LEANN
[MLsys2026]: RAG on Everything with LEANN. Enjoy 97% storage savings while running a fast, accurate,
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The smallest vector index in the world. RAG Everything with LEANN!
LEANN is an innovative vector database that democratizes personal AI. Transform your laptop into a powerful RAG system that can index and search through millions of documents while using 97% less storage than traditional solutions without accuracy loss.
LEANN achieves this through graph-based selective recomputation with high-degree preserving pruning, computing embeddings on-demand instead of storing them all. Illustration Fig → | Paper →
Ready to RAG Everything? Transform your laptop into a personal AI assistant that can semantic search your [file system](#-personal-data-manager-process-any-documents-pdf-txt-md), [emails](#-your-personal-email-secretary-rag-on-apple-mail), [browser history](#-time-machine-for-the-web-rag-your-entire-browser-history), [chat history](#-wechat-detective-unlock-your-golden-memories) (WeChat, iMessage), [agent memory](#-chatgpt-chat-history-your-personal-ai-conversation-archive) (ChatGPT, Claude), [live data](#mcp-integration-rag-on-live-data-from-any-platform) (Slack, Twitter), [codebase](#-claude-code-integration-transform-your-development-workflow)\* , or external knowledge bases (i.e., 60M documents) - all on your laptop, with zero cloud costs and complete privacy.
\ Claude Code only supports basic `grep`-style keyword search. LEANN is a drop-in semantic search MCP service fully compatible with Claude Code*, unlocking intelligent retrieval without changing your workflow. 🔥 Check out the easy setup →
Why LEANN?
The numbers speak for themselves: Index 60 million text chunks in just 6GB instead of 201GB. From emails to browser history, everything fits on your laptop. See detailed benchmarks for different applications below ↓
🔒 Privacy: Your data never leaves your laptop. No OpenAI, no cloud, no "terms of service".
🪶 Lightweight: Graph-based recomputation eliminates heavy embedding storage, while smart graph pruning and CSR format minimize graph storage overhead. Always less storage, less memory usage!
Don't lose this
Three weeks from now, you'll want LEANN again. Will you remember where to find it?
Save it to your library and the next time you need LEANN, it’s one tap away — from any AI app you use. Group it into a bench with the rest of the team for that kind of task and you can pull the whole stack at once.
⚡ Pro tip for geeks: add a-gnt 🤵🏻♂️ as a custom connector in Claude or a custom GPT in ChatGPT — one click and your library is right there in the chat. Or, if you’re in an editor, install the a-gnt MCP server and say “use my [bench name]” in Claude Code, Cursor, VS Code, or Windsurf.
a-gnt's Take
Our honest review
[MLsys2026]: RAG on Everything with LEANN. Enjoy 97% storage savings while running a fast, accurate,. Best for anyone looking to make their AI assistant more capable in data & databases. It's completely free and works across most major AI apps. This one just landed in the catalog — worth trying while it's fresh.
Tips for getting started
Tap "Get" above, pick your AI app, and follow the steps. Most installs take under 30 seconds.
Heads up: this needs an API key to work. You'll get one from the service's website (usually free). The setup guide tells you exactly where.
Your data stays between you and your AI — nothing is shared with us or anyone else.
What's New
Imported from GitHub
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