How to send a DM to everyone who comments on your Instagram post

How comment-to-DM works on Instagram

You pick a post or reel and a keyword. When someone comments that word, they get a DM from you with the message you wrote — usually a link — and, if you like, a short public reply under their comment such as “Sent it to your DMs 📩”.

Instagram supports this officially. The DM is a private reply: a professional account may send one message to a person who commented on its post, within 7 days of the comment. If they answer, the conversation continues like any other DM.

• More comments. Asking people to comment a word gets far more comments than “link in bio”, and an active comment section helps a post look alive to new viewers.
• More clicks. A link in DMs is one tap away, at the moment the person asked for it.
• A conversation started. Every DM opens a chat you can follow up in.

Set it up in five minutes

1. Switch to a professional account if you have not already: Instagram settings, Account type and tools, Creator or Business. It is free.
2. Allow message access so DMs can be sent: Settings, Messages and story replies, Message controls, Connected tools, Allow access to messages.
3. Connect Instagram to ReviewReplier. You log in on Instagram’s own page and approve access — no password is shared.
4. Create an automation. Choose one post or every post, the keyword(s), the DM and up to ten public replies. One is picked at random each time, so your replies don’t all look the same.
5. Send it to earlier comments too if the post is already live. Anyone who commented in the last 7 days gets the DM, once.

DM examples that get clicks

Fill in the bracketed parts. {username} is replaced with the commenter’s username when the DM is sent.

Instagram’s rules for automated DMs

• One DM per comment, within 7 days. Older comments cannot get a private reply, and the same comment never gets two.
• A 24-hour window for conversations. After someone messages you, a business tool may reply for 24 hours. When it closes, you wait until they write again.
• Only people who reached out. No cold DMs to followers or strangers: every automated message answers a comment or a message.
• Short text. A DM can carry up to 1,000 bytes of text.
• Professional accounts only, with message access allowed in Instagram’s settings.

Keep your account safe

Creators are right to be careful: plenty of “Instagram bots” ask for your password, log in from a server and click around the app pretending to be you. That breaks Instagram’s terms and is the fastest way to a locked account. Before you connect any tool, check three things:

1. It never asks for your password. A tool on the official API sends you to Instagram’s own login page and shows exactly which permissions it wants.
2. It only messages people who reached out. Private replies to comments and answers to DMs — not mass DMs, follow/unfollow or auto-likes.
3. It slows itself down. When a reel goes viral, hundreds of DMs at once look like spam.

ReviewReplier uses Instagram’s official API (the Instagram API with Instagram Login). It sends each person an automation’s DM once, spreads messages out to at most 20 a minute per account, varies the public replies, and stops everything the moment you disconnect or remove the app in Instagram. Your sign-in is stored encrypted, and you can delete all the data we keep for your account from the app.

Reply to every comment in your voice

Comments that are not keywords still deserve an answer — replies keep the conversation going under your post. Tell ReviewReplier a little about yourself once (your links, your collab email, the questions fans keep asking) and it drafts a reply to each new comment the way you talk:

• Questions get an answer from the facts you gave it — never a made-up price, date or link.
• Praise gets a warm, short thank-you, not a copy-paste “Thanks ❤️”.
• Complaints always wait for you, whatever you choose.
• Spam and abuse — scam links, “promote your page” bots, hate — can be hidden automatically.

Choose Ask me first to approve each draft, or Automatic to let replies go out after a short, human-like delay.

Answer DMs automatically, hand over the important ones

The same “About you” powers DM answers: “price?”, “where do you buy that?”, “ye kitne ka hai?” — common questions get an answer straight away, and set answers can be tied to keywords such as “price”.

Some messages should never be answered by a bot. Brand deals, sponsorships, money, complaints and anything personal are handed to you with a notification instead of a reply. And when you answer a chat yourself — even from the Instagram app — the AI stays quiet in that chat for as long as you choose.

Mistakes that make automation look spammy

• Promising a link and sending a sales pitch. Send what you promised in the caption, first.
• The same public reply 300 times. Add a few variations — or skip the public reply on very busy posts.
• Hiding affiliate links. Say it is an affiliate link. It is the law in many countries and it builds trust.
• Forgetting old automations. Turn them off when the offer or the discount code ends.
• Ignoring the replies to your DMs. The DM starts a conversation; answer it within 24 hours or let the AI do it.

About Instagram

Instagram is a trademark of Meta Platforms, Inc. ReviewReplier is an independent app for Instagram and is not affiliated with, endorsed or sponsored by Instagram or Meta.