How to auto-DM a link from Instagram comments

When to use it

Use a comment-to-DM automation when a post, Reel, or launch asks people to comment a word like link, guide, shop, recipe, or list. The public comment creates intent. The DM gives them the link without making you reply by hand all day.

Steps

1. 1Connect a professional Instagram account under Settings → Integrations if you have not already.
2. 2Open Dashboard, then Automations.
3. 3Click New automation.
4. 4Choose Send link on keyword.
5. 5Select the Link people should receive when LinkStack asks for the destination.
6. 6In the workflow, choose the connected Instagram account and the post or Reel you want to watch.
7. 7Set the comment keyword, such as link, guide, or shop.
8. 8Review the DM and its Link button, then save the draft.
9. 9Use another Instagram account to leave a realistic test comment.
10. 10Publish the automation when the reply and tracked Link look right.

Keyword tips

• Use short words people can spell from memory.
• Add common variants like link, links, guide, list, code, price, and shop when they fit.
• Avoid one-letter triggers unless you want accidental sends.
• Do not require exact punctuation. People comment fast and weird.
• Use a specific keyword for giveaways or launches so normal comments do not trigger the flow.

DM tips

• Send the thing first. Save the long pitch for later.
• Use a Link so country routing, device behavior, and analytics stay attached.
• Keep the DM short enough to read without opening a wall of text.
• Use a button when the next action is a tap.
• Test the Link on mobile before sending traffic to it.

Keep earlier comments in context

Growth can retain unmatched public comments for up to 90 days and bring them into chat after the commenter becomes a contact. Configure Comment Memory under Settings → Integrations. If it is locked, Unlock with Growth opens the in-app upgrade prompt without navigating away.

When a post takes off

• LinkStack queues comment-triggered private replies per connected Instagram account instead of firing the full spike at Meta.
• The queue uses a conservative 600-per-hour pace with short burst headroom, below Meta's stated 750-per-hour private-reply limit.
• If Meta still returns a rate limit, LinkStack automatically requeues that reply with backoff.
• Queued replies appear as Pending in recent automation activity. They are not counted as sent until Instagram accepts them.
• A queued reply is skipped if its one-time seven-day private-reply window expires before delivery.