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Agent Frameworks

Python and JS frameworks for building multi-step LLM apps.

Agent frameworks let you compose LLM calls, tools, memory, and control flow into shippable applications. LangChain and LlamaIndex are the most-adopted; CrewAI and AutoGen specialize in multi-agent orchestration; PydanticAI brings type-safety.

5 entries · alphabetic · free tier (Pro adds Quality Score ranking)

AutoGen

pip

Microsoft Research framework for multi-agent conversational AI.

agent-framework multi-agent microsoftMIT1 source

CrewAI

pip

Multi-agent orchestration framework with role-based agent definitions.

agent-framework multi-agent orchestrationMIT1 source

LangChain

pip

Most-adopted framework for chaining LLM calls, tools, and agents. Python and JS/TS.

agent-framework open-source pythonMIT1 source

LlamaIndex

pip

Data framework for LLM apps — strongest in document ingestion and RAG pipelines.

agent-framework rag open-sourceMIT1 source

PydanticAI

pip

Type-safe Python agent framework from the Pydantic team; MCP-native tool integration.

agent-framework python type-safeMIT1 source
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