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Kai 9000 vs Open Hitomi: catalog facts
Kai 9000	Open Hitomi
Free Free and open source under Apache-2.0; cloud providers may charge for their own API keys.	Free Free and open source; AI chat uses your own API key.
Windows, macOS, Linux, Android, iOS, Web	Android
Works with many AI providers and falls back between them automatically Offline Gemma 4 models on Android and desktop	Floating overlay usable on top of other apps Bring-your-own-key chat
Cloud providers need your own API keys Background autonomy and shell access need careful configuration	Early-stage project with a small user base Chat requires an API key from a model provider
Downloadable app, Web application	Downloadable app
Open source	Open source
License: Apache-2.0	License: AGPL-3.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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