Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.
- Email Client
- Free • Open Source
- Mac
- Windows
- Linux
- Android
- BSD
- AppImageHub
- Snapcraft
- Flathub
- PortableApps.com
- F-Droid
- Haiku
- Homebrew
- Chocolatey
+8Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.
- WebMail Provider
- Freemium • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Tor
+6Experience robust security, multiple accounts, chat, and fast search with efficient Gmail email management in a streamlined interface.
- WebMail Provider
- Free • Proprietary
- Online
- Android
- iPhone
- Chrome OS
- Android Tablet
- iPad
- Google Chrome
- Android Wear
- Android TV
- Software as a Service (SaaS)
End-to-end encrypted app for email, calendar, and contacts, requiring no personal data, with open source code and quantum-resistant security.
- WebMail Provider
- Freemium • Open Source
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- iPad
- Flathub
- F-Droid
+6K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more.
- Email Client
- Free • Open Source
- Android
- Android Tablet
- F-Droid
+3Open-source client enhancing Thunderbird with more features and bug fixes. Offers security patches and multi-row descriptions like Outlook.
- Email Client
- Free • Open Source
- Mac
- Windows
- Linux
- Flathub
- Chocolatey
+10Manage emails, calendars, contacts, and tasks with an intuitive interface. Features smart inbox, file management, and third-party app integration.
- Email Client
- Paid • Proprietary
- Mac
- Windows
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Apple Watch
- Android Wear
+7An intelligent inbox that simplifies email management with AI scheduling, snippets, and automated email organization in a familiar and clean design.
- Email Client
- Freemium • Proprietary
- Online
- Gmail
- Mac
+2E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.
- Email Client
- Freemium • Proprietary
- Mac
- Windows
- Android
- iPhone
- iPad
- Apple Watch
+3eM Client is a full featured e-mail client with a modern and easy to use interface. eM Client also offers calendar, tasks, contacts, notes and chat.
- Email Client
- Freemium • Proprietary
- Mac
- Windows
- Android
+5Boost 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.
- Email Client
- Freemium • Open Source
- Mac
- Windows
- Linux
- Arch Linux
- Fedora
- Ubuntu
+1Geary is an email application built around conversations, for the GNOME 3 desktop.
- Email Client
- Free • Open Source
- Linux
- BSD
- Flathub
- GNOME
- Flatpak
There’s big news attached. The best way to manage email on a Mac, according to Apple.
- Email Client
- Free • Proprietary
- Mac
- iPhone
- iPad
- Online
- Apple Watch
Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used.
- WebMail Provider
- Paid • Proprietary
- Online
+10Manage emails, integrate apps, and personalize your workspace with AI-powered drafting, centralized management, and customizable features for efficient workflows.
- Email Client
- Freemium • Proprietary
- Mac
- Windows
+5