Auto-Reply Instagram Comments by Keyword (ManyChat)

If you post on Instagram and ask people to comment a word to get something —a catalog, a coupon, a link— you know what comes next: dozens of comments to answer by hand, one by one, before interest cools off. Auto-replying to Instagram comments by keyword solves exactly that: when someone comments the word you chose, the platform replies in public and sends them a DM instantly, and from there an AI agent keeps the conversation going. This guide compares that approach with ManyChat and walks you through setting it up, step by step.

Blind Agents' comment automation fires when someone comments a keyword on your post or reel. Two things happen at once:

• It replies publicly to the comment, so the person (and anyone reading) sees there is activity.
• It sends an automatic DM (private reply) with your opening message, opens a conversation in your inbox and hands the contact off ready for attention.

From there, nothing is left hanging: an AI agent continues the conversation in the mode you choose —automatic, copilot or manual—, answers questions, qualifies and books when needed.

If you are coming from ManyChat, the trigger will feel familiar: keyword comment → automatic DM. The real difference is what happens after that first message.

• A keyword trigger on comments from posts or reels.
• A public reply to the comment plus a private DM (private reply) to the author.
• Configurable scope: all your posts or only specific ones.
• Respect for Instagram's 24-hour messaging window.

ManyChat, at its core, is a flow builder: you draw every branch, button and canned reply in advance. It works, but any question you didn't anticipate falls off the flow. In Blind Agents, the automation fires the first DM, but the conversation is carried by an AI agent with your business context: it understands what the person writes, answers in natural language, and knows when to hand the conversation to a real person.

“The keyword opens the door; the AI agent is who actually answers.”

You set it up in the Automations section. Field names are stable; the flow has three blocks: Details, Trigger & message, and Agent & delivery.

1. Open Automations and click New. Under Details, name the automation and pick the Instagram channel.
2. Under Trigger & message, add your keywords as chips (for example, WANT, INFO, PRICE). Any one of them fires the automation.
3. Set the scope: all posts, or only specific ones by pasting the URL of each post or reel.
4. Write the opening message: the first DM anyone who comments will receive. Keep it clear and human; it is the start of the conversation.
5. Set an alternative public reply in case the person does not accept messages from everyone (we explain why below).
6. Under Agent & delivery, choose the AI agent that will continue the conversation and the mode: automatic (it answers on its own), copilot (it drafts and your team approves), or manual (it just opens the conversation for a person).
7. Save and turn it on. From the next keyword comment onward, the automation runs by itself.

• Automatic: the agent replies with no intervention. Great for high volume and repeat questions.
• Copilot: the agent drafts the reply and your team approves or tweaks it before sending.
• Manual: the automation opens the conversation and sends the first DM, but a person takes it from there.

The automation does the heavy lifting, but a few simple tweaks make the difference between a lost comment and an open conversation:

• Pick a short keyword that's easy to type, with no spaces or punctuation (for example, WANT or INFO), so people make fewer mistakes when commenting.
• Ask for it plainly in the post itself: "comment WANT and I'll DM you." The clearer the instruction, the more high-intent comments you get.
• Keep the opening message short with a single next step; it's the start, not the whole script.
• Use specific scope (paste the URL) for a one-off promo, and "all posts" when you want to catch the keyword all the time.
• Check the Monitor during the first week and adjust the keyword or the opening message based on your response rate.

Every automation reports its metrics in the Monitor, so you see the full funnel from comment to conversation:

• Triggered: how many comments fired the automation.
• Sent: how many automatic DMs went out.
• Delivered: how many reached the person's inbox.
• Read (Seen): how many were marked as seen.
• Response rate: what share replied and continued the conversation.

With those numbers you know whether the bottleneck is reach (few triggered), delivery (DM restrictions) or the opening message (low replies), and you adjust accordingly.

The result is simple: every high-intent comment becomes an open conversation within seconds, with an agent handling it and your team taking control whenever it wants.