Sylpheed Alternatives (January 2026)

Sylpheed

Sylpheed - 軽快で使いやすいオープンソースのメールソフト

https://sylpheed.sraos.jp/

Sylpheed - Sylpheed はシンプル、軽量かつ高機能で使いやすい、無料のメールソフトです。Sylpheed は Windows から Linux まで様々なプラットフォームに対応しています。

3/5

1+ reviews

Reviewed on:

G2
1.
Mailspring - The best free email app
https://www.getmailsprin
.com/

Mailspring: The open-source, extensible email app for Mac, Linux, and Windows with open tracking, link click tracking, contacts enrichment data and more.

2.
Thunderbird — Free Your Inbox. — Thunderbird
https://www.thunderbir
.net/

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

3.
K-9 Mail
https://k9mai
.app/

K-9 Mail is an open source email client focused on making it easy to chew through large volumes of email

4.
Best free Email client Software for Businesses / Windows and MacOS - Mailtrim
https://www.mailtri
.com/

Mailtrim provides secure Free email client software with its unique team collaboration Feature and is designed to serve the mailing needs of all business

5.
Manage multiple accounts with the best email client 2024 | Mailbird
https://www.getmailbir
.com/

Email made easy and beautiful. Manage multiple accounts with the best email client for Windows 2024. Download the #1 email client program free Now.

6.
BlueMail - The Best Email App for Windows, Mac, Linux, Android and iOS
https://bluemai
.me/

BlueMail is a modern, mobile and desktop, powerful Email management tool with a sleek design, unified inbox and support for all your accounts: IMAP, Exchange,POP3.

7.
Email Client Software - Everdesk The Best Email Client for Windows 7 and 8
https://www.everdes
.com/

EverDesk combines the best features of an Email Client, File Manager, Address Book and Calendar into one integrated interface, making it the most unique and comprehensive personal information manager on the market

8.
Mantis Bug Tracker
https://www.mantisb
.org/

MantisBT is a popular free web-based bug tracking system. It is written in PHP works with MySQL, MS SQL, and PostgreSQL databases. MantisBT has been installed on Windows, Linux, Mac OS, OS/2, and others. It is released under the terms of the GNU General Public License (GPL).

9.
The GNU Privacy Guard
https://gnup
.org/

GnuPG is a free implementation of OpenPGP