Mailbird is described as 'Manage emails, integrate apps, and personalize your workspace with AI-powered drafting, centralized management, and customizable features for efficient workflows' and is a very popular Email Client in the office & productivity category. There are more than 50 alternatives to Mailbird for a variety of platforms, including Windows, Mac, Linux, iPhone and Android apps. The best Mailbird alternative is Thunderbird, which is both free and Open Source. Other great apps like Mailbird are Betterbird, Microsoft Outlook, Evolution and eM Client.
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.
Shift consolidates web applications into one platform, simplifying access to Google and Microsoft accounts. It declutters tabs, supports email management for Gmail and Outlook 365, integrates with extensions like Grammarly, LastPass, and more, while providing custom notifications and quiet hours.
The Bat! is a secure email client software, built to protect your correspondence against third-parties.
Mimestream combines your favorite Gmail features with the power of a native macOS app so you can move through your email effortlessly.
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.
Mail is designed to let you manage your email quickly and effortlessly. Its interface is based on conversations, so you can read an entire discussion without having to click from message to message.
The most powerful platform for email productivity in a beautiful native app — on desktop and mobile.
Unibox is a people centric email client that organizes your messages by person. It avoids having email like a to-do list.
aerc is an email client that runs in your terminal. It's highly efficient and extensible, perfect for the discerning hacker.
No-frills, easy to use, easy to maintain Email client for Android based on the JSON Meta Application Protocol (JMAP).
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Lacking Android, but Shift combines your various social media and email feeds into one inbox, rather than just being a unified launcher.