Top 10 Most Starred AI Agent Frameworks on GitHub (2026)

AI agents are reshaping how we build software. GitHub stars are a strong indicator of developer trust and community adoption. Here are the top 10 most starred AI agent frameworks heading into 2026.

1. LangChain ⭐ 122,850

langchain-ai/langchain | Python | MIT

The most popular framework for building LLM-powered applications, with extensive tooling for chains, agents, and retrieval.

2. MetaGPT ⭐ 61,919

FoundationAgents/MetaGPT | Python | MIT

A multi-agent framework that simulates a software company, with agents taking on roles like product manager, architect, and engineer.

3. AutoGen ⭐ 52,927

microsoft/autogen | Python | CC-BY-4.0

Microsoft's framework for building multi-agent conversational systems with customizable agent behaviors.

4. LlamaIndex ⭐ 46,100

run-llama/llama_index | Python | MIT

The leading framework for connecting LLMs to your data, with powerful indexing and retrieval capabilities.

5. CrewAI ⭐ 41,871

crewAIInc/crewAI | Python | MIT

Framework for orchestrating role-playing autonomous agents that collaborate to accomplish complex tasks.

6. Agno ⭐ 36,414

agno-agi/agno | Python | Apache-2.0

A multi-agent framework with a runtime and control plane for managing agent deployments at scale.

7. Haystack ⭐ 23,741

deepset-ai/haystack | Python | Apache-2.0

Production-ready AI orchestration framework focused on building customizable LLM applications and RAG pipelines.

8. Vercel AI SDK ⭐ 20,400

vercel/ai | TypeScript | Apache-2.0

The AI toolkit for TypeScript from the creators of Next.js, designed for building AI-powered web applications.

9. Open-AutoGLM ⭐ 19,800

zai-org/Open-AutoGLM | Python | Apache-2.0

An open-source phone agent model and framework for building mobile device automation agents.

10. Mastra ⭐ 19,021

mastra-ai/mastra | TypeScript | Apache-2.0

A TypeScript-native AI agent framework with built-in workflows, tools, and integrations.

Special Mentions

Stars don't tell the whole story. These frameworks have fewer stars but are gaining momentum with high download counts and modern architectures.

• OpenAI Agents SDK ⭐ 18,022 — Official OpenAI framework for multi-agent workflows
• Google ADK Python ⭐ 16,800 — Google's new agent development toolkit
• Pydantic AI ⭐ 14,000 — The Pythonic way to build AI agents

Key Takeaways

• Python dominates: 8 out of 10 top frameworks are Python-based
• LangChain leads by a massive margin with 2x the stars of the runner-up
• TypeScript options: Vercel AI SDK and Mastra for JS/TS developers
• Watch the special mentions: Momentum matters more than legacy stars

What to Read Next

• The Future of AI Building: Workflows, Agents, and Everything In Between
• LangGraph vs LlamaIndex: Who Makes AI Agents Easier in JavaScript?
• Getting Started with OpenAI's Agents SDK for TypeScript

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Star counts as of January 2026. Numbers change—check the repos for the latest.