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SigmaOS vs Safari: catalog facts
SigmaOS	Safari
Freemium A free tier is available. Heavier use moves to a paid subscription.	Free Free to download and use. The software is closed source.
macOS	macOS
Tabs live in named workspaces with separate logins, and each one can be marked done or locked, which…	Intelligent Tracking Prevention, iCloud tab and password sync, and unusually low battery use come from being built for…
It is closed source, macOS-only, and the free tier is limited enough that regular use pushes you to…	It is proprietary and Apple-only, and its WebKit engine lags on some web platform features that Chromium ships…
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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