Instagram comment-to-DM
automation that runs itself
Set a keyword once. Every person who comments it gets your link, guide or offer in a private message — automatically, on Instagram's official API.
What is comment-to-DM automation?
Comment-to-DM automation turns your comment section into a delivery mechanism. You tell people to comment a word — LINK, GUIDE, PRICE — and a tool watches for it and sends each of them a DM with whatever you promised.
It works because it solves two problems at once. Instagram suppresses posts that push people off-platform, so a link in the caption costs you reach; comments, meanwhile, are a ranking signal that earns reach. Asking for a comment instead of a click gets you distribution and a private channel to everyone who responded.
How to set it up in three minutes
Connect your account
Sign in with Google, then connect an Instagram Business or Creator account through Instagram's own authorisation screen. No password is shared.
Choose a post and a keyword
Pick any post or reel, then set the trigger — match on exact word, whole word, or any comment containing your keyword.
Write the DM
A plain link, a tappable button card, or a file from Google Drive or Dropbox. Optionally require a follow before it is delivered.
They comment
Follow gate, then delivery
Trigger keywords: exact, contains, or whole-word
The match mode decides how much noise you let through.
Exact
The comment must be only your keyword. Cleanest, but misses "LINK please!" — which is most of the real comments.
Whole word
Matches LINK inside a sentence but not inside another word, so "blinking" will not trigger it. The sensible default.
Contains
Matches the keyword anywhere in the comment. Widest net, and the right choice when your keyword is distinctive enough to be unambiguous.
Pick a word tied to the offer — CHECKLIST, PRICING, AUDIT — rather than a generic "yes" or "info". Specific keywords pull people who actually want the thing.
Send links, buttons and files
Plain link
The simplest option, and the one that survives every Instagram client.
Button card
A tappable card with your own call-to-action label. Higher click-through than a bare URL.
Document
Deliver a PDF, guide or preset pack straight from Google Drive or Dropbox.
Follow to unlock
Ask for a follow first, then deliver. One comment becomes a follower and a lead.
Lead capture Pro
Every commenter becomes a contact you can export to CSV for your CRM or email tool.
Analytics
See which posts, reels and keywords actually produced DMs and leads.
Comment-to-DM on posts, Reels and Stories
Keyword rules run on comments left on regular posts and on Reels, and ReplySuit also handles Story replies. Reels are usually where this performs best, because they reach people who do not follow you yet — which is exactly the audience worth capturing.
You can also publish from ReplySuit: posts, Reels and Stories, with a scheduler on Pro. Most comment-to-DM tools do not publish, and most schedulers do not automate comments. Doing both in one place means the automation is attached to the post before it goes live.
Built on the official Instagram API
The private-reply endpoint
Instagram publishes an API specifically for answering a comment with a direct message. ReplySuit uses it. That is what separates this from the automation tools that get accounts restricted — those drive a hidden logged-in browser session and need your password.
Two hard limits, handled for you
Instagram permits one private reply per comment, and only within seven days of that comment being posted. ReplySuit enforces both, and queues against Meta's rate limits so a sudden spike in comments degrades gracefully instead of failing.
You stay in control
Disconnect an account whenever you like, and remove everything we hold from the data deletion page.
Frequently asked questions
What is comment-to-DM automation?
Comment-to-DM automation sends a direct message automatically to anyone who leaves a particular keyword in the comments of your Instagram post or reel. Instead of replying by hand, you set a rule once and every matching comment gets your link, offer or file in a private message.
How do I set up comment-to-DM on Instagram?
Connect your Instagram Business or Creator account to ReplySuit, pick the post or reel you want to automate, choose a trigger keyword such as LINK or GUIDE, and write the DM you want sent. The rule goes live immediately and applies to every new matching comment.
How fast does the DM arrive?
Usually within a few seconds. ReplySuit receives comments through Instagram's official webhook rather than polling, so a matching comment is queued for delivery the moment it is posted.
Can I require someone to follow me before sending the link?
Yes. Follow-gating sends a first message asking the commenter to follow you, then delivers the link once they have. It converts a comment into a follower and a lead rather than just a click.
Does comment-to-DM work on Reels?
Yes. Keyword rules apply to comments on both regular posts and Reels. Reels are usually where this works best, because they reach people who do not already follow you.
Is there a limit on how many comments can be answered?
Instagram allows one private reply per comment, within seven days of the comment. ReplySuit respects that automatically, along with Meta's rate limits, so a post with thousands of comments queues safely instead of failing.
Comparing tools? See ReplySuit vs ManyChat or the full pricing breakdown.