Open-source alternatives to LangGraph

LangGraph's core library is MIT-licensed and open source, but the piece most teams eventually need for production — the deployment/server runtime (langgraph-api, sold as LangGraph Platform) — is licensed under the Elastic License 2.0 and requires a commercial license to run in production. That's the actual friction point: the orchestration framework is free, but hosting agents built on it at scale typically means paying LangChain Inc. or building your own deployment layer.

Letta takes a different approach, built around agents with persistent memory that improve over time, and is fully open source including its runtime. Suna is aimed at autonomous agents that handle real-world tasks end to end rather than LangGraph's lower-level graph-orchestration model — worth a look if you want a more turnkey agent rather than a framework to build one with.

FAQ

Is there a free, open-source alternative to LangGraph's deployment platform?

Yes. Letta is fully open source, including its runtime, avoiding the commercial license LangGraph Platform requires for production deployment.

What's the best open-source alternative to LangGraph?

Letta is the closer match if you want an open-source framework with persistent agent memory. Suna is worth choosing if you want a more autonomous, ready-to-run agent rather than a lower-level orchestration framework.

Do I need to pay to run LangGraph in production?

LangGraph the library is MIT-licensed and free, but its production server runtime (LangGraph Platform) requires a commercial license. Letta avoids that by keeping its full stack open source.

What are the top open-source alternatives to LangGraph?

Browse all open-source alternatives to LangGraph above, or explore the full Developer Tools category for more options.