Chatbox AI

Chatbox AI is a free, open-source desktop and mobile client that gives you a single beautiful interface for talking to almost any large language model. It supports OpenAI (GPT-4o and successors), Anthropic Claude, Google Gemini, xAI Grok, DeepSeek, Groq, OpenRouter, Together, Perplexity, and local models running through Ollama and LM Studio — you provide the API key or point at a local endpoint, and Chatbox handles the rest. Features include multi-session tabs, prompt templates, image and file input, syntax-highlighted code blocks, Markdown export, and searchable local chat history. Because everything is stored on-device, no messages touch the Chatbox servers unless you enable optional cloud sync. Chatbox is available on macOS, Windows, Linux, iOS, Android, and via web, so you can start a conversation on your phone and continue on your laptop. The free tier is fully functional; a Pro tier adds cloud sync, higher rate limits on hosted models, and some quality-of-life features. It's a great pick for individuals who want one polished chat app instead of juggling ChatGPT, Claude.ai, and Gemini in three different browser tabs, and for teams that want a private, brand-safe chat client that doesn't tie them to a single provider.