Wavebox works just like the WMail predecessor, allowing you to log in to your Gmail account and all the settings you can find in the web version, including shortcuts. The application also allows you to design an account as an Inbox, for example using Google design for personal email accounts and still keeping the Gmail web standard for work email.
What makes Wavebox stand out is the ability to integrate. While WMail only supports Gmail accounts, Wavebox supports all Google Apps services, Trello note apps, Slack chat apps, Microsoft Outlook accounts and even Office 365 apps. It can also load any any website on a separate tab is in the application and even edit the Google Docs file right in the application window.
Application setting options
Because of many features, it must be recognized that Wavebox is not an appropriate choice if you need a minimalistic application. At that time, Airmail or the Mailplane web application, brought a similar experience to Gmail and was quite light on a Mac application, probably a more reasonable choice. But when you need an email application that can be used for a variety of purposes, integrating with many other services, it's hard to have any more names than Wavebox.