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Web vs SigmaOS: catalog facts
Web	SigmaOS
Free Free to download and build from the published source.	Freemium A free tier is available. Heavier use moves to a paid subscription.
macOS	macOS
Native macOS interface Local AI page questions through MLX on the Mac	Tabs live in named workspaces with separate logins, and each one can be marked done or locked, which…
Requires Apple Silicon and macOS 26.5 or later Development preview with limited site compatibility testing	It is closed source, macOS-only, and the free tier is limited enough that regular use pushes you to…
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account 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 October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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