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Chatbox vs OpenCat: catalog facts
Chatbox	OpenCat
Freemium The community edition is free and open source, and using it with your own API keys costs…	Freemium Free to download; check the App Store listing for paid features.
Windows, macOS, Linux	macOS, iOS
Works with OpenAI, Claude, Gemini, Grok, DeepSeek, Azure and local Ollama models from one window Conversations are stored locally rather than on someone else's server	Native app on Mac, iPhone and iPad Voice chat and image chat
You need your own API keys, and those cost money per use It is a client, so it cannot run a model itself without Ollama or similar	Apple platforms only Pricing details not stated on the homepage
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.