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Best Multi-agent frameworks, ranked
11 agents, scored on our rubric. Last updated 2026-10-23.
| # | Agent | Score | Starting price | Best for |
|---|---|---|---|---|
| 1 | LangGraph Graph-based framework for stateful, controllable multi-agent systems. | 8.6 | Free (open source); LangSmith Plus $39/seat/mo | Production agents needing control and state |
| 2 | Claude Agent SDK The harness behind Claude Code, packaged for building your own agents. | 8.3 | Free SDK (pay for Claude API) | Building coding-style autonomous agents |
| 3 | CrewAI Python framework for role-based crews of collaborating agents. | 8 | Free (MIT); AMP Basic free (50 executions/mo) | Fast multi-agent prototypes |
| 4 | Microsoft Agent Framework Microsoft's successor to AutoGen and Semantic Kernel for .NET and Python agents. | 8 | Free (open source) | Enterprise .NET/Python teams, especially on Azure |
| 5 | OpenAI Agents SDK Lightweight SDK for agents with tools, handoffs, guardrails and tracing. | 8 | Free (open source) | Teams wanting minimal abstractions |
| 6 | Google Agent Development Kit (ADK) Google's open-source framework for multi-agent systems with A2A interoperability. | 8 | Free (open source) | Teams on Google Cloud or needing A2A |
| 7 | Mastra TypeScript framework for agents, workflows, memory and evals. | 8 | Free (Apache 2.0); Teams $250/mo | TypeScript/JS teams |
| 8 | Pydantic AI Type-safe Python agent framework from the Pydantic team. | 7.7 | Free (open source) | Python teams that value type safety |
| 9 | Agno Open-source framework and AgentOS runtime for multi-agent teams. | 7.6 | Free (open source); Control Plane Pro $150/mo | Python teams wanting a fast runtime plus UI |
| 10 | LlamaIndex Workflows Event-driven framework for data-heavy agents and document workflows. | 7.5 | Free (open source); LlamaParse from $50/mo | Agents over documents and enterprise data |
| 11 | smolagents Hugging Face's minimal library for code-writing agents. | 7.2 | Free (open source) | Experiments with open models |