Polymail Alternatives

Airmail is a lightweight and lightning fast mail client for Mac.

Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues

Mailbird is the best email client for Windows 7, 8 and 10

eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.

freemium

Privacy-aware email app for Mac & iOS

The Power Email App for busy professionals, like you.

There’s big news attached.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.

Newton is a fully featured mail client available for Android, iOS, macOS and Windows.

Gmail is available across all your devices Android, iOS, and desktop devices. Sort, collaborate or call a friend without leaving your inbox.

The Nylas Cloud API powers your application with email, calendar & contacts features. Built-in features for better email, calendar, and contact management.

Outreach Is Your Sales Communication Platform