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Zervo vs Vivaldi: catalog facts
Zervo	Vivaldi
Free Free and open source under the MPL-2.0 licence.	Free Free, funded by default search engine and bookmark placement deals.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS
Uses Servo rather than Chromium or Gecko Sidebar workspaces with several layouts	Tab stacking, tiling and vertical tabs without a single extension Built-in mail, calendar and feed reader in a side panel
Some sites do not work because Servo is incomplete Linux and Windows builds are untested	Not open source; only the modified Chromium parts are published The sheer number of settings takes real time to work through
Downloadable app	Downloadable app
Open source	Closed source
License: MPL-2.0	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 21, 2026

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