Obsidian

Obsidian is a local-first note-taking and personal-knowledge-management app that stores everything as plain Markdown files on your own device. It is beloved by privacy-conscious power users for its linked notes, graph view, Canvas, the Bases database feature, and a vast community-plugin ecosystem - including plugins that bring local and cloud AI into your vault. The core app is completely free with no feature gating; optional paid add-ons handle end-to-end encrypted cross-device Sync and web Publish. In 2026 Obsidian crossed 1.5 million users and remains the go-to second brain for people who want full ownership of their data and an endlessly customizable system.

Key features

• Local-first plain-Markdown storage you fully own
• Bidirectional links and interactive graph view
• Canvas and Bases (database) views
• Huge community-plugin ecosystem, including AI plugins
• End-to-end encrypted Sync add-on
• Web publishing via Publish add-on

Pros & cons

Obsidian pricing

Obsidian uses a freemium pricing model, with paid plans from Free (full app); Sync $4/mo (annual); Publish $8/mo (annual); Commercial license $50/user/yr. A free tier lets you test it before committing.

Who should use Obsidian?

Obsidian is best suited for Privacy-focused power users who want a customizable, locally owned second brain. It earns its place for completely free core app with no feature gating — though it's worth weighing the trade-off that aI is not built in - relies on plugins to add it.

Comparing options? See our best ai productivity & meetings tools guide, or browse every ai productivity & meetings tool tracked on Benchquill.

Obsidian FAQ

Is Obsidian free?

Obsidian is freemium. Pricing starts at Free (full app); Sync $4/mo (annual); Publish $8/mo (annual); Commercial license $50/user/yr.

What is Obsidian best for?

Obsidian is best for Privacy-focused power users who want a customizable, locally owned second brain.