Wino is a lightweight native mail client for Windows 10/11. It is still in active development. Main motivation for this project is to replace Mail & Calendar for Windows with modern Windows design without using web technologies for speed.




Thunderbird is described as 'Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc' and is a leading Email Client in the office & productivity category. There are more than 50 alternatives to Thunderbird for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Thunderbird alternative is K-9 Mail, which is both free and Open Source. Other great apps like Thunderbird are Claws Mail, Evolution, Betterbird and SeaMonkey.
Wino is a lightweight native mail client for Windows 10/11. It is still in active development. Main motivation for this project is to replace Mail & Calendar for Windows with modern Windows design without using web technologies for speed.




Transform your email inbox into a collaborative workspace with Spike. Enjoy integrated chat-like emails, tasks, collaborative notes, and group projects. Seamlessly manage multiple accounts, organize priorities, and schedule meetings across devices.




Spike is the most popular SaaS alternative to Thunderbird.
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, yet having them locally accessible when on the road.




tried it over a few weeks, all you need for office users
This one goes beyond the features and qualities of Thunderbird which is the very reason I am looking for an alternative!

Most users think Zimbra Desktop is a great Thunderbird alternative.
Engineered for iOS, macOS, and watchOS, this fast mail client supports multiple account types, custom actions, Smart Inbox filtering, unified inbox, privacy mode, email scheduling, snooze, third-party app integration, flexible personalization, and advanced workflow tools.



Collaborative email and threaded group chat for productive teams. A single app for all your internal and external communication.




aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.


Foxmail is a free POP3 and IMAP4 e-mail client in English and Chinese for Windows systems.


The UI interface is greater, it has many great functions like notes, calendars, tags, etc. It could use POP, IMAP and Exchange accounts.

Most users think Foxmail is a great Thunderbird alternative.
Shortwave is an email app that takes the pain out of managing your inbox, making it effortless to stay organized, productive, and responsive.



LucaMail is an open source, cross-platform email client. LucaMail is developed to provide cross-platform alternative to Email Clients that are really exists. LucaMail focuses on modern technologies as well as maintaining a user-friendly UI.




The lack of POP support means this is useless for my purposes. Since Thunderbird DOES support POP this means LucaMail is NOT an alternative.

The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.



An enterprise application server that integrates information into a single workspace, integrates also a full mail server



Native onlye for Android, iOS, Windows and Mac, not a Linux app