Open Source AI Chat Interfaces using CSS
A curated collection of the best open source user interfaces for chatting with various AI models. using CSS.
Structured control layer for customer-facing AI agents
Stars
18,307Last commit
6 hours agoLicense
Apache-2.0
A conversational AI server that manages agent behavior through context-aware guidelines, keeping responses consistent, auditable, and aligned at scale.
Open Source Alternative to:
Private AI chat with zero-access encryption
Stars
5,642Last commit
10 hours agoLicense
GPL-3.0
AI chat assistant from Proton that stores conversations with zero-access encryption, never logs chats, and never uses your data to train models.
Open Source Alternative to:
One interface for every AI model you run or connect
Stars
156,230Last commit
24 hours agoLicense
BSD-3-Clause
Self-hosted AI platform that connects local and cloud models, extends with Python, and keeps your data under your control.
Open Source Alternative to:
Manage, build, and run AI agent teams around the clock
Stars
83,352Last commit
6 hours agoLicense
Unknown
A collaborative platform to create, schedule, and operate AI agents that handle long-running tasks, team workflows, and automated jobs without constant oversight.
Open Source Alternative to:
Chat with your documents using any LLM, fully private
Stars
67,343Last commit
13 hours agoLicense
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
52,780Last commit
6 hours agoLicense
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
Stars growing over the last 30 days46,041Last commit
6 hours agoLicense
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:
Run AI models locally or connect to cloud, privately
Stars
45,019Last commit
6 hours agoLicense
Apache-2.0
Jan runs open-source AI models on your own hardware or connects to cloud providers like OpenAI, Anthropic, and Google, keeping your conversations off third-party servers.
Open Source Alternative to:
Build AI copilots for your product in hours, not months
Stars
38,131Last commit
6 hours agoLicense
MIT
Integrate production-ready AI copilots into any product quickly and easily with CopilotKit's open-source platform.
Open Source Alternative to:
Create powerful chatbots without coding
Stars
10,561Last commit
1 day agoLicense
Unknown
Design, build, and deploy interactive chatbots with a visual editor. Integrate easily and collect data effortlessly.
Open Source Alternative to:
AI-powered answer engine with dynamic interface generation
Stars
9,181Last commit
12 hours agoLicense
Apache-2.0
Open-source answer engine that dynamically generates UI components while providing AI-powered responses, combining conversational AI with interactive interfaces.
Open Source Alternative to:
Smart desktop AI assistant with powerful local knowledge features
Stars
5,372Last commit
1 month agoLicense
Unknown
Cross-platform desktop AI assistant supporting multiple providers, local knowledge base, and custom prompts. Integrates MCP protocol for enhanced AI tool capabilities.
Open Source Alternative to:
AI chat companion with versatile model support
Stars
1,534Last commit
10 months agoLicense
Apache-2.0
Open-source chat application that lets you interact with multiple AI models in one interface, offering flexible conversations and diverse capabilities.
Open Source Alternative to:
c15t – Open-source cookie banner, built for control and lightening fast modern web apps.
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