Airmail vs Mailspring

Airmail has a very clean and modern interface. On the left side of the screen are the folders (inbox, starred, draft, sent, snooze, trash) and on the right side the email threads for the folder currently being viewed.

If you are using Airmail in different devices (either MacOS or iOS), you can automatically sync settings through iCloud.

Even though there's a huge amount of settings available, it's quite easy to get used to each of them and the setup process is very fast and easy.

Airmail is available for both iOS and Mac, for people who use Apple's mobile devices. And the interface between both platforms is quite consistent, making it easy to seamlessly jump between one and another.

Airmail can integrate with multiple Cloud services for syncing, creating backups, adding tasks and more. Some of these services include Dropbox, Box, Fantastical, 2DO, Todoist, Wunderlist etc.

VIP folders are for particular senders which you always want to read even when you are ignoring email. The way it works is that you add different senders as VIPs and emails from those senders will always be surfaced on top of everything else.

Instead of forcing the user to work with their email the way Airmail developers would want, it allows the user to customize and make the email client work the way they want because of the sheer flexibility of the application.

There's a lot of settings available in Airmail with which you can customize almost every aspect and functionality of the app. In fact, it's very easy to get lost in them and spend a lot of time tweaking and customizing everything to your liking.

There are multiple ways to sort emails with Airmail. You can sort by unread, starred, attachments, conversations, dates, and many more criteria. You can even combine different criteria together.

Using these filters makes it extremely easy to quickly find any email you are looking for.

Airmail allows users to snooze an email until a defined moment (a few hours later, tomorrow, next weekend, next week, etc.), allowing you to process every email immediately and to always keep the inbox clean.

Airmail is able to use trackpad gestures for achieving and deleting mail items.

Mailspring has great integration with gmail features and tags.

The UI is very well designed and neat.

Activity tracking is built into Mailspring so you get notified as soon as contacts read your messages and can follow up appropriately.

Mailspring uses a C++ sync engine designed to be as efficient as possible, so you can leave the app running and not see your laptop battery life drain away.

Using a single inbox for all of your email accounts helps you get more done in less time. Mailspring supports every major mail provider—Gmail, iCloud, Office 365, Outlook.com, Yahoo!, and IMAP/SMTP—so you have a single, streamlined command center for all your messages.

You can swipe to archive / snooze messages and specify when you'd like them to resurface in your inbox.

Only in the paid version though.