Chatbot UI
Open-source unified chat interface for 80+ frontier AI models.
Pick Chatbot UI if you want one open-source frontend to talk to every major LLM without paying per-seat for a closed SaaS chat app.
Skip it if you need enterprise SSO, audit logs, and SLA-backed support, or you just want a zero-setup consumer chat app.
Chatbot UI is a polished, open-source web app that gives you a single ChatGPT-style interface for talking to 80+ models from OpenAI, Anthropic, Google, Mistral, Meta, and others. Built by Mckay Wrigley (Takeoff AI), the project has racked up tens of thousands of GitHub stars and has become the de facto reference implementation for self-hosted multi-model chat UIs.
The hosted version at chatbotui.com lets you sign up and start chatting across providers without juggling separate accounts, while the open-source repo lets engineering teams fork the codebase, plug in their own API keys, and run it on their own infrastructure. It's aimed at developers, prosumers, and small teams who want one place to compare models, manage prompt libraries, and avoid vendor lock-in. Pricing on the hosted product is lightweight (a free tier plus paid plans), but most serious users self-host and pay only for the underlying model API calls.
The ecosystem includes workspace features, model-switching mid-conversation, prompt and assistant management, and file-upload support. The main caveats: the hosted app is less feature-rich than tools like OpenRouter Chat or TypingMind, and the self-hosted route requires comfort with Supabase, Docker, and provider API keys.
The original and still the cleanest open-source multi-model chat UI. We recommend it as the default starting point for any team that wants a self-hosted ChatGPT alternative without reinventing the wheel. The hosted version is fine for casual use, but the real value is in forking the repo.
— The AI Tool Bible editorial team
Pros
- ✅ One interface for 80+ models across every major provider
- ✅ Fully open-source and self-hostable with a permissive license
- ✅ Clean, ChatGPT-familiar UX with prompt and workspace management
- ✅ Huge community and active GitHub ecosystem (20k+ stars)
Cons
- ⚠️ Self-hosting needs Supabase, Docker, and provider API keys
- ⚠️ Hosted version is less feature-rich than paid competitors
- ⚠️ No native team SSO/admin tier comparable to enterprise tools
Use cases
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