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Msty vs Osaurus: catalog facts
Msty	Osaurus
Freemium A free tier of the desktop workspace is available. Larger workspace features require a…	Free Free and open source; cloud models are billed by their providers through your own API…
Windows, macOS, Linux	macOS
It runs local models without a separate server install and keeps chats, prompt libraries and attached knowledge bases…	Native inference engine for Apple Silicon Mixes local models and bring-your-own-key cloud models per agent
The application is closed source, and the more capable workspace features sit behind a paid plan.	macOS only for now Cloud models need your own paid API keys
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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