Overview
Boomerang for Gmail adds email timing and inbox controls to Gmail and Google Workspace. Users can schedule messages, return emails to the inbox later, request reminders when a recipient does not reply, and send conditional follow-up messages. It also includes recurring messages, read receipts, inbox pause, and meeting scheduling tools. Boomerang's Respondable feature uses AI to give real-time guidance while composing, with feedback about message effectiveness, tone, and likely response behavior. The service is proprietary and delivered through browser extensions and related mobile or scheduling products rather than as an open-source mail client.