Best
Top Open Source RAG Frameworks
RAG frameworks differ in data connectors, retrieval control, agent integration, and production operations. This page highlights projects with strong ecosystem fit and clear implementation paths.
Selection criteria
Retrieval capability
Data integration
LLM workflow support
Production readiness
Featured projects
#1
langchain
langchain-ai/langchain53The agent engineering platform.
Evaluating langchain for Python AI workflows.
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#2llama_index
run-llama/llama_index52LlamaIndex is the leading document agent and OCR platform
Evaluating llama_index for Python AI workflows.
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#3haystack
deepset-ai/haystack48Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for scalable agents, RAG, multimodal applications, semantic search, and conversational systems.
Evaluating haystack for MDX AI workflows.
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