Alternatives to Google ADK

LangChain's low-level agent orchestration runtime: durable graphs, streaming, human-in-the-loop, and persistence. About 39,835 GitHub stars.

OpenAI's official Python and TypeScript agent runtime: agents, handoffs, guardrails, sessions, and tracing.

Python multi-agent framework with crews, flows, and an Enterprise Cloud from $99/seat. AMP is now that cloud, not a separate product name.