Top pick
Cross-platform mail, calendar, and RSS client with extension support.
emailimapcalendar
Reliable mail clients with extension ecosystems and practical enterprise adoption.
Tools in this category (7)
Simple GNOME-aligned desktop mail client focused on conversation reading.
emailgnomegtkimap
Honorable mention
:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
definitive-opensource
CLI to manage emails
definitive-opensourcetui
Honorable mention
Monorepo hosting the proton web clients
definitive-opensource
Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.
definitive-opensource
Honorable mention
The world's best AI personal assistant for email. Open source app to help you reach inbox zero fast.
definitive-opensource