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Sashfold vs Zervo: catalog facts
Sashfold	Zervo
Free Free and open source under the BSD-2-Clause licence.	Free Free and open source under the MPL-2.0 licence.
Windows, macOS, Linux	Windows, macOS, Linux
Independent engine with no third-party code No telemetry, sponsored tiles, account or cloud AI	Uses Servo rather than Chromium or Gecko Sidebar workspaces with several layouts
Early stage, with incomplete web compatibility No self-updater	Some sites do not work because Servo is incomplete Linux and Windows builds are untested
Downloadable app	Downloadable app
Open source	Open source
License: BSD-2-Clause	License: MPL-2.0
No account needed	No 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 October 2, 2026

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