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AI Tool Profile
Obsidian
Obsidian is a free note-taking app that stores Markdown notes on your own device, with links, a graph view, canvas and community plugins. Optional Sync costs $5 per user per month billed monthly.
Description of Obsidian
Obsidian is a note-taking and knowledge-base app that keeps your notes as plain Markdown files on your own device. Because the files use an open format, you can open them in other tools and keep them for the long term, and the app works offline. Notes can link to each other, and a graph view shows those connections. Canvas gives an open space for laying out notes, images and ideas, and a web clipper saves pages into your vault. Thousands of community plugins and themes, plus an open API, let you add features such as calendars, kanban boards, task tracking and database-style queries.
The app itself is free without limits, needs no sign-up and, according to the pricing FAQ, collects no telemetry. Two paid services are optional. Sync keeps notes in step across devices with end-to-end encryption, version history and shared vaults, and costs $5 per user per month billed monthly. Publish turns notes into a website and costs $10 per site per month billed monthly. Both are cheaper on yearly billing, and students, faculty and nonprofit staff get 40 percent off. A Commercial license at $50 per user per year is encouraged for organizations but not required, and a one-time Catalyst license gives early access to beta versions.
Obsidian has no built-in AI assistant in the pages reviewed. AI features come from third-party community plugins, so their quality, cost and privacy depend on the plugin and the model provider you connect. Apps are offered for Windows, Mac, Linux, iOS and Android.
Features of Obsidian
- Stores notes as local Markdown files with backlinks, a graph view and Canvas, and works offline without an account.
- Community plugins and themes, plus an open API, extend the app; AI features come from third-party plugins rather than the core app.
- Optional Sync adds end-to-end encrypted syncing and version history; optional Publish puts selected notes on a website.
Frequently asked questions
Is Obsidian free?
Yes. The app is free without limits and needs no sign-up, including for work use. Sync ($5 per user per month billed monthly) and Publish ($10 per site per month billed monthly) are optional paid add-ons.
Does Obsidian have built-in AI?
Not in the pages reviewed. AI features come from community plugins, which connect to a model provider of your choice, so check each plugin's data handling before using it with private notes.
Website: https://obsidian.md/
Company: Obsidian
Key facts
Local-first Markdown notes with links, graph view and a large plugin library. The app is free; AI only via third-party plugins. Optional Sync is $5 per user per month billed monthly.
| Pricing model | Freemium |
|---|---|
| Free tier | Yes · Full app free without limits, no sign-up; Sync and Publish are paid add-ons · no credit card required |
| Starting price | $5 / month |
| Data residency | On-premises — Pricing FAQ says notes are stored locally on your device and the apps collect no telemetry; Sync uses AES-256 end-to-end encryption. |
| Compliance (as stated by vendor) | Not verified |
| Integrations | Not verified |
| Public API | Yes |
| Self-hostable | Not verified |
| Official site | Not verified |
| Can a general AI assistant replace it? | Obsidian is a notes store, not an AI. Pair it with a chatbot or an AI plugin if you want summaries or Q&A over your vault; check what the plugin sends to its provider. |
| Last verified | 2026-10-12 by editor |
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Update history
- 2026-10-12 · ai alternative note updated (editor)
- 2026-10-12 · editor verdict updated (editor)
- 2026-10-12 · api available updated (editor)
- 2026-10-12 · data residency note updated (editor)
- 2026-10-12 · data residency updated (editor)
- 2026-10-12 · pricing page url updated (editor)
- 2026-10-12 · starting price usd updated (editor)
- 2026-10-12 · free tier updated (editor)
- 2026-10-12 · pricing model updated (editor)
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