The worst follow-up is the one that arrives four minutes after the last message, asking if they're still there. They are. They just hadn't answered yet. That message doesn't recover the lead — it tells them a machine is watching the clock.
One message, not a sequence
A single, well-timed nudge outperforms a five-step drip in every test we ran. The drip trains people to ignore you. One message, sent once, keeps the thread feeling like a conversation someone forgot to finish.
Send it between one and twenty-three hours after the last reply — long enough to read like a person circling back, short enough that the intent is still warm.
Skip anyone who answered
This is the part most setups miss. The follow-up should check, at send time, whether the person has replied since. If they have, it never sends. Nothing reads more robotic than a "just checking in" that lands under their answer.
Timing and suppression do the heavy lifting. The wording almost doesn't matter — keep it short, human, and about them.
Runs three setters at Studio Onze and writes down what breaks.