Compare software

Mailspring vs MailMate: catalog facts
Mailspring	MailMate
Freemium The client is free and open source. Mailspring Pro is a monthly subscription that adds…	Freemium Uses a license key model, and the developer describes a Free Mode.
Windows, macOS, Linux	macOS
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	Extensive keyboard control Markdown email composition
Read receipts and link tracking are paid, and are tracking features Electron, so still heavier than a native client	macOS only Current 2.0 version is still a beta
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account 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 23, 2026

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