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Crest vs Arc: catalog facts
Crest	Arc
Free Free and open source under the MPL-2.0 licence.	Free Free to download and use. The software is closed source.
macOS, iOS	Windows, macOS
Spaces isolate cookies, history, tabs and credentials per context Chromium and WebKit engines on Mac with per-site rules	Spaces keep work, personal and project browsing genuinely separate Split view and the command bar make keyboard-driven browsing fast
Early access software with no independent security audit Mac build is for Apple silicon only	The Browser Company has shifted its development focus to a newer browser, so Arc receives limited feature work No Linux build, and an account is required to use it
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	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 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.