Open source rag projects
Every project in the registry tagged rag, ranked by real GitHub adoption.
One interface for every AI model you run or connect
LlamaIndex is the document processing platform for AI
[EMNLP2025] LightRAG: Simple and Fast Retrieval-Augmented Generation
A modular graph-based Retrieval-Augmented Generation (RAG) system
📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG
Unified AI-powered enterprise search across company data
Python scraper based on AI
Build powerful AI knowledge bases with ease
An open-source RAG-based tool for chatting with your documents.
open-source agentic AI data assistant for the next generation of AI + Data products.
Open source agentic operating system
Privacy-first knowledge base with any AI model you choose
A lightweight, lightning-fast, in-process vector database
💡 All-in-one AI framework for semantic search, LLM orchestration and language model workflows
All-in-one LLM CLI tool featuring Shell Assistant, Chat-REPL, RAG, AI Tools & Agents, with access to OpenAI, Claude, Gemini, Ollama, Groq, and more.
World's first open-source enterprise world model.
Python & Command-line tool to gather text and metadata on the Web: Crawling, scraping, extraction, output as CSV, JSON, HTML, MD, TXT, XML
Turn your PC, Mac, or Linux box into an AI server. LLM inference, chat UI, voice, agents, workflows, RAG, and image generation.
Open-source framework for building agentic apps in JavaScript, Go, Dart, and Python, built and used in production by Google
Unify vector search and graph traversals in one database
MineContext is your proactive context-aware AI partner（Context-Engineering+ChatGPT Pulse）
A bio-inspired cognitive memory engine — a new paradigm for Graph RAG.
Get instant answers from your company knowledge
Build fast and accurate GenAI apps with GraphRAG SDK at scale 🌟
Long-term memory for AI assistants. Graph + vector store that recalls decisions, relationships, and context across sessions.
Related tags
Frequently asked questions
How many open source rag projects are there?
This registry tracks 25 projects tagged rag, with 578,152 GitHub stars between them. The most-adopted is Open WebUI at 152,394 stars.
Are these rag projects free to use?
Yes — 21 of the 25 carry an explicit open-source licence across 2 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which rag project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these rag projects still maintained?
23 of the 25 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.