Compare software

FMail3MailMate
Free

Downloadable from the developer's site; the homepage does not list a price.

 Freemium

Uses a license key model, and the developer describes a Free Mode.

macOS macOS
  • Native macOS windows and tabs with session restore
  • Not built on Electron
  • Extensive keyboard control
  • Markdown email composition
  • Works only with Fastmail accounts
  • Unofficial and not made by Fastmail
  • macOS only
  • Current 2.0 version is still a beta
Downloadable app Downloadable app
Closed source Closed source
License not stated License not stated
Account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked September 23, 2026

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