Mailplane

Mailplane provides a native macOS interface for Gmail, allowing users to manage multiple Gmail, Calendar, and Contacts accounts without relying on a web browser. The application presents mail, calendar events, and contact information within a single window, using Apple‑style keyboard shortcuts and a menu‑bar notifier that displays unread counts and alerts for new messages. Users can archive or reply directly from the notifier, and the built‑in search can query across all linked Gmail accounts and labels.

The client includes tools for annotating messages with shapes and notes, and it supports extensions that add third‑party functionality with a single click. Integration points connect Mailplane to other macOS applications, while shared inbox and CRM features enable teams to collaborate on mailboxes and labels. The software is localized in six languages and runs on macOS 10.12 or later.