Free & Open-Source Microsoft Outlook Alternatives

Email, calendar, and contacts client.

1. Thunderbird ↗ ★ PICKFOSSPRIVATE
   Mozilla's privacy-focused email client.
   ●○○Easy · Reads common file formats
2. Mailspring ↗
   Modern email client with snooze and templates.
   ●○○Easy · Reads common file formats
3. Betterbird ↗ FOSSPRIVATE
   Thunderbird fork with extra usability features.
   ●○○Easy · Reads common file formats