Open source
LangGraph
Low-level framework for stateful, long-running agents as graphs
Agent FrameworksStateful graph based agents
Alternatives to LangChain
12 tools like LangChain, chosen by what they do. About LangChain
Open source
AutoGen
Microsoft's open source framework for building multi-agent AI apps
Agent FrameworksMicrosoft multi-agent toolkit
Open source
CrewAI
Open source framework for building teams of collaborating AI agents
Agent FrameworksMulti-agent framework
Open source
VoltAgent
TypeScript framework for AI agents with built-in observability
Agent FrameworksTypeScript AI agent framework
Open source
Semantic Kernel
Microsoft SDK for AI agents in C#, Python and Java
Agent FrameworksMicrosoft AI orchestration SDK
Open source
Genkit
Open source toolkit from Google for building AI apps and agents
Agent FrameworksFull stack AI app framework
Open source
DSPy
Framework for programming LLM pipelines with typed signatures
Agent FrameworksProgram LLMs, not prompt them
Open source
Google Agent Development Kit
Open source framework for multi-agent systems in several languages
Agent FrameworksGoogle Agent Development Kit
Open source
OpenAI Agents SDK
Lightweight Python SDK for agents, handoffs and guardrails
Agent FrameworksOpenAI lightweight agent SDK
Curated
Mastra
TypeScript framework for agents with tools, memory and workflows
Agent FrameworksTypeScript agent framework
Open source
Agno
Platform and framework for building agent teams in your own cloud
Agent FrameworksBuild and run agent teams
Open source
Instructor
Library for getting structured, validated data from LLM output
Agent FrameworksStructured outputs from LLMs