Backdoor
Follow up three times, in the same thread, 3, 4 and 5 days apart, and add something new each time. Stop after the third, or the moment the founder replies, even if the reply is a no.
Most people send one email, hear nothing, and give up. That leaves a lot of replies on the table. In Backdoor's data, 3 in 10 founder replies came after a follow-up. Those people would have heard nothing if they had stopped at the first email.
Why follow-ups work
A founder at a small startup gets more email than they can answer. Your first email might arrive during an investor meeting, a launch, or a support fire. They read it, mean to reply, and it slides down the inbox. That's not a no. It's a busy week.
A follow-up brings your email back to the top at a different moment. If it also adds something new, it gives the founder a fresh reason to answer.
The cadence: 3, 4 and 5 days
This is the schedule Backdoor uses:
- First follow-up: 3 days after your first email.
- Second follow-up: 4 days after the first follow-up.
- Third follow-up: 5 days after the second.
That's about two weeks from first email to last follow-up. The gaps grow a little each time, so you stay present without crowding them. It also lines up with when replies come: across about 11,300 first emails Backdoor sent for 481 people, 9 in 10 people who heard back got their first founder reply within two weeks of their first email.
Why the same thread
Reply to your own email. Don't start a new one.
When you reply in the thread, the founder sees your follow-up with the original email right under it. They don't have to remember who you are or search for what you said. One glance gives them the whole context: your proof, why them, your ask.
A new thread with a new subject line looks like a second cold email. The founder has to connect it to the first one, and most won't bother.
What each follow-up says
The rule for all three: add something new. "Just bumping this" asks the founder to do work. A new fact, link or idea gives them something.
Follow-up 1: a short nudge with one new thing
Keep it to two or three lines. Restate the ask and add one small piece of value.
Made-up example. Person and startup are invented.
Hi Priya, following up on my note about Tallyfox's sync engine. I wrote up how we handled conflict resolution on flaky networks; it's linked below, in case it's useful even if you're not hiring. Still keen on a quick call if you have 15 minutes.
Arjun
Follow-up 2: new proof
Share something you did that you didn't mention the first time: a project, a result, a piece of work that fits what they're building.
Made-up example. Person and startup are invented.
Hi Priya, one more thing I should have mentioned: I also built the retry logic for our payments queue, which took failed charges from 2% to 0.3%. Feels close to what Tallyfox will need as you add invoicing. Happy to walk through it.
Arjun
Follow-up 3: a polite close
Say this is your last note, and make it easy to answer with one word. A clear last email often gets a reply that the others didn't, because it asks for so little.
Made-up example. Person and startup are invented.
Hi Priya, I'll leave it here so I'm not filling your inbox. If the timing is wrong now, a one-word "later" is fine and I'll check back in a few months. Either way, good luck with the launch.
Arjun
When to stop
Stop in two cases:
- After the third follow-up. Four emails with no answer is enough. More than that starts to hurt how the founder sees you.
- The moment they reply, whatever the reply says. A yes means you move to a call. A "not now" or a no means you thank them and stop the sequence. Don't follow up on a no. A short, gracious reply to a no is often what gets you remembered when they do hire.
If they say "later" or "check back in March", note it and write again then, as a new conversation that mentions the old one.
What silence usually means
Silence after the first email usually means busy. Silence after all four usually means the timing is wrong: they're not hiring for your role now, or they just filled it. It rarely means your email was bad, as long as it was short and specific.
Don't read silence as a verdict on you. Move on to the next startup, and keep going. Of the 28 people who kept Backdoor sending for three weeks or more, 17 heard back from a founder, about 6 in 10. See the full numbers.
What not to do
- Start a new thread. It strips the context and looks like spam.
- Guilt them. "I know you're busy but I've emailed three times" makes replying feel like an apology. Nobody wants to write that email.
- Attach your resume again. It's already in the thread if you sent it. Attaching it again adds weight, not information.
- Copy the first email. If the follow-up says nothing new, it's a bump.
- Spam them on LinkedIn. One connection request with a short note is fine. Messaging them on every channel at once is not.
- Follow up the next day. Give them a few days. A next-day nudge reads as impatient.
How to write the first email
A follow-up only works if the first email was worth coming back to. If you haven't sent yours yet, here's how to cold email a startup founder, with five example emails by role.
Let Backdoor follow up for you
Tracking follow-ups by hand is where most people slip. You need to remember who you wrote to, when, what you said, and whether they replied.
Backdoor does it for you. It writes the first email to founders that fit you, and once you approve it, sends it from your own Gmail. Then it sends three follow-ups in the same thread, 3, 4 and 5 days apart. Before each one it checks the thread, and it stops the moment the founder replies, or if you've written in the thread yourself.
If you're comparing ways to run follow-ups yourself, see how Backdoor compares with lemlist and Apollo.
