Thunderbird Alternatives
Thunderbird
Thunderbird is a free, open source, cross-platform e-mail, news and instant messaging client. The project strategy is modeled after Mozilla Firefox.
It supports POP (storing mail locally on your hard drive so that it can be accessed without an internet connection), and IMAP. It features excellent mail filter capabilities and management.
Thunderbird has strong support for using multiple accounts and identities, including automated signature features.
Chat functionality is built in, so you can enjoy real-time conversation with your contacts, right from your favorite messaging application, with multiple supported networks. Thunderbird makes it easy to search through both past conversations and received emails.
Thunderbird can also function as an RSS/Atom feed reader, and has a large selection of add-ons that extend it with calendar support, PGP support, integration with online services and much more.
Available also as portable app: http://portableapps.com/apps/internet/thunderbird_portable
Best Open Source Thunderbird Alternatives
Want another awesome Thunderbird alternative? Look no further. We researched the top alternatives and found several new Thunderbird alternatives that work with your platform or device. If you want even more options, we've also reviewed top Thunderbird-like software for your Mac, Windows PC, Android phone/tablet, Linux computer, or iPhone.
K-9 Mail
FreeOpen SourceAndroidAndroid TabletF-DroidOpen source Android email client with support for multi-folder sync, keyboard shortcuts, and more.
Features:
- Ad-free
- Encryption
- Configurable
- Encrypted chat
- Exchange
- Header sorting
- Support for IMAP
- Multiple Account support
- One view multiple accounts
- PGP Encryption
- POP3 Support
- Privacy focused
SeaMonkey
FreeOpen SourceMacWindowsLinuxBSDPortableApps.comThe SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet application suite. A lighter alternative to...
Features:
- WYSIWYG Support
- Add-ons
- Built-in Download Manager
- Built-in RSS reader
- Customizable
- Firefox Extensions
- Lightweight
- Plugins
- Portable
- Security & Privacy
- Extensible by Plugins/Extensions
- Support for Firefox extensions
- Integrated Email Client
- Modular System
- Privacy focused
Evolution
FreeOpen SourceLinuxBSDS/MIMEGNOMEOpenPGPEvolution is a personal information management application that provides integrated mail, calendaring, address book and task list functionality.
Features:
- Calendar integration
- CalDAV
- Exchange
- Built-in RSS reader
- CardDAV
- Encrypted Email
- Integrated Spam Protection
- Multiple languages
- POP3 Support
- Reminders
- Support for WebDAV
Rambox
FreemiumOpen SourceMacWindowsLinuxFree, open source and cross platform messaging and emailing app that combines common web applications into one.
Features:
- Web application wrapper
- Multi-messenger
- Support for Multiple protocols
- Built-in themes
- Configurable
- JavaScript Rendering
- Multi Channel
- Multiple Account support
- Portable
- Publish on LinkedIn
- Skype integration
- Slack integration
- Telegram
Claws Mail
FreeOpen SourceWindowsLinuxBSDClaws Mail is an email client (and news reader), based on GTK+, featuring Quick response Graceful, and sophisticated interface Easy configuration...
Features:
- Lightweight
- Built-in RSS reader
- Content Filtering
- Customizable
- Extensible by Plugins/Extensions
- Support for IMAP
- Integrated Email Client
- Multiple languages
- Multiple Account support
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