learn.microsoft.com · Agent Frameworks
Microsoft's model agnostic SDK for integrating LLMs and agents into C#, Python and Java applications.
Semantic Kernel is one of 18 agent framework tools on Drydock. See all agent framework tools or how we check facts.
// guides
MCP connects an agent to tools and data; A2A connects agents to other agents. Learn when to use each, how they fit together, and what changed in 2026.
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Agnoagno.comPython framework and runtime for multiagent systems with memory, knowledge and tools.Agent FrameworksOpen source★ 42.9k
LangChainlangchain.comWidely used framework for building LLM applications and agents, with hundreds of model, tool and data integrations.Agent FrameworksOpen source★ 148.6k
CrewAIcrewai.comPython framework for orchestrating role playing teams of agents that collaborate on tasks, plus an enterprise platform.Agent FrameworksOpen source★ 60.2k
smolagentshuggingface.coHugging Face's minimal library for agents that think in code, working with any model.Agent FrameworksOpen source★ 30.1k
Pydantic AIpydantic.devAgent framework from the Pydantic team that brings type safety and structured outputs to LLM apps.Agent FrameworksOpen source★ 20.9k
LlamaIndexllamaindex.aiFramework for building agents over your data, strong on ingestion, indexing, retrieval and document workflows.Agent FrameworksOpen source★ 52.7k