How to Auto-Reply to Instagram Comments With a DM

The mechanism is simple: you pick a post or reel, optionally set a keyword, and connect a DM (plus an optional public comment reply) to it. When someone comments — and matches your keyword, if you set one — they get messaged automatically. If they comment more than once, they still only get messaged once per automation, so your audience never feels spammed.

This only triggers off comments — not story mentions, not DMs you receive directly, not shares. If you want a different reaction to trigger a message, that's not something comment-to-DM automation covers.

Instagram's Graph API requires a Professional (Business or Creator) account, and it authenticates through Facebook Login rather than an Instagram-only login screen — that's a platform requirement, not a design choice any automation tool gets to skip. Once connected, confirm the connection shows as healthy before setting up your first automation.

Choose the post or reel you want to automate. You can leave the trigger open — any comment fires it — or set a keyword so only comments containing that word (like "PRICE" or "INFO") trigger a response. Keyword triggers tend to convert better, because the commenter has already told you what they want.

• Open trigger: good for giveaways or general engagement posts where you want to message everyone who comments
• Keyword trigger: good for posts where different comments mean different intents ("price" vs "size" vs just a heart emoji)

Every trigger sends a private DM, and can optionally post a public comment reply at the same time — so the commenter and your wider audience both see it land. Write the DM like you're actually replying to one person, not broadcasting to a list. Keep the public reply short; its job is just to show the thread is active, not to carry the whole message.

Every commenter who gets a DM becomes a tracked lead — you can see who's active versus who's opted out, and export the list. If a post's reply rate looks weak, that's usually a sign the DM copy doesn't match what the comment implied, not that automation itself isn't working.

• Using an open trigger on a high-traffic post — you'll message everyone, including people who commented just an emoji
• Writing a DM that sounds like a broadcast rather than a reply to what they actually said in the comment
• Forgetting that comment automations only fire once per commenter per automation — don't expect a second message to someone who already got one
• Not checking your Instagram connection status before a launch — an expired token means the automation silently stops firing