← QuillReply

Comparison

QuillReply vs FollowUpThen

FollowUpThen deserves respect: it pioneered the email reminder, works with any mail client, and its address trick (send a note to 3days@followupthen.com and it comes back in three days) is genuinely clever. If you live across many email apps, that universality is hard to beat.

The short version

FollowUpThen works by putting its server in your email. You address, copy, or forward messages to its time-coded addresses, which means the content of those emails is sent to and held by their service so it can come back to you later. Nothing wrong with that design; it is how the trick works.

QuillReply takes the opposite approach for Gmail specifically. The reminder is a button on the email you are already reading or writing, the "did they reply" check runs inside your own browser, and the follow-up lands in your task manager rather than back in your inbox. No addresses to remember, no bot copied into your correspondence, and nothing sent anywhere unless you click.

Side by side

	QuillReply	FollowUpThen
How you set a reminder	Buttons inside Gmail: on the open email, the inbox row, or next to Send	Address an email to a time-coded address (3days@, tuesday8am@)
Works outside Gmail	Gmail only, in Chrome	Any email client, any platform
Where your email content goes	Nowhere unless you click; reply checks run in your browser	Emails you address to it are held on their servers to send back
Only if they have not replied	Yes, standard; out-of-office does not count as a reply	Response detection available on paid plans
Where the reminder lands	Your task manager: Apple Reminders, Google Tasks, Obsidian, Things 3	Back in your inbox as email (SMS on paid plans)
AI drafting in your voice	Yes; corrections stick between drafts	None
Price	Free during beta; simple pricing at launch	Free tier (around 50 active follow-ups); paid from about $4 per month

Where FollowUpThen is stronger

Universality. It works from any mail app on any device, with nothing installed. If you split your life across Outlook, Apple Mail, and a work Gmail, its address trick follows you everywhere, and QuillReply, a Chrome extension for Gmail, does not.

Where QuillReply is different

• No bot in your email. Reminders are set with a click, not by adding a third-party address to your correspondence. There is no syntax to remember and no service holding a copy of the thread.
• The reminder is a task, not more email. An inbox reminder about your inbox is a loop. QuillReply files the follow-up where your other obligations already live, with a suggested title and the due date read from the email itself.
• It helps you write the chase. When the follow-up fires, one click drafts the nudge in your own voice. FollowUpThen tells you it is time; QuillReply also hands you the words.

Comparison reflects FollowUpThen's published site and pricing as of August 2026; features and prices change, so confirm details on their site. FollowUpThen is a trademark of its owner. Gmail™ is a trademark of Google LLC. QuillReply is not affiliated with either. Corrections welcome: hello@quillreply.com.