The one DM Meta allows per comment
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A private reply is the one direct message Meta lets a business send to someone who commented, up to 7 days after the comment. The Private reply step sends it with up to three buttons; their tap, or anything they type back, opens the chat and the rest of the flow runs. It is the heart of comment to DM.
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From a comment to a conversation
One reply per comment, where it lands, and the tap that opens the chat.
- 01
One DM per comment
Meta allows one private reply per comment, up to 7 days after it. This is that reply.
Meta: one message per comment, within 7 days
- 02
Inbox or Requests
On Instagram it lands in their inbox if they follow you, and in Requests if they don’t.
- 03
Their tap opens the chat
A tap on its button, or anything they type back, opens the chat, and the step you connect goes next.
Meta: nothing more until they respond, then 24 hours
- 04
Links ride in the reply
Add link buttons to the private reply itself, up to three buttons in all with the tap.
The reply, and Meta’s rules
What it carries, and the rules the builder keeps for you.
What it says
- Private replyThe first DM they receive
Up to 640 characters with a button or link, up to 1,000 on Instagram and 2,000 on Messenger without. Up to five ways to say it, one picked at random.
Meta: 640 above buttons
- ButtonThe tap button
“Their tap opens the chat and the step you connect goes next. Without a button, it goes on when they reply.”
- Link buttonsLinks in the reply
“Links in the private reply itself. Up to 3 buttons in all, the tap button included.” Every click is counted per person.
Meta: 3 buttons per message
- Proven on Instagram
A tap button inside an Instagram private reply was proven in a live test, and its tap opens the chat.
Meta’s rules it keeps
- One per comment
“Meta allows one private reply per comment, up to 7 days after it. Anything more waits for them to tap or reply.” The builder refuses a second private reply on the same path.
Meta: one message per comment
- Waits of up to 7 days
A delay before the private reply can last up to 7 days. Once the chat is open, a wait is up to 23 hours.
Meta: within 7 days of the comment
- Where it lands
On Instagram, in their inbox if they follow you, otherwise in Requests.
Meta: Inbox if following, else Requests
- Not to another Page
On Facebook a private reply cannot go to a comment written by another Page.
Meta: no private reply to a Page
The door to everything else
On a comment start, every message comes after the private reply’s tap.
The Private reply step, as you set it
The step selected on the canvas, its panel open with the text, the tap button and the link buttons.
- Button
- The tap that opens the chat.
- Link buttons
- Up to 3 buttons in all.
Every rule, and who sets it
Nearly all of them are Meta’s.
| What | The limit | Set by |
|---|---|---|
| Private replies per comment | One | |
| How late | Up to 7 days after the comment | |
| Text with a button or link | 640 characters | |
| Text without | 1,000 on Instagram, 2,000 on Messenger | |
| Buttons | 3 in all, the tap button included | |
| Ways to say it | 5 | CommentWatchDog |
| After it | Nothing more until they tap or reply, then 24 hours |
Meta’s rules are from the Private Replies references for Instagram and Messenger, checked against live sends on 2026-10-05.
Questions people ask
Short answers before you start.
A private reply is the one direct message Meta lets a business send to a person who commented on its post, reel or ad, up to 7 days after the comment. It lands in their DMs, shown as a reply to their comment.
One. Meta allows one private reply per comment, up to 7 days after it. Anything more waits for the person to tap a button or write back, which opens the chat for 24 hours.
Yes: a tap button that opens the chat and runs the next step, and link buttons, up to three buttons in all. A tap button in an Instagram private reply was proven in a live test.
In their inbox if they follow you, otherwise in their message requests. The follow to unlock check goes after it and can ask them to follow before the offer.
The chat is open for 24 hours from their tap, and the step you connect goes next: a message, a question, the follow check or a hand-off. Without a button, the flow goes on when they reply.
Yes. Private replies work on comments on Instagram and Facebook posts, reels and ads. On Facebook they cannot go to a comment written by another Page.