Best Open-source AI Application Frameworks & Orchestration tools

RAGFlow

RAG engine with deep document understanding and agents

Dify

Open-source platform for building production-ready LLM applications

Sim

Rapidly build, run, and scale AI agent workflows.

Haystack

End-to-end LLM framework for building production-ready RAG applications

LangChain

Build reliable LLM agents with interchangeable components

Claude-Flow

AI-driven orchestration platform for coordinated multi-agent development

Langflow

Visual builder for AI agents and workflows with API deployment

LlamaIndex

Modular Python framework to index and query data for LLMs.

Flowise

Build and deploy AI agents visually with low-code workflows