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Crest vs SigmaOS: catalog facts
Crest	SigmaOS
Free Free and open source under the MPL-2.0 licence.	Freemium A free tier is available. Heavier use moves to a paid subscription.
macOS, iOS	macOS
Spaces isolate cookies, history, tabs and credentials per context Chromium and WebKit engines on Mac with per-site rules	Tabs live in named workspaces with separate logins, and each one can be marked done or locked, which…
Early access software with no independent security audit Mac build is for Apple silicon only	It is closed source, macOS-only, and the free tier is limited enough that regular use pushes you to…
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	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 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.