Best AI Agent Frameworks (32 Tools) — AI Agent Tools Directory

LangChain

Framework for building applications powered by large language models with composable components.

AI Agent Frameworks open-source

CrewAI

Multi-agent orchestration framework for building collaborative AI agent teams.

AI Agent Frameworks open-source

AutoGen

Microsoft's framework for building multi-agent conversational AI systems.

AI Agent Frameworks open-source

Semantic Kernel

Microsoft's AI orchestration SDK for integrating LLMs into applications.

AI Agent Frameworks open-source

LlamaIndex

Data framework for connecting custom data sources to large language models.

AI Agent Frameworks open-source

Haystack

Open-source NLP framework by deepset for building search and retrieval pipelines.

AI Agent Frameworks open-source

Vercel AI SDK

TypeScript toolkit for building AI-powered user interfaces with streaming support.

AI Agent Frameworks open-source

Phidata

Framework for building autonomous AI assistants with memory, knowledge, and tools.

AI Agent Frameworks open-source

SuperAGI

Open-source framework for building, managing, and running autonomous AI agents.

AI Agent Frameworks open-source

MetaGPT

Multi-agent framework that takes a one-line requirement and outputs full software projects.

AI Agent Frameworks open-source

DSPy

Stanford framework for programming with foundation models using declarative language model calls.

AI Agent Frameworks open-source

LangGraph

Framework for building stateful, multi-step agent workflows as graphs with LangChain integration.

AI Agent Frameworks open-source

Smolagents

Hugging Face's lightweight framework for building simple yet powerful AI agents.

AI Agent Frameworks open-source

Pydantic AI

Agent framework from the Pydantic team with type-safe, model-agnostic agent building in Python.

AI Agent Frameworks open-source

Camel AI

Multi-agent framework for studying and building communicative AI agents with role-playing capabilities.

AI Agent Frameworks open-source

Agency Swarm

Framework for creating collaborative AI agent swarms with customizable agent communication flows.

AI Agent Frameworks open-source

Letta

Framework for building AI agents with long-term memory and stateful reasoning (formerly MemGPT).

AI Agent Frameworks open-source

OpenAI Agents SDK

OpenAI's lightweight production-ready agent framework evolved from Swarm with built-in tool use and handoffs.

AI Agent Frameworks open-source

Google ADK

Google's Agent Development Kit -- code-first Python toolkit optimized for Gemini with multi-agent orchestration.

AI Agent Frameworks open-source

Anthropic Agent SDK

Anthropic's official SDK for building agents with Claude featuring custom tools, hooks, and guardrails.

AI Agent Frameworks open-source

Mastra

TypeScript-first AI agent framework from the Gatsby team with 300k+ weekly npm downloads and MCP support.

AI Agent Frameworks open-source

Agno

High-performance multi-modal agent runtime formerly known as Phidata, with 26k GitHub stars.

AI Agent Frameworks open-source

AutoGPT

Pioneering autonomous AI agent platform with 170k GitHub stars and a marketplace for agent templates.

AI Agent Frameworks open-source

Nexos Swarm

Multi-agent orchestration platform enabling swarm intelligence and coordinated task execution across agent teams.

AI Agent Frameworks paid

Claude Agent Teams

Anthropic's multi-agent orchestration feature for Claude Opus enabling 16+ Claude instances to collaborate on complex projects like building compilers.

AI Agent Frameworks paid

Synkra AIOS

Universal AI agent framework for full-stack development with self-modifying capabilities. Supports Claude Code, Gemini CLI, Codex CLI, Cursor, and Copilot with agent-driven agile development workflows.

AI Agent Frameworks open-source

Amazon Nova Act

AWS service for building and deploying reliable AI agents that automate production browser-based UI workflows at scale, powered by the Nova 2 Lite model.

AI Agent Frameworks paid

Strands Agents

Open-source model-driven agent SDK from AWS supporting Python and TypeScript with multi-agent patterns, MCP integration, and model-agnostic design.

AI Agent Frameworks open-source

Swarms

Enterprise-grade multi-agent orchestration framework enabling thousands of AI agents to collaborate on complex tasks with production-ready reliability.

AI Agent Frameworks open-source

BabyAGI

Task-driven autonomous agent framework that uses AI to create, prioritize, and execute tasks in a continuous loop toward a defined objective.

AI Agent Frameworks open-source

ControlFlow

Python framework for building agentic AI workflows with structured task orchestration, type-safe outputs, and seamless integration with existing codebases.

AI Agent Frameworks open-source

Microsoft Agent Framework

Unified AI agent SDK merging AutoGen and Semantic Kernel. Provides multi-agent orchestration, tool use, and enterprise-grade agent development. 1.0 GA targeted Q1 2026.

AI Agent Frameworks open-source

⚙️ Best AI Agent Frameworks

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