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SigmaOS vs Shift: catalog facts
SigmaOS	Shift
Freemium A free tier is available. Heavier use moves to a paid subscription.	Freemium A limited free tier is available. More accounts and spaces require a paid subscription.
macOS	Windows, macOS, Linux
Tabs live in named workspaces with separate logins, and each one can be marked done or locked, which…	Several accounts of the same service signed in at once, separated by space
It is closed source, macOS-only, and the free tier is limited enough that regular use pushes you to…	Most spaces and account slots require a paid plan Closed source and memory-hungry
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account 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.