Multi-Agent Orchestration

For workflows where multiple agents or tools hand off to one another. These frameworks model the control flow — graphs, roles, or crews — and manage the shared state that flows across steps.

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Agno

Agno

Agno

High-performance framework and runtime (AgentOS) for multi-agent systems

v2.8.12026-07-23PythonApache-2.0
41.4k Open source Free tier Paid
AutoGen

AutoGen

Microsoft

Microsoft's multi-agent conversation framework (maintenance-only; new work moved to Microsoft Agent Framework)

Maintenance onlyNo updates in 6+ monthspython-v0.7.52025-09-30PythonMIT
59.9k Completely free Open source
CrewAI

CrewAI

CrewAI

Role-based multi-agent orchestration — assemble a crew of agents with goals and tasks.

v1.15.52026-07-20PythonMIT
56.0k Open source Free tier Paid
LangChain

LangChain

LangChain

The original LLM-app framework — standard model/tool interfaces, hundreds of integrations, and the create_agent prebuilt that compiles to a LangGraph agent

langchain-core==1.5.12026-07-23Python / JSMIT
142.4k Completely free Open source
LangGraph

LangGraph

LangChain

Graph-based orchestration for stateful, multi-step agents with branching, loops, and human-in-the-loop

v1.2.92026-07-10Python / JSMIT
38.0k Open source Free tier Paid

OpenAI's lightweight SDK for agents with tools, handoffs, and guardrails

v0.18.32026-07-17PythonMIT
28.1k Completely free Open source
smolagents

smolagents

Hugging Face

Hugging Face's minimal library for agents that act by writing and running code

v1.26.02026-05-29PythonApache-2.0
28.5k Completely free Open source