Langroid
A lightweight Python framework for multi-agent LLM applications, from CMU and UW-Madison researchers.
Sources and review
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Developers who want a small, principled multi-agent framework without LangChain.
About Langroid
Langroid, created by researchers from CMU and UW-Madison, lets you set up agents with optional LLMs, vector stores and tools, give them tasks and have them solve problems by exchanging messages, in an actor-inspired multi-agent design. It does not depend on LangChain or other LLM frameworks and works with practically any LLM.
Langroid is an open-source project written primarily in Python, with 4.1k stars on GitHub. It was last updated in September 2026.
pip install langroid
