Gbox is the best Mac client for Inbox. It's feature-rich, fast and reliable, with a sleek interface that fits OS X and looks familiar to Inbox users.

To the Gmail users who haven't tried Inbox yet: you CAN use this app, but you'll need to activate Inbox by logging in with your Gmail account on the official mobile app of Inbox by Gmail. It'll take a minute.

Gbox key features:
* Sleek and responsive interface
* Multiple accounts support
* Works with any Gmail account (after free activation via the official mobile app)
* Native OS X notifications
* Dock icon badge
* Menubar icon, colored blue to indicate new unread emails
* OS X shortcuts support, like Cmd+N to compose new messages or Cmd+F to search
* Drafts sync, start writing on Gbox e continue on mobile or web
* Sleek Dark theme (enable it in Window - Dark Theme)
* Reader Mode, for an awesome reading experience
* Hide attachments preview to make your Inbox cleaner
* Bundles, Snooze, Reminders and all the other Inbox great features
* Secure, lightweight, Retina ready and built for El Capitan
* Regular free updates