Boomerang
Gmail and Outlook add-on that schedules sends, brings back messages that get no reply, and checks drafts with its Respondable feature.
- Free plan or free tier
- Works with Gmail
- Works with Outlook
Gmail extension for reminders, scheduled sends, templates, private notes and simple follow-up sequences.
Not enough info yet on works with Outlook, mobile app, developer API. Check the tool's own site.
Listing written by MailOverload, checked 2026-11-03. Report a correction or request removal. Back to follow-ups and reminders.