Top Open-Source AI Projects on GitHub (2026): Agents, LLM Tools & Frameworks
Popular open-source AI agent frameworks, local LLM runners and AI app builders ranked by GitHub stars.
Source: GitHub REST API (api.github.com/repos/…) · Data checked on 2026-10-21 · Machine-readable JSON
| Rank | Project | Stars | Best for (repo description) | Language | License |
|---|---|---|---|---|---|
| 1 | n8n-io/n8n | 208,218 | Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations. | TypeScript | See repo |
| 2 | Significant-Gravitas/AutoGPT | 187,695 | AutoGPT is the vision of accessible AI for everyone, to use and to build on. Our mission is to provide the tools, so that you can focus on what matters. | Python | See repo |
| 3 | ollama/ollama | 184,155 | Get up and running with Kimi, GLM, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models. | Go | MIT |
| 4 | langgenius/dify | 159,136 | Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype to production without rebuilding the stack. | Python | See repo |
| 5 | open-webui/open-webui | 156,353 | User-friendly AI Interface (Supports Ollama, OpenAI API, ...) | Python | See repo |
| 6 | langchain-ai/langchain | 148,198 | The agent engineering platform. | Python | MIT |
| 7 | ggml-org/llama.cpp | 131,914 | LLM inference in C/C++ | C++ | MIT |
| 8 | browser-use/browser-use | 118,749 | Open-source Python library for AI browser agents, plus Browser Use Cloud: stealth browsers and a hosted agent API. | Python | MIT |
| 9 | vllm-project/vllm | 94,726 | A high-throughput and memory-efficient inference and serving engine for LLMs | Python | Apache-2.0 |
| 10 | infiniflow/ragflow | 92,601 | RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities to create a superior context layer for LLMs | Go | Apache-2.0 |
| 11 | microsoft/autogen | 61,508 | A programming framework for agentic AI | Python | CC-BY-4.0 |
| 12 | crewAIInc/crewAI | 59,952 | Framework for orchestrating role-playing, autonomous AI agents. By fostering collaborative intelligence, CrewAI empowers agents to work together seamlessly, tackling complex tasks. | Python | MIT |
| 13 | run-llama/llama_index | 52,602 | LlamaIndex is the document processing platform for AI | Python | MIT |
Methodology
We picked well-known open-source AI frameworks, LLM runtimes and agent/app builders and pulled live star counts from the GitHub API. Stars measure popularity, not quality. The list is curated, not exhaustive. All are free to self-host; "Best for" is the project's own GitHub description.
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