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Msty vs Sidekick: catalog facts
Msty	Sidekick
Freemium A free tier of the desktop workspace is available. Larger workspace features require a…	Free Free to download from GitHub.
Windows, macOS, Linux	macOS
It runs local models without a separate server install and keeps chats, prompt libraries and attached knowledge bases…	Native macOS interface Answers using your own files, folders and websites
The application is closed source, and the more capable workspace features sit behind a paid plan.	macOS only Answer quality depends on the local model and your hardware
Downloadable app	Downloadable app
Closed source	Closed 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.