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Pi alternatives · AI Assistants

Open-source alternatives to Pi

Pi is not described as open source on its own site. 16 of the 87 other AI assistants in this directory are open source, according to their own sites.

Pi is free to use. All of them are free or have a free plan.

16 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

The 12 closest to Pi

  1. DeepSeek

    Free AI chat assistant built on DeepSeek's openly released models

    • DeepSeek is free. Pi is free.
    • Only DeepSeek lists macOS and Windows apps.
    • DeepSeek is open source, according to its own site.
    • DeepSeek also covers AI search and AI agents.
    DeepSeek pricing and details

  2. Lumo

    Proton's private AI assistant with zero-access encrypted chats

    • Lumo starts at $9.99 per month, billed yearly ($119.88), or $12.99 billed monthly. Pi is free.
    • Lumo is open source, according to its own site.
    • Lumo also covers AI search.
    • Pi also covers natural-language input.
    Lumo pricing and details

  3. HuggingChat

    Hugging Face's open-source chat app for open AI models

    • HuggingChat starts at $9 per month (Hugging Face PRO). Pi is free.
    • Only Pi lists iOS and Android apps.
    • HuggingChat is open source and self-hostable, according to its own site.
    • HuggingChat also covers AI search and AI agents.
    HuggingChat pricing and details

  4. Jan

    Open-source desktop app for running local and cloud AI models

    • Jan is free. Pi is free.
    • Only Jan lists macOS, Windows and Linux apps.
    • Only Pi lists a web app.
    • Only Pi lists iOS and Android apps.
    Jan pricing and details

  5. AnythingLLM

    Open-source AI app for documents, agents and local models

    • AnythingLLM starts at $50 per month (Basic hosted cloud instance). Pi is free.
    • Only AnythingLLM lists macOS, Windows and Linux apps.
    • Only Pi lists an iOS app.
    • AnythingLLM is open source and self-hostable, according to its own site.
    AnythingLLM pricing and details

  6. LibreChat

    Open-source, self-hosted chat interface for many AI providers

    • LibreChat is free. Pi is free.
    • Only Pi lists iOS and Android apps.
    • LibreChat is open source and self-hostable, according to its own site.
    • LibreChat also covers AI search and AI agents.
    LibreChat pricing and details

  7. Cherry Studio

    Open-source desktop AI client for 50+ model providers

    • Only Cherry Studio lists macOS, Windows and Linux apps.
    • Only Pi lists a web app.
    • Cherry Studio is open source, according to its own site.
    • Cherry Studio also covers AI agents.
    Cherry Studio pricing and details

  8. Chatbox

    AI chat client for your own API keys or a hosted model plan

    • Chatbox starts at $3.50 per month, billed annually ($3.99 billed monthly). Pi is free.
    • Only Chatbox lists macOS, Windows and Linux apps.
    • Chatbox is open source, according to its own site.
    • Chatbox also covers AI search and AI agents.
    Chatbox pricing and details

  9. Big-AGI

    Multi-model AI workspace that compares and merges answers

    • Big-AGI starts at $9 per month, billed yearly ($108), or $10.99 billed monthly (Pro). Pi is free.
    • Only Pi lists iOS and Android apps.
    • Big-AGI is open source and self-hostable, according to its own site.
    • Pi also covers natural-language input.
    Big-AGI pricing and details

  10. NextChat

    Lightweight open-source AI chat client you can self-deploy

    • Only NextChat lists macOS, Windows and Linux apps.
    • Only Pi lists an Android app.
    • NextChat is open source and self-hostable, according to its own site.
    • Pi also covers natural-language input.
    NextChat pricing and details

  11. PocketPal AI

    Open-source app for running AI models offline on phones and tablets

    • PocketPal AI starts at $0.99 per premium Pal, one-time (US App Store in-app purchase). Pi is free.
    • Only Pi lists a web app.
    • PocketPal AI is open source, according to its own site.
    • Pi also covers natural-language input.
    PocketPal AI pricing and details

  12. PyGPT

    Open-source desktop AI assistant with agents, RAG and local models

    • PyGPT is free. Pi is free.
    • Only PyGPT lists Windows, Linux and macOS apps.
    • Only Pi lists a web app.
    • Only Pi lists iOS and Android apps.
    PyGPT pricing and details

4 more that are open source

All 16 in one table

Common questions

Is there an open-source alternative to Pi?

Yes. DeepSeek, Lumo, HuggingChat, Jan, AnythingLLM, LibreChat, Cherry Studio, Chatbox and 8 more are open source, according to their own sites.

Is Pi open source?

Pi is not described as open source on its own site. The listing was checked on Oct 5, 2026 against the pages it cites.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Pi: the alternatives its listing names first, then the tools that share the most features with it.