Build your own retrieval system.
Retrieval is where AI answers come from. Own the retrieval and you own the provenance.
The ranking rule
Repositories matching this query, sorted by stars:
topic:rag stars:>200 pushed:>2025-10-29 archived:falseSynced nightly; star history kept so momentum is measured, not guessed.
30 projects
live from source · api.github.com · Oct 29, 12:55 AM UTCopen-webui
User-friendly AI Interface (Supports Ollama, OpenAI API, ...)
langchain
The agent engineering platform.
awesome-llm-apps
100+ AI Agents, Agent Skills and RAG Apps - Free and Open Source.
graphify
Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local deterministic AST parsing, every edge explained, no vector store.
claude-mem
Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future sessions. Works with Claude Code, OpenClaw, Codex, Gemini, Hermes, Copilot, OpenCode + More
ragflow
RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities to create a superior context layer for LLMs
PaddleOCR
Turn any PDF or image document into structured data for your AI. A powerful, lightweight OCR toolkit that bridges the gap between images/PDFs and LLMs. Supports 100+ languages.
crawl4ai
Open-source web crawler and scraper for LLMs and AI agents: any website into clean, LLM-ready Markdown. Run it yourself, or use Crawl4AI Cloud with one key. Join our Discord https://discord.gg/VuxzM8mtf
hello-agents
📚 《从零开始构建智能体》——从零开始的智能体原理与实践教程
Prompt-Engineering-Guide
🐙 Guides, papers, lessons, notebooks and resources for prompt engineering, context engineering, RAG, and AI Agents.
headroom
Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 20% fewer tokens for coding agents, 60-95% fewer tokens for JSON, same answers. Library, proxy, MCP server.
mem0
The Memory Layer for AI Agents - Drop-in memory infrastructure for AI agents and apps. Context that persists. Built for production.
anything-llm
Stop renting your intelligence. Own it with AnythingLLM. Everything you need for a powerful local-first agent experience
serviette
A no-code RAG server that keeps answers in sync with your documents. Works with 8 vector databases. Built on Pathway.
ai-agent-book
《深入理解 AI Agent：设计原理与工程实践》（李博杰 著）开源主仓库：全书正文、编译版 PDF 与按章配套代码
llama_index
LlamaIndex is the document processing platform for AI
JeecgBoot
【低代码v2.0，一句话即可生成整个系统】企业级AI低代码平台，一键生成前后端代码甚至整个系统。 AI Skills 一句话画流程、设计表单、生成报表、大屏。内置 AI应用平台涵盖：AI聊天、知识库、流程编排、MCP插件等，兼容主流大模型。引领AI低代码「Skills 生成 → 在线配置 → 代码生成 → 手工合并->AI修改」开发模式，解决 Java 项目 90% 重复工作，提高效率又不失灵活。
DeepTutor
DeepTutor: Lifelong Personalized Tutoring. https://deeptutor.info/.
milvus
Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search
langgraph
Build resilient agents.
LightRAG
[EMNLP2025] LightRAG: Simple and Fast Retrieval-Augmented Generation
PageIndex
📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG
quivr
An open-source engine that turns continuous content streams into search and monitoring. Durable ingestion, hybrid search, alerts, and plugins for formats, models and business rules.
Langchain-Chatchat
Langchain-Chatchat（原Langchain-ChatGLM）基于 Langchain 与 ChatGLM, Qwen 与 Llama 等语言模型的 RAG 与 Agent 应用 | Langchain-Chatchat (formerly langchain-ChatGLM), local knowledge based LLM (like ChatGLM, Qwen and Llama) RAG and Agent app with langchain
ai-engineering-hub
In-depth tutorials on LLMs, RAGs and real-world AI agent applications.
khoj
Your AI second brain. Self-hostable. Get answers from the web or your docs. Build custom agents, schedule automations, do deep research. Turn any online or local LLM into your personal, autonomous AI (gpt, claude, gemini, llama, qwen, mistral). Get started - free.
Vane
Vane is an AI-powered answering engine.
graphrag
A modular graph-based Retrieval-Augmented Generation (RAG) system
book-to-skill
Turn any technical book PDF into a Claude Code skill — ready to study, reference, and use while you work.
WeKnora
Open-source LLM knowledge platform: turn raw documents into a queryable RAG, an autonomous reasoning agent, and a self-maintaining Wiki.