Alternativy k Nylas Mail Lives pro Web s licencí open source

• Web
  Všechny platformy Windows Mac Linux Chrome OS Android iPhone Apple Watch iPad Android Tablet Web Self-Hosted BSD Haiku PortableApps.com Slack F-Droid Ubuntu Ruby Gmail GNOME Arch Linux Fedora Cloudron Amazon Echo (Alexa Voice Service) OpenPGP PureOS (Purism) S/MIME
• Licence Open Source
  Jakákoli licence Bezplatná licence Licence Open Source Komerční licence