All ChatGPT alternatives

Open-source alternatives to ChatGPT

4 projects you can self-host, audit and use for free — ranked by community votes.

  1. 1

    Jan

    An open-source ChatGPT alternative that runs 100% offline

  2. 2

    LibreChat

    The open-source AI chat platform for every model

  3. 3

    Ollama

    Run open models locally — nothing leaves your machine

  4. 4

    Open WebUI

    Self-hosted AI chat interface that works with any LLM

Looking for more? Browse every open-source app

4 Best Open-Source ChatGPT Alternatives in 2026 — AlternativeTo