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Wino Mail vs Betterbird: catalog facts
Wino Mail	Betterbird
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free and open source, funded by donations.
Windows	Windows, macOS, Linux
It deliberately rebuilds the simplicity of the old Windows Mail app with a Fluent interface, which the WebView-based…	Fixes and features Thunderbird has not shipped, listed openly in a comparison table Installs next to Thunderbird and runs on the same profile, so switching back is trivial
It is a one-developer project still filling in features, and it runs on Windows only.	A small volunteer project riding on someone else’s release train The Mac build ships in English only and needs a language pack for anything else
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 20, 2026

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