki-style link syntax. These links form a directed graph of your knowledge, which you can visualize in an interactive graph view.
This structure makes Obsidian especially useful for researchers, writers, project managers, and students who need to synthesize information from many sources. It is less suited for quick, ephemeral note-taking or for users who prefer a rigid folder hierarchy.
Obsidian is built on an extensible platform called the "core plugin" system. The application itself provides a minimal but powerful set of features out of the box. A large community of developers has created over 1,500 community plugins, themes, and custom CSS snippets.
These extensions can add features like Kanban boards, daily notes, calendar views, and even integration with external tools like Todoist or Zotero. This flexibility allows Obsidian to adapt to many different workflows, from simple note-taking to full project management.
Obsidian is a powerful, local-first knowledge management tool that keeps your data portable and under your control, with a generous free tier.
Obsidian key features
Local-first Markdown storage
Every note is a plain text file with a .md extension. Your data is portable, future-proof, and indexable by any file search tool. You can use any text editor to read or edit your notes, and you can sync them across devices using services like Dropbox, iCloud, or Syncthing.
Bidirectional linking and graph view
You create links between notes with double brackets (e.g., [[Project X]]). Obsidian automatically creates a backlink on the target note, showing you all incoming connections. The graph view displays these relationships as an interactive network, allowing you to see clusters of related ideas and identify gaps in your knowledge.
Core plugin system
Obsidian ships with over 20 core plugins, including a file explorer, search, tags, outline, backlinks pane, and a daily notes feature. These plugins are toggleable, so you can enable only what you need. This reduces visual clutter and keeps the interface clean.
Community plugins and themes
The community plugin store offers over 1,500 extensions. Notable examples include the "Dataview" plugin for querying and displaying note metadata, the "Kanban" plugin for task management, and the "Excalidraw" plugin for hand-drawn diagrams. Themes can change the entire visual style of the application.
Obsidian Sync and Obsidian Publish
Obsidian offers paid cloud services for syncing and publishing. Sync is an end-to-end encrypted service that synchronizes your vault across devices. Publish lets you turn a selection of notes into a static website with a custom domain, useful for sharing documentation or a public second brain.
Obsidian pricing
Obsidian is free for personal use. The free tier includes all features: unlimited notes, all core plugins, community plugins, and themes. There are no limitations on the number of files, storage size, or the graph view.
This is a generous offering compared to competitors like Notion, which limits blocks on the free plan, or Roam Research, which charges a monthly fee for basic access. Paid plans are optional and focus on cloud services.
| Plan | Price | Details |
|---|---|---|
| Free | $0 | All features, unlimited notes, all plugins |
| Obsidian Sync | $5/month (yearly) or $10/month (monthly) | Encrypted syncing with version history |
| Obsidian Publish | $10/month (yearly) or $20/month (monthly) | Host a public website from your notes |
| Commercial License | $50 per user per year | For business use |
For most individual users, the free tier is sufficient. The paid services are competitive with alternatives like iCloud ($0.99 per month for 50 GB) or Dropbox ($11.99 per month for 2 TB), but Obsidian Sync offers tighter integration with the application. For teams, the commercial license is affordable compared to Notion's team plan ($10 per user per month).
What we like
- Data ownership and portability. Your notes are plain text files on your hard drive. You can leave Obsidian at any time without losing access to your content. This is a major advantage over proprietary tools.
- Exceptional linking and visualization. The bidirectional linking and graph view are not gimmicks. They genuinely help with discovering connections between ideas and organizing complex projects.
- Highly extensible via community plugins. The plugin ecosystem is vast and active, covering nearly every workflow imaginable, from task management to spaced repetition.
- Performance with large vaults. Vaults containing over 10,000 notes remain responsive in search, linking, and graph rendering, with no noticeable lag.
- Clean, distraction-free interface. The default theme is minimal. You can toggle off all interface elements except the editor, which helps with focused writing.
What could be better
- Steep learning curve for new users. The flexibility of Obsidian can be overwhelming. New users often struggle to decide between folders, tags, and links. The official documentation is dense and not always beginner-friendly.
- Limited mobile experience. The mobile app works for reading and quick edits, but it lacks the full plugin support and smoothness of desktop. Typing on a phone is awkward, and the graph view is not optimized for small screens.
- No built-in real-time collaboration. Unlike Google Docs or Notion, Obsidian does not support simultaneous editing by multiple users. For team projects, you must rely on external sync solutions and manual conflict resolution.
- Plugin quality varies. While the community is active, not all plugins are well-maintained or documented. Some plugins break after updates, and you may need to troubleshoot compatibility issues.
Our verdict
Obsidian is a powerful tool for anyone who needs to manage a large, interconnected body of knowledge over a long period. Its local-first, plain-text foundation ensures your data remains accessible and under your control. The linking and graph features are genuinely useful for research, writing, and project planning.
The plugin ecosystem extends the application far beyond simple note-taking, making it adaptable to many workflows. Obsidian is recommended for researchers, students, writers, and knowledge workers who are comfortable with a modest learning curve.
It is also an excellent choice for users who value data privacy and want to avoid vendor lock-in. The free tier is generous enough for most individual use cases, and the paid services are reasonably priced for what they offer.
Obsidian is not for those who want a simple, out-of-the-box app or need real-time collaboration. For knowledge workers willing to learn, it is a durable and flexible thinking environment.
Obsidian is not recommended for users who want a simple, out-of-the-box note-taking app with minimal setup. It is also not ideal for teams that need real-time collaboration, as that feature is absent. For quick, disposable notes or for users who prefer a rigid folder structure, simpler tools like Apple Notes or Google Keep may be a better fit.
However, for those willing to invest time in learning the system, Obsidian provides a durable and flexible thinking environment that grows with you.
