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Osaurus vs Witsy: catalog facts
Osaurus	Witsy
Free Free and open source; cloud models are billed by their providers through your own API…	Free The open-source software is available without a license fee. Hosting, hardware and…
macOS	Windows, macOS, Linux
Native inference engine for Apple Silicon Mixes local models and bring-your-own-key cloud models per agent	Works with local model servers as well as cloud APIs.
macOS only for now Cloud models need your own paid API keys	Cloud connections require your own provider credentials.
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: AGPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 22, 2026

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