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Sider alternatives · AI Assistants

Open-source alternatives to Sider

Sider is not described as open source on its own site. 13 of the 71 other AI assistants in this directory are open source, according to their own sites.

Sider has a free plan. Paid plans start at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year. All of them are free or have a free plan.

13 tools · Listings checked up to Nov 9, 2026 · Where the facts come from

The 12 closest to Sider

  1. DeepSeek

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

    • DeepSeek is free. Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only DeepSeek lists a web app.
    • Only Sider lists a browser extension.
    • DeepSeek is open source, according to its own site.
    DeepSeek pricing and details

  2. HuggingChat

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

    • HuggingChat starts at $9 per month (Hugging Face PRO). Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only HuggingChat lists a web app.
    • Only Sider lists macOS, Windows, iOS and Android apps.
    • Only Sider lists a browser extension.
    HuggingChat pricing and details

  3. LibreChat

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

    • LibreChat is free. Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only LibreChat lists a web app.
    • Only Sider lists macOS, Windows, iOS and Android apps.
    • Only Sider lists a browser extension.
    LibreChat pricing and details

  4. 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). Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only Chatbox lists a web app.
    • Only Chatbox lists a Linux app.
    • Only Sider lists a browser extension.
    Chatbox pricing and details

  5. PyGPT

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

    • PyGPT is free. Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only PyGPT lists a Linux app.
    • Only Sider lists iOS and Android apps.
    • Only Sider lists a browser extension.
    PyGPT pricing and details

  6. 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. Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only Lumo lists a web app.
    • Only Sider lists macOS and Windows apps.
    • Only Sider lists a browser extension.
    Lumo pricing and details

  7. Jan

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

    • Jan is free. Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only Jan lists a Linux app.
    • Only Sider lists iOS and Android apps.
    • Only Sider lists a browser extension.
    Jan pricing and details

  8. AnythingLLM

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

    • AnythingLLM starts at $50 per month (Basic hosted cloud instance). Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only AnythingLLM lists a web app.
    • Only AnythingLLM lists a Linux app.
    • Only Sider lists an iOS app.
    AnythingLLM pricing and details

  9. Cherry Studio

    Open-source desktop AI client for 50+ model providers

    • Only Cherry Studio lists a Linux app.
    • Only Sider lists a browser extension.
    • Cherry Studio is open source, according to its own site.
    • Sider also covers AI search and grammar & style.
    Cherry Studio pricing and details

  10. Maple AI

    End-to-end encrypted AI chat that runs open models in enclaves

    • Maple AI starts at $20 per month (Pro). Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only Maple AI lists a web app.
    • Only Maple AI lists a Linux app.
    • Only Sider lists a browser extension.
    Maple AI pricing and details

  11. 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). Sider starts at $9.99 per month (Basic, US App Store); a mobile Pocket Plan is $49.99 per year.
    • Only Big-AGI lists a web app.
    • Only Sider lists macOS, Windows, iOS and Android apps.
    • Only Sider lists a browser extension.
    Big-AGI pricing and details

  12. NextChat

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

    • Only NextChat lists a web app.
    • Only NextChat lists a Linux app.
    • Only Sider lists an Android app.
    • Only Sider lists a browser extension.
    NextChat pricing and details

1 more that are open source

All 13 in one table

Common questions

Is there an open-source alternative to Sider?

Yes. DeepSeek, HuggingChat, LibreChat, Chatbox, PyGPT, Lumo, Jan, AnythingLLM and 5 more are open source, according to their own sites.

Is Sider open source?

Sider is not described as open source on its own site. The listing was checked on Nov 2, 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 9, 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 Sider: the alternatives its listing names first, then the tools that share the most features with it.