Khoj

The most mature open-source second-brain AI with native Obsidian integration, semantic search across your notes, and deep research capabilities. Best for knowledge workers who want an AI that truly understands their personal knowledge base.

AI ToolFree Tier: OSS; Docker/Python + Obsidian pluginCompany: Khoj AICategory: Automation & AgentsOpen Source: YesQuick Start: Install Khoj via Docker or pip → Connect your Obsidian vault or file directories → Chat with your knowledge base through the web UI or Obsidian plugin

Khoj

Most mature open second-brain AI — native Obsidian integration, semantic search, deep research

Visit Khoj →

The most mature open-source second-brain AI with native Obsidian integration, semantic search across your notes, and deep research capabilities. Best for knowledge workers who want an AI that truly understands their personal knowledge base.

FREE TIER
OSS; Docker/Python + Obsidian plugin
COMPANY
Khoj AI
CATEGORY
Automation & Agents › Agent Frameworks
OPEN SOURCE
Yes
PRIVACY
Self-hosted daemon; local-first
TAGS
second-brainobsidianrag

QUICK START

Install Khoj via Docker or pip → Connect your Obsidian vault or file directories → Chat with your knowledge base through the web UI or Obsidian plugin

BEST FOR

  • ▸Knowledge workers deeply invested in Obsidian for their personal knowledge base.
  • ▸Users needing local-first AI for sensitive data, ensuring full data ownership.
  • ▸Tech-savvy users comfortable with self-hosting Docker/Python for custom AI control.

NOT FOR

  • ✕Beginners seeking a simple, cloud-hosted, zero-setup AI tool.
  • ✕Users who don't use Obsidian or want a cloud-based note-taking integration.
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