Software Alternatives, Accelerators & Startups


Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA).

Sylpheed Alternatives

The best Sylpheed alternatives based on verified products, community votes, reviews and other factors.
Filter: 11 Open-Source Alternatives Latest update:

  1. 44

    Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

  2. 34

    Apps/Evolution - GNOME Wiki!

  3. The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder.

    Visit website paid $19.5 / Monthly (Pro)

    Visit website
  4. 28

    Claws Mail is an email client (and news reader), based on GTK+, featuring Quick response

  5. 29

    The Power Email App for busy professionals, like you.

  6. 29

    Mailspring is a mail client for Mac, Windows and Linux.

    Open Source

  7. 23

    Mailbird is the best email client for Windows 7, 8 and 10

  8. 27

    eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.


  9. 19

    There’s big news attached.

  10. 15

    Airmail is a lightweight and lightning fast mail client for Mac.

  11. 23

    Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

  12. 12

    Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.

  13. 15

    Geary is an email application built for GNOME 3.

  14. 14

    Secure email with absolutely no compromises. Get your free encrypted email account today.

    freemium €5.0 / Monthly (user - 5 GB)

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