Best Anthropic Agent SDK Alternatives
98 frameworks you can use instead of Anthropic Agent SDK. Ranked by popularity, tag overlap, and live GitHub signals.
anthropicclaudemcptool-usepythonagents
A
Anthropic Agent SDK
ReferenceClaude-native agent framework with built-in MCP and tool use — 4.6K stars
4.6K2.5M/w2d ago60
Top Alternatives to Anthropic Agent SDK
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fastmcp
Pythonic framework for building MCP servers and clients with minimal boilerplate
OSSFree
Prefect
4 shared tags
R
RAGFlow
Open-source RAG engine with agent capabilities, GraphRAG, and MCP integration
OSSFree
InfiniFlow
4 shared tags
A
Agno
Build, run, and manage agentic software at scale with 38K+ stars
OSSFree
Agno AGI
39.1Ktoday399
3 shared tags
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Letta
Stateful agents with long-term memory — formerly MemGPT — 15K stars
OSSFree
Letta
15.0K120.0K/w5d ago150
3 shared tags
F
FastMCP
The fast, Pythonic way to build MCP servers — 24K+ stars
OSSFree
Prefect
24.2Ktoday209
3 shared tags