---
title: "LEANN"
type: "tool"
slug: "startrail-org-leann"
canonical_url: "https://www.graphcanon.com/tools/startrail-org-leann"
github_url: "https://github.com/StarTrail-org/LEANN"
homepage_url: "https://arxiv.org/abs/2506.08276"
stars: 12653
forks: 1138
primary_language: "Python"
license: "MIT"
categories: ["data-retrieval", "vector-databases"]
tags: ["offline-first", "localstorage", "llm", "ai", "gpt-oss", "langchain", "llama-index", "faiss"]
updated_at: "2026-07-07T18:31:39.554743+00:00"
---

# LEANN

> RAG on Everything with LEANN

LEANN is an innovative vector database designed to run efficient, accurate, and private Retrieval-Augmented Generation (RAG) systems locally, achieving up to 97% storage savings and ensuring offline-first functionality.

## Facts

- Repository: https://github.com/StarTrail-org/LEANN
- Homepage: https://arxiv.org/abs/2506.08276
- Stars: 12,653 · Forks: 1,138 · Open issues: 44 · Watchers: 76
- Primary language: Python
- License: MIT
- Last pushed: 2026-07-03T02:43:27+00:00

## Categories

- [Data & Retrieval](/categories/data-retrieval.md)
- [Vector Databases](/categories/vector-databases.md)

## Tags

offline-first, localstorage, llm, ai, gpt-oss, langchain, llama-index, faiss

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- [meilisearch](/tools/meilisearch-meilisearch.md) - A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications. (★ 58,448)

## README (excerpt)

```text
<p align="center">
  <img src="assets/logo-text.png" alt="LEANN Logo" width="400">
</p>

<p align="center">
  <a href="https://trendshift.io/repositories/15049" target="_blank">
    <img src="https://trendshift.io/api/badge/repositories/15049" alt="yichuan-w/LEANN | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/>
  </a>
</p>

<p align="center">
  <img src="https://img.shields.io/badge/Python-3.9%20%7C%203.10%20%7C%203.11%20%7C%203.12%20%7C%203.13-blue.svg" alt="Python Versions">
  <img src="https://github.com/yichuan-w/LEANN/actions/workflows/build-and-publish.yml/badge.svg" alt="CI Status">
  <img src="https://img.shields.io/badge/Platform-Ubuntu%20%26%20Arch%20%26%20WSL%20%7C%20macOS%20(ARM64%2FIntel)%20%7C%20Windows-lightgrey" alt="Platform">
  <img src="https://img.shields.io/badge/License-MIT-green.svg" alt="MIT License">
  <img src="https://img.shields.io/badge/MCP-Native%20Integration-blue" alt="MCP Integration">
  <a href="https://join.slack.com/t/leann-e2u9779/shared_invite/zt-3ol2ww9ic-Eg_kB8omwe6xmYVd0epr4Q">
    <img src="https://img.shields.io/badge/Slack-Join-4A154B?logo=slack&logoColor=white" alt="Join Slack">
  </a>

</p>

<div align="center">
  <a href="https://forms.gle/rDbZf864gMNxhpTq8">
    <img src="https://img.shields.io/badge/📣_Community_Survey-Help_Shape_v0.4-007ec6?style=for-the-badge&logo=google-forms&logoColor=white" alt="Take Survey">
  </a>
  <p>
    We track <b>zero telemetry</b>. This survey is the ONLY way to tell us if you want <br>
    <b>GPU Acceleration</b> or <b>More Integrations</b> next.<br>
    👉 <a href="https://forms.gle/rDbZf864gMNxhpTq8"><b>Click here to cast your vote (2 mins)</b></a>
  </p>
</div>

<div align="center">
  <h3>💬 Join our Slack community!</h3>
  <p>
    We'd love for you to be part of the LEANN community!<br>
    👉 <a href="https://join.slack.com/t/leann-e2u9779/shared_invite/zt-3ol2ww9ic-Eg_kB8omwe6xmYVd0epr4Q"><b>Join LEANN Slack</b></a><br>
    If the invite link has expired or you have trouble joining, please <a href="https://github.com/yichuan-w/LEANN/issues">open an issue</a> and we'll help you get in!
  </p>
</div>

<h2 align="center" tabindex="-1" class="heading-element" dir="auto">
    The smallest vector index in the world. RAG Everything with LEANN!
</h2>

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 →](#️-architecture--how-it-works) | [Paper →](https://arxiv.org/abs/2506.08276)

**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](#-wechat-detective-unlock-your-golden-memories), [iMessage](#-imessage-history-your-personal-conversation-archive)), **[agent memory](#-chatgpt-chat-history-your-personal-ai-conversation-archive)** ([ChatGPT](#-chatgpt-chat-history-your-personal-ai-conversation-archive), [Claude](#-claude-chat-history-your-personal-ai-conversation-archive)), **[live data](#mcp-integration-rag-on-live-data-from-any-platform)** ([Slack](#slack-messages-search-your-team-conversations), [Twitter](#-twitter-bookmarks-your-personal-tweet-library)), **[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 bas
```

---

**Machine-readable endpoints**

- JSON: [`/api/graphcanon/tools/startrail-org-leann`](/api/graphcanon/tools/startrail-org-leann)
- LLM index: [/llms.txt](/llms.txt)
- Full corpus: [/llms-full.txt](/llms-full.txt)

_GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_