Thunderbird

Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.

Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku

Extensible by Plugins/Extensions Built-in RSS reader Built-in Calendar Calendar integration ... Categories Customizable Extensible by Plugins/Extensions Free API Gmail integration Google Calendar integration Import from Google Reader Support for IMAP Integrated Chat Integrated Password Manager Integrated Web Browser IOS support Legacy addons support Multiple Account support Export to OPML Import feeds from OPML POP3 Support Portable Secure file sharing SMTP integration Tabbed interface Support for Themes Add a feature

1779 Like

Microsoft Office Outlook

Part of the Microsoft Office Suite, Outlook is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.

Freemium $ $ $ Mac Windows Web Android iPhone ... Android Tablet Windows Phone iPad Apple Watch Android Wear

Box.com integration Built-in Calendar Calendar integration Dark theme ... Dropbox integration Email scheduling Exchange Integration Flight Status Gmail integration ICloud Integration Integrated Search Multiple Account support Office 365 integration Onedrive integration Organize mails Shared calendars Signature with image Unified inbox Yahoo Integration Add a feature

314 Like

eM Client

eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts and chat.

Freemium Windows

Calendar integration Automatic Backup Built-in themes Built-in translation ... CalDAV CardDAV Cloud sync Combined Inbox Sync Contacts Dark theme Email preview Encrypted email Sync with Google Calendar Support for IMAP Imports email from Live mail POP3 Support Sync Calendars Threaded Conversations Add a feature

179 Like

Mailbird

Mailbird is more than just another email client - It's an all-in-one communication platform for email, contacts, calendar, apps, task management, video meetings and...

Freemium $ $ $ Windows

Undo send Asana integration Sync Contacts Dropbox integration ... Facebook integration GSuite Integration Multiple Account support Organize mails Slack integration Threaded Conversations Trello integration Twitter integration Unified inbox Add a feature

270 Like

Postbox

Postbox is an email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power...

Commercial Mac Windows

Multiple Account support Box.com integration Built-in RSS reader Dropbox integration ... Extensible by Plugins/Extensions Support for IMAP Multiple languages Onedrive integration POP3 Support Tabbed interface Visual Programming Add a feature

131 Like

Mailspring

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...

Freemium $ $ $ Open Source Mac Windows Linux Arch Linux Fedora ... Ubuntu

Dark theme Multiple Account support Email tracking Sync Contacts ... Customizable Drag n drop Email Analytics Email tracking & analytics Extensible by Plugins/Extensions Support for IMAP Support for Themes Threaded Conversations Unified inbox Add a feature

29 Like

Mutt

Mutt is a small but very powerful text-based mail client for Unix operating systems. Some of its features are: color support, message threading, MIME support (including...

Free Open Source Mac Windows Linux Xfce

Command line interface Support for IMAP POP3 Support S/MIME support Add a feature

51 Like

Sylpheed

Sylpheed is a simple, lightweight but featureful, and easy-to-use e-mail client (mailer, MUA). Sylpheed runs on many systems such as Windows, Linux, BSD, Mac OS X and...

Free Open Source Mac Windows Linux BSD PortableApps.com

Lightweight Add a feature

51 Like

Kontact - KMail

KMail is the email component of Kontact, the integrated personal information manager of KDE. Kontact is a personal information manager and groupware software suite for...

Free Open Source Mac Windows Linux BSD

No features added Add a feature

32 Like

Microsoft Mail and Calendar

Windows 10 has Mail and Calendar apps already built in. With the Mail application you can now easily see all message from your...

Free Windows Windows S

Email tracking Bundled with Windows Add a feature

20 Like

The Bat

The Bat! is a secure email client software, built to protect your correspondence against third-parties. .

Commercial Windows S/MIME OpenPGP

Built-in RSS reader Support for IMAP POP3 Support Portable Add a feature

46 Like

Zimbra Desktop

The free Zimbra Desktop client allows you to meld the online and offline worlds – storing and synching your email, calendar, contacts, files and documents in the cloud...

Free Personal Mac Windows Linux

No features added Add a feature

29 Like

Kontact

Kontact is the integrated Personal Information Manager of KDE. Kontact suite unites mature and proven KDE PIM applications under one roof. Thanks to the powerful...

Free Open Source Windows Linux

Convert Email to Task Add a feature

25 Like

Kiwi for Gmail

Dedicated Gmail client with clean integration of Google Calendar, Contacts, Google Drive, and Google Docs, Sheets, and Slides.

Freemium $ $ $ Mac Windows

GSuite Integration Multiple Account support Add a feature

9 Like

Do you think these apps are alternatives?

• Shift

  Shift is an email client that makes navigating between Mail, Calendar, Drive + your favorite Apps & Extensions easy (for Gmail, Outlook.com - Office 365 & Hotmail). .

  boomerang cross-account-search electron email-client extensions

  

  YES NO