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Open Source AI Chat Interfaces using Express

A curated collection of the best open source user interfaces for chatting with various AI models. using Express.

Chat with your documents using any LLM, fully private
  • Stars


    65,619
  • Last commit


    1 day ago
  • License


    MIT
A desktop and self-hostable AI app for chatting with documents, running local LLMs, and using AI agents without writing code or creating an account.

Open Source Alternative to:

Multi-model AI desktop client with local-first privacy
  • Stars


    51,436
  • Last commit


    6 hours ago
  • License


    AGPL-3.0
Desktop AI client for Windows, macOS, and Linux that connects 300+ models from 50+ providers, with local storage, a built-in knowledge base, and autonomous agent mode.

Open Source Alternative to:

One interface for all your AI models and conversations
  • Stars


    42,822
  • Last commit


    6 hours ago
  • License


    MIT
Chat with multiple AI providers through a single self-hostable interface, with support for custom agents, file uploads, plugins, and multi-user access control.

Open Source Alternative to:

Build AI copilots for your product in hours, not months
  • Stars


    37,204
  • Last commit


    5 hours ago
  • License


    MIT
Integrate production-ready AI copilots into any product quickly and easily with CopilotKit's open-source platform.

Open Source Alternative to:

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