Agent Development Kit (ADK)

Graph-based agent orchestration. Stateful loops with checkpoints.

LangChain's agent layer. Model agents as nodes in a state graph with persistent checkpoints, human-in-the-loop steps, and durable execution. Strong when you need a long-running, debuggable agent rather than a one-shot chain.

Multi-agent framework with explicit roles and tasks.

Python framework for orchestrating crews of specialised agents — researcher, writer, reviewer — coordinated through shared context. Opinionated about roles, sequencing, and delegation; good fit for content-and-research pipelines.

High-performance Python framework for multi-agent systems.

Agno is an open-source Python framework for building multi-agent systems with memory, knowledge, tools, and reasoning. Agents are fast to instantiate and can be composed into teams, and the companion AgentOS runtime serves them in production as a FastAPI app with a control plane.

Open SDK for production AI agents in .NET and Python.

Microsoft's multi-language framework for building, orchestrating, and operating AI agents and multi-agent workflows. It offers a consistent API across C#/.NET and Python with first-class support for both, plus built-in durability, restartability, observability, and human-in-the-loop control. Provider-flexible, so the underlying models can change without rewrites.