I know cross-platform availability doesn’t matter much in an Email app. The comparison will be based on UI, Email Organization, Compose Mail, features, and apps integration. In this post, we shall compare Outlook Mail for Mac to the default Apple Mail app. That coupled with a bunch of other software integration in the Outlook for Mac app makes it a viable rival to the Apple Mail app. Recently, Microsoft revealed the brand-new look for Outlook for Mac, which is available through the Fast Insider group. That's why you can't help but look at a viable alternative from Microsoft's camp - Outlook for Mac.
However, Apple aims to offer a solid email experience with the Mail app on iOS, iPadOS, and macOS, but it still leaves a lot to be desired. Apple and Microsoft go toe-to-toe on several fronts like Word processing apps.