2,002 offers
Free Agent Frameworks — open-source & self-hostable
SDKs to build agents & multi-agent systems
Scores rate free-tier value on a 1–10 scale. How scores work →
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LangChain Agent Frameworks 8.4 The agent engineering platform. 140.9k★707/90d8 devs/90d -
Agno Agent Frameworks 8.0 Build, run, and manage agent platforms. 41k★426/90d45 devs/90d -
Vercel AI SDK Agent Frameworks 7.9 The AI Toolkit for TypeScript. From the creators of Next.js, the AI SDK is a free open-source library for building AI-powered applications and agents 25.3k★952/90d23 devs/90d -
CrewAI Agent Frameworks 7.8 Framework for orchestrating role-playing, autonomous AI agents. By fostering collaborative intelligence, CrewAI empowers agents to work together seamlessly, tackling complex tasks. 54.9k★432/90d12 devs/90d -
LlamaIndex Agent Frameworks 7.8 LlamaIndex is the leading document agent and OCR platform 50.6k★129/90d47 devs/90d -
Haystack Agent Frameworks 7.8 Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for scalable agents, RAG, multimodal applications, semantic search, and conversational systems. 25.8k★464/90d22 devs/90d -
Mastra Agent Frameworks 7.8 From the team behind Gatsby, Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack. 25.8k★2.4k/90d32 devs/90d -
Google ADK Agent Frameworks 7.7 An open-source, code-first Python toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control. 20.4k★725/90d34 devs/90d -
Pydantic AI Agent Frameworks 7.6 AI Agent Framework, the Pydantic way 18.2k★448/90d48 devs/90d -
LangGraph Agent Frameworks 7.5 Build resilient agents. 36.4k★288/90d13 devs/90d -
OpenAI Agents SDK Agent Frameworks 7.5 A lightweight, powerful framework for multi-agent workflows 27.6k★345/90d37 devs/90d -
AgentScope Agent Frameworks 7.5 Build and run agents you can see, understand and trust. 27.4k★132/90d29 devs/90d -
DSPy Agent Frameworks 7.4 DSPy: The framework for programming—not prompting—language models 35.8k★124/90d23 devs/90d -
Semantic Kernel Agent Frameworks 7.3 Integrate cutting-edge LLM technology quickly and easily into your apps 28.3k★90/90d16 devs/90d -
CAMEL Agent Frameworks 7.3 🐫 CAMEL: The first and the best multi-agent framework. Finding the Scaling Law of Agents. https://www.camel-ai.org 17.3k★85/90d30 devs/90d -
Microsoft Agent Framework Agent Frameworks 7.3 A framework for building, orchestrating and deploying AI agents and multi-agent workflows with support for Python and .NET. 11.9k★636/90d20 devs/90d -
Motia Agent Frameworks 7.2 Effortlessly compose, extend, and observe every service in real-time for the first time ever. 18.4k★427/90d12 devs/90d -
PraisonAI Agent Frameworks 7.1 PraisonAI 🦞 — Hire a 24/7 AI Workforce. Stop writing boilerplate and start shipping autonomous self-improving agents that research, plan, code, and execute tasks. Deployed in 5 lines of code with built-in memory, RAG, and support for 100+ LLMs. 8.3k★1.9k/90d2 devs/90d -
Strands Agents Agent Frameworks 7.1 Build an agent harness and control it end-to-end. Open-source SDK for production AI agents in Python & TypeScript - any model, any cloud. 6.4k★641/90d31 devs/90d -
Kiln Agent Frameworks 6.8 Build, Evaluate, and Optimize AI Systems. Includes evals, RAG, agents, fine-tuning, synthetic data generation, dataset management, MCP, and more. 4.9k★1k/90d6 devs/90d -
AG2 Agent Frameworks 6.8 AG2 (formerly AutoGen): The Open-Source AgentOS.Join us at: https://discord.gg/sNGSwQME3x 4.7k★335/90d17 devs/90d -
Agency Swarm Agent Frameworks 6.7 Reliable Multi-Agent Orchestration Framework 4.5k★344/90d4 devs/90d -
Swarms Agent Frameworks 6.6 The Enterprise-Grade Production-Ready Multi-Agent Orchestration Framework. Website: https://swarms.ai 6.9k★164/90d4 devs/90d -
Cloudflare Agents SDK Agent Frameworks 6.6 Build and deploy AI agents on Cloudflare — each agent gets its own state, storage, and lifecycle on Durable Objects, with built-in scheduling, MCP, and workflows. 5.2k★383/90d5 devs/90d -
VoltAgent Agent Frameworks 6.5 AI Agent Engineering Platform built on an Open Source TypeScript AI Agent Framework 9.9k★56/90d14 devs/90d -
Flue Agent Frameworks 6.5 The agent harness framework: build headless, programmable agents in TypeScript and deploy them anywhere — Node, Cloudflare, or CI. 7.1k★1k/90d1 devs/90d -
BeeAI Framework Agent Frameworks 6.4 Build production-ready AI agents in both Python and Typescript. 3.3k★61/90d22 devs/90d -
smolagents Agent Frameworks 6.3 🤗 smolagents: a barebones library for agents that think in code. 28.2k★13/90d7 devs/90d -
Upsonic Agent Frameworks 6.3 Build autonomous AI agents in Python. 7.9k★60/90d6 devs/90d -
Atomic Agents Agent Frameworks 6.2 Building AI agents, atomically 6k★56/90d5 devs/90d -
AutoGen Agent Frameworks 6.0 A programming framework for agentic AI 59.5k★1/90d1 devs/90d -
Dapr Agents Agent Frameworks 5.9 Build autonomous, resilient and observable AI agents with built-in workflow orchestration, security, statefulness and telemetry. 702★194/90d7 devs/90d -
OpenAI Swarm Agent Frameworks 5.6 Educational framework exploring ergonomic, lightweight multi-agent orchestration. Managed by OpenAI Solution team. 21.8k★1/90d1 devs/90d -
BabyAGI Agent Frameworks 5.1 Influential lightweight experiment in task-driven autonomous agents that spawn, prioritize, and execute their own tasks. 22.3k★0/90d0 devs/90d -
Lagent Agent Frameworks 4.9 A lightweight framework for building LLM-based agents 2.3k★1/90d1 devs/90d -
12-Factor Agents Agent Frameworks 4.6 What are the principles we can use to build LLM-powered software that is actually good enough to put in the hands of production customers? 24k★0/90d0 devs/90d -
mcp-agent Agent Frameworks 4.6 Build effective agents using Model Context Protocol and simple workflow patterns 8.4k★0/90d0 devs/90d -
AgentKit by Inngest Agent Frameworks 4.5 AgentKit: Build multi-agent networks in TypeScript with deterministic routing and rich tooling via MCP. 910★3/90d1 devs/90d -
SuperAGI Agent Frameworks 4.4 <⚡️> SuperAGI - A dev-first open source autonomous AI agent framework. Enabling developers to build, manage & run useful autonomous agents quickly and reliably. 17.6k★0/90d0 devs/90d