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Mailspring vs Wino Mail: catalog facts
Mailspring	Wino Mail
Freemium The client is free and open source. Mailspring Pro is a monthly subscription that adds…	Free The software is free under its open-source licence. Hosting, hardware and external…
Windows, macOS, Linux	Windows
Unified inbox, snooze, send later, rules and templates in the free tier C++ sync engine keeps memory and battery use down for an Electron app	It deliberately rebuilds the simplicity of the old Windows Mail app with a Fluent interface, which the WebView-based…
Read receipts and link tracking are paid, and are tracking features Electron, so still heavier than a native client	It is a one-developer project still filling in features, and it runs on Windows only.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 22, 2026

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