Obsidian
Local-first Markdown knowledge-base notes with bidirectional links; AI comes via community plugins, so your data stays fully yours.
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Our review
Obsidian is a local-first note-taking knowledge base: notes are plain Markdown files living on your own device, paired with bidirectional links, a graph view and 1,700+ community plugins, making it the knowledge hub for many researchers and writers. The core app is completely free for personal use, with paid add-ons for sync and publishing.
There's no native AI — AI arrives through community plugins (like Obsidian Copilot), usually with your own API key. Unlike Notion AI's built-in, all-in-one assistant, Obsidian suits people who want full ownership of their data and enjoy assembling their own AI workflow.
Pros
Cons
Key features
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FAQ
What is Obsidian?
Local-first Markdown knowledge-base notes with bidirectional links; AI comes via community plugins, so your data stays fully yours.
What are the pros and cons of Obsidian?
Pros: Local-first, data ownership, Bidirectional links & graph, Huge plugin ecosystem, Free core. Cons: No native AI, AI needs your own API key, Learning curve.
How much does Obsidian cost?
Free: Free; Sync: $5/mo; Commercial: $50/user/yr.
Who is Obsidian for?
Best for Knowledge management, Research notes, Linked workflows, Local-first users.
What are the alternatives to Obsidian?
Consider Notion AI, Craft.
Pricing
- • Core app
- • Local files
- • Encrypted cross-device sync
- • Commercial license
- • Org support