Frustration with LangChain is what led us (ex-CMU/UW-Madison researchers) to start building Langroid[1], a multi-agent LLM framework. We have been thoughtful about designing the right primitives and abstractions to enable a simple developer experience while supporting sophisticated workflows using single or multiple agents. There is an underlying loop-based orchestration mechanism that handles user interaction, tool handling and inter-agent handoff/communication.

We have companies using Langroid in production.

[1] Langroid: https://github.com/langroid/langroid