LangGraph
Graph-based framework for building stateful, controllable multi-agent workflows.
β langchain.comLangChain
The original, broad LLM framework with integrations to nearly every model and tool.
β langchain.comCrewAI
Role-based framework for orchestrating teams of collaborating agents.
β crewai.comPydanticAI
Type-safe Python agent framework from the team behind Pydantic.
β ai.pydantic.devLlamaIndex
Data framework specializing in connecting LLMs and agents to your data.
β llamaindex.aiMastra
TypeScript-first framework for building agents, workflows, and RAG.
β mastra.aiAgents SDK
OpenAI's lightweight SDK for building multi-agent systems with handoffs and guardrails.
β openai.github.io