AI Chat Widget: 4 Open-Source Ways to Add Chat to Any Website
An AI chat widget turns any website into a Q&A bot. We compare chatbot-ui, LibreChat embed, Dify and FastGPT with real stars.
💡 What You Will Learn
An AI chat widget turns any website into a Q&A bot. We compare chatbot-ui, LibreChat embed, Dify and FastGPT with real stars.
📜 Table of Contents
You do not need a SaaS contract to add AI chat to your site. Four open-source routes cover everything from a weekend prototype to a multi-tenant product.
The Routes
chatbot-ui (33,331 stars) is the fastest prototype: fork, point at your API key, embed the iframe. LibreChat (41,704 stars) adds multi-user accounts and provider switching. Dify (151,459 stars) is the full platform route - visual RAG pipelines, model management and an embeddable chat widget. FastGPT (29,266 stars) is the Chinese-first alternative with strong document QA.
Which One Fits
Personal blog or docs: chatbot-ui. Team tool with accounts: LibreChat. Business site with knowledge base: Dify. Chinese-language users: FastGPT. All four let you bring your own model, so costs stay proportional to real usage.
Comparison
| Tool | Best For | Stars |
|---|---|---|
| chatbot-ui | Quick embed | 33,331 |
| LibreChat | Multi-user | 41,704 |
| Dify | RAG platform | 151,459 |
| FastGPT | Doc QA | 29,266 |
FAQ
Q: Can I use a local model?
A: Yes - all four connect to Ollama or any OpenAI-compatible endpoint, keeping data on your server.
Q: How do I stop it answering random questions?
A: Give it a system prompt scoped to your content and enable the RAG mode with your own documents as the only source.
Written by our editorial team; tools listed here are tested or verified against public sources. Links point to official sites or GitHub repos for reference only โ no paid placements.
