Open-Source Agents

Frameworks and harnesses you can run, fork, and self-host.

Open-source libraries. Hosted LangSmith is optional and paid at scale.

The default agent-engineering toolkit. Use LangGraph when the workflow needs state, retries, and branches — not a single prompt loop.

Open-source multi-agent framework. Enterprise cloud is optional.

Role-based crews (researcher, writer, reviewer). Fastest path to a multi-agent demo that is still readable.

MIT-licensed self-hosted coding agent. You provide compute + model.

Open-source Devin-style agent you run in Docker. Use when you want a sandboxed coding agent without a SaaS bill.