If you are considering Thunderbird, you may also want to investigate similar alternatives or competitors to find the best solution. Other important factors to consider when researching alternatives to Thunderbird include communication and emails. The best overall Thunderbird alternative is Front. Other similar apps like Thunderbird are Spike, Mailbird, BlueMail, and Microsoft Outlook. Thunderbird alternatives can be found in Email Client Software but may also be in Help Desk Software or Business Instant Messaging Software.
Front takes out the pain of shared inboxes (contact@, team@, jobs@...) by introducing collaboration in email.
Spike focuses on the features that save you time. Unified inbox, team collaboration, real-time awareness & more in a single productivity app.
Email Client for Windows
Work efficiently with email, calendar, contacts, tasks, and more—together in one place. Office integration lets you share attachments right from OneDrive, access contacts, and view LinkedIn profiles.
Shift browser simplifies your online experience by ensuring all your apps, accounts, emails, and tools are intuitively accessible in one window. Eliminate the hassle of searching, opening, and logging into accounts, and effortlessly manage your digital life with ease and efficiency. Shift is the app-integrated power browser for everything you do online.
eM Client is a fully-featured email client with a modern and easy-to-use interface. eM Client also offers calendar, tasks, contacts and chat.
Zimbra Desktop is a free and open source email client application that gives you online and offline access to all your email accounts in one place. Zimbra Desktop works with many types of email systems to synchronize email, contacts and calendar data between users mailboxes in the cloud and local data stored on your computer disk.
Mailspring is a mail client for Mac, Windows and Linux.
K-9 is an opensource email client based on the Email application shipped with the initial release of Android. K-9 is focused on making it easy to chew through large volumes of email.