best-of ranking · updated nightly

Best Open Source AI & Machine Learning Tools

Ranked by GitHub stars — actual adoption, not editorial taste. All 10 are free, open source and self-hostable; license and last activity on every entry.

  1. 1
    OpenClaw ★ 390K

    An AI assistant that acts, not just answers

    NOASSERTION TypeScript pushed 2026-09-17 details →
  2. 2
    Hermes Agent ★ 246K

    Desktop AI agent with persistent memory across platforms

    MIT Python pushed 2026-09-17 details →
  3. 3
    Ollama ★ 181K

    Run open-source LLMs locally on your own machine

    MIT Go pushed 2026-09-17 details →
  4. 4
    Dify ★ 156K

    Build and deploy AI agents and RAG pipelines visually

    NOASSERTION TypeScript pushed 2026-09-17 details →
  5. 5
    Open WebUI ★ 152K

    One interface for every AI model you run or connect

    NOASSERTION Python pushed 2026-09-17 details →
  6. 6
    langchain ★ 147K

    The agent engineering platform.

    MIT Python pushed 2026-09-17 details →
  7. 7
    ponytail ★ 141K

    Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

    MIT JavaScript pushed 2026-09-14 details →
  8. 8
    llama.cpp ★ 129K

    Run LLMs locally with minimal setup, maximum hardware support

    MIT C++ pushed 2026-09-17 details →
  9. 9

    21 Lessons, Get Started Building with Generative AI

    MIT Jupyter Notebook pushed 2026-09-17 details →
  10. 10
    graphify ★ 119K

    Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini

    Apache-2.0 Python pushed 2026-09-16 details →
method stars desc · snapshot from github api refresh nightly

last updated nightly · ranking method: github stars, live-tracked

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Frequently asked questions

What is the best open source AI & Machine Learning tool in 2026?

OpenClaw leads the ranking with 389,982 GitHub stars, ahead of Hermes Agent. Rankings use live GitHub star counts, refreshed nightly.

How is this list of AI & Machine Learning tools ranked?

By GitHub stars — a proxy for adoption and community size. Each entry also shows its licence, primary language and last commit date, so you can judge maintenance activity rather than trusting the ranking alone.

Are the best AI & Machine Learning tools free?

Every project on this list is open source and free to self-host. Some also offer paid managed hosting, but the software itself carries no licence fee.