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Comment-to-DM: how it works and how to set it up in 2 minutes

October 4, 2026 · 5 min read

“Comment GUIDE and I'll DM you the link” is one of the simplest ways to turn a post into conversations. Here's what happens behind the scenes, and how to set it up.

What happens, step by step

  • Someone comments your keyword on a post or Reel.
  • A short public reply appears under their comment, so others see you answer.
  • They get a private message from you, usually within seconds.
  • When they reply, they receive your link as a card with a button.

Before you start

  • Your Instagram account needs to be a Business or Creator account.
  • Pick one short, clear keyword per post: GUIDE, LINK, SHOP, MENU.
  • Say the keyword in your caption and on screen in the Reel.

Wording that works

Keep the first DM short and give a reason to reply, because Instagram only allows plain text there: “Hey! Here's the guide you asked for. Reply YES and it's yours.” Then make the link card say exactly what they get: “Your free guide ✨ · Get the guide”.

Tip: Ask a question in the first DM. A reply from them opens the 24-hour window, so you can send the link and any follow-up.

Good to know

  • Each comment can get one private reply, within 7 days of the comment.
  • Comments on old posts still work, as long as the comment itself is less than 7 days old.
  • Comments made during an Instagram Live can only be answered while the Live is running.

Set it up with DMFast

Connect your Instagram, pick a template (or start from scratch), choose the post and the keyword, and turn it on. The live phone preview shows exactly what your follower will see before anything goes out.

Sources

Try it on your own account

Free plan, no card needed. Set up in about two minutes.

Start free

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