Compare software

Shift vs Zen Browser: catalog facts
Shift	Zen Browser
Freemium A limited free tier is available. More accounts and spaces require a paid subscription.	Free Free and open source, funded by donations.
Windows, macOS, Linux	Windows, macOS, Linux
Several accounts of the same service signed in at once, separated by space	Vertical tabs, workspaces and split view built in, no extensions needed Firefox engine, so Firefox extensions and containers work
Most spaces and account slots require a paid plan Closed source and memory-hungry	Young project; interface changes between releases and bugs surface A small team maintaining a Firefox fork is a real long-term risk
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MPL-2.0
Account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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