Agent frameworks

LA

Langflow

Open-source visual builder for AI agents, RAG apps and MCP servers, with an API server included.

LA

LangGraph

Open-source orchestration framework and runtime for stateful, long-running LLM agents, from LangChain.

AG

AgentsKitVerified

Composable TypeScript packages for building AI agents, with swappable model, memory, tool and UI layers.

AG

Agno

Python SDK plus self-hosted AgentOS runtime and hosted control plane for building and operating agents.

CS

Claude Agent SDK

Python and TypeScript library that runs Claude Code's agent loop and tools inside your own application.

G(

Google Agent Development Kit (ADK)

Open-source framework for building, evaluating and deploying AI agents in Python, TypeScript, Go, Java or Kotlin.

MF

Microsoft Agent Framework

Open-source .NET, Python and Go SDK for building AI agents and graph-based multi-agent workflows.

MA

Mastra

Open-source TypeScript framework for building AI agents, with a hosted platform for running and observing them.

LE

Letta

Stateful agent harness, cloud and SDK for agents with persistent, git-versioned memory.

LA

LiveKit Agents

Open-source Python and Node.js framework for voice AI agents, with LiveKit Cloud hosting, telephony and observability.

AU

AutoGen

Open-source Microsoft framework for building single and multi-agent AI applications in Python.

LL

LlamaIndex

Open-source agent framework plus a credit-metered document parsing, extraction and indexing platform.

O(

OpenAI Agents SDK (Python)

Open-source Python framework for building agents with tools, handoffs, guardrails and tracing.

PA

Pydantic AI

Open-source Python agent framework from the Pydantic team, with a typed agent loop and swappable models.

CR

CrewAI

Open-source multi-agent framework with a managed platform for deploying and governing agent workflows.

LA

LangChain

Open source agent frameworks plus LangSmith, a hosted platform to trace, evaluate, deploy and govern agents.