Open Source Nylas Mail Alternatives for Windows
Nylas Mail is not available for Windows but there are plenty of alternatives that runs on Windows with similar functionality. The most popular Windows alternative is 
Thunderbird, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Nylas Mail and 11 are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Nylas Mail are 
Microsoft Office Outlook (Paid), 
Mailspring (Freemium, Open Source), 
eM Client (Freemium) and 
Mailbird (Paid).
- Free email application that’s easy to set up and customize - and it’s loaded with great features!. View 85 alternatives to Thunderbird
- Free • Open Source
- Mac
- Windows
- Linux
- BSD
- PortableApps.com
- Haiku
ruvenssgwilches Nylas is SAS, Thunderbird is just a full email client - Boost your productivity and send better email with Mailspring, a beautiful, fast email client for Mac, Windows, and Linux. Mailspring is free to use and an optional pro version adds read receipts, send later, reminders and more. View 38 alternatives to Mailspring
- Freemium • Open Source
- Mac
- Windows
- Linux
- Arch Linux
- Fedora
- Ubuntu
lenakun It's a fork of the original client with some improved features and some resolved bugs. - Nylas Mail Lives is a fork of Nylas Mail. View 31 alternatives to Nylas Mail Lives
Discontinued
On its github page it states it is archived and is no longer maintained.
- Free • Open Source
- Mac
- Windows
- Linux
- Self-Hosted
lenakun It is a fork of Nylas Mail with more features and resolved bugs.