Boomerang (cold)

Boomerang for Gmail is a Chrome and Firefox extension that lets users schedule sending and receiving emails. It works with Microsoft Outlook, Gmail, and Google Workspace accounts. The tool offers automatic follow-ups where if the recipient replies, Boomerang detects the response and does not send the follow-up; if they don't reply, it sends the follow-up automatically. The platform includes email read receipts, open tracking, and click tracking.