Zendio
ReadNotify
GetNotify
EmailTrackerPro
Intelliverse Email Tracker
DidTheyReadIt
Bananatag
ContactMonkey
Followup.cc
FollowUpThen
Gmelius
Right Inbox
Boomerang for Gmail
Onesheet CRM
Mailbutler
Rebump
Zendio Followup.ccBased on our record, Followup.cc seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I'll update this if I find more. For now, this seems to be a partial solution. It's a Gmail add on (except I don't use Gmail) that adds reminders. The options when setting reminders include cancelling it if someone replies, and to remind everyone in the thread. If you combine those two, it seems like — if you use Gmail's web client and have $23/month you're dying to get rid of — a decent way to add the feature. Source: over 1 year ago
ReadNotify - ReadNotify enables the user to know when email is sent and the reciever reads the email.
FollowUpThen - The simplest way to schedule an email reminder
GetNotify - GetNotify is a free email tracking software solution.
Gmelius - Gmelius is the first collaboration platform designed for G Suite and your company's daily tools.
EmailTrackerPro - EmailTrackerPro is an email tracking and spam filter solution.
Right Inbox - Schedule Emails in Gmail To Be Sent Later