Software
We've compiled a list of 74 free and paid alternatives to Thunderbird. The primary competitors include Microsoft Office Outlook, Mailbird. In addition to these, users also draw comparisons between Thunderbird and K-9 Mail, Apple Mail, eM Client. Also you can look at other similar options here: Office and Productivity Software.
We've compiled a list of 74 free and paid alternatives to Thunderbird. The primary competitors include Microsoft Office Outlook, Mailbird. In addition to these, users also draw comparisons between Thunderbird and K-9 Mail, Apple Mail, eM Client. Also you can look at other similar options here: Office and Productivity Software.
354
Part of the Microsoft Office Suite, Outlook is a personal information manager that lets you manage your e-mail, calendar, contacts, and tasks.
281
Mailbird is more than just another email client - It's an all-in-one communication platform for...
234
K-9 is an open source email client for Android with multi-folder sync, email signatures...
223
210
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.
194
The SeaMonkey project is a community effort to develop the SeaMonkey all-in-one internet...
165
Evolution is the official personal information manager and workgroup information management tool...
146
146
112
Free, open source and cross platform messaging and emailing app that combines common web...
1922
Software made to make email easier
Software made to make email easier
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
Add-ons
Open source software
Protected by Password
Support for Themes
Tabbed interface
SMTP integration
Secure File Sharing
POP3 Support
Import feeds from OPML
Export to OPML
Open Source apps
Multiple Account support
Integrated Password Manager
Support for IMAP
HTML Compose
Import from Google Reader
Google Calendar integration
Gmail integration
Extensible by Plugins/Extensions
Delivery reports
Categories
Calendar integration
Built-in RSS reader
Built-in Calendar
Legacy addons support
Integrated Web Browser
Integrated Chat
Free API
Customizable
Portable
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