An auto DM is a direct message sent by software instead of by you. Someone comments "GUIDE" under your reel, and a few seconds later they receive a private message with the link to your free guide. Someone writes "price?" in your inbox at 2 a.m., and an auto-reply answers with your offer page. The conversation starts without you touching your phone.

It concerns creators and small brands who sell from social media, especially on Instagram, Facebook and TikTok. When a single post brings 400 comments asking for the same link, answering by hand is a full day of work. An auto DM turns that wave into a list of people who received your link, while it is still fresh in their mind.

What is an auto DM?

An auto DM, or auto-reply, is an automated private message triggered by an event on a social account. The common triggers are:

  • Comment keyword: a user comments a specific word on a post, and receives a DM. This is the "comment LINK to get it" format.
  • Story reply or mention: a user replies to a story or mentions you, and receives a message.
  • New message: a user writes to you for the first time, and receives a welcome or an FAQ menu.
  • Keyword in DM: a user sends a word such as "price" or "shipping", and receives a prepared answer.

Tools such as ManyChat connect to the official messaging APIs of Meta and other platforms to send these messages. Instagram and Facebook also offer basic built-in options, like saved replies and instant replies for business accounts.

An auto DM is not spam, as long as the person asked for it by commenting or writing. It is also not a chatbot that understands everything: most auto DMs follow fixed rules and buttons. And it is not a replacement for real conversations with buyers who have questions.

Why it matters

Comment-to-DM posts tend to earn more comments, because commenting is the price of the link, and platforms read comments as a sign of interest. They also move the link from a place where it is hard to find, your bio, into a private chat where it is one tap away.

A worked example. A fitness coach with 12,000 followers posts a reel: "Comment PLAN for my free 7-day workout plan."

  • The reel gets 600 comments with the keyword.
  • 600 auto DMs are sent, one per commenter.
  • 55% open the message and tap the link: 330 visits to the opt-in page.
  • 40% of visitors leave their email: 132 new subscribers.
  • Over the next month, 4% of them buy a $67 program: about 5 sales, or $335.

Without automation, the coach would have needed hours to send 600 messages, and most commenters would have received the link too late. With a link in bio only, the typical click-through from a reel is far lower, because viewers must go to the profile, find the link and choose it.

How it works

The setup is similar across tools.

  • Connect the account. Link a professional Instagram or Facebook account to the automation tool through the platform's official login.
  • Choose a trigger. A keyword on a given post, on all posts, in a story reply or in a DM.
  • Write the message. A short greeting, one sentence of context and a button with the link. Some tools ask the user to tap a button first, which opens the conversation window.
  • Add the destination. A product page, an opt-in form or your link-in-bio page.
  • Publish the post with a clear call to action. Say the exact keyword and what people will receive.
  • Watch the results. Messages sent, opened, button clicks, and what happens on the destination page.

Platform rules frame all of this. Meta, for example, limits when a business can message someone who has not written recently, and allows a private reply to a comment only within a limited time after it. Tools that use the official API follow these rules. Tools that do not can put your account at risk.

Benchmarks and examples

Numbers vary with audience and offer, but these ranges are common for creators:

  • Open rates for DMs that people asked for are high, often 70% to 90%, far above email.
  • Button click rates in the DM often sit between 30% and 60%.
  • Opt-in rates on the destination page commonly range from 25% to 50% for a free resource.

Typical situations:

  • A recipe creator: "Comment SOUP for the full recipe," linking to a free recipe card that asks for an email.
  • A skincare brand: an auto-reply to "price" with the product page and a first-order discount code.
  • A course creator during launch week: "Comment COURSE for the early-bird price," linking to the sales page.

Common mistakes

  • A keyword that is hard to type. Long or mixed-case words reduce comments. Use one simple word.
  • Sending a link without context. A bare URL looks like spam and gets ignored.
  • Pointing to the wrong page. Sending buyers to your homepage instead of the product loses the intent.
  • Never reading the replies. People answer auto DMs with real questions. Leaving them unanswered wastes the best leads.
  • Using unofficial tools. Tools that mimic a human login break platform rules and can get the account restricted.

Best practices

  • Deliver exactly what the post promised. If the reel says "free plan," the first line of the DM gives the free plan.
  • Keep the message short. Two or three lines and one button. The goal is the click.
  • Send people to a page built for mobile. A fast page with the product and the checkout converts the attention before it fades.
  • Tag the traffic. Use a dedicated discount code or link per campaign to know which post drove the sales.
  • Follow up by email, not by DM. Once someone subscribes, continue the conversation in your inbox, where you own the list.
  • Check the inbox every day. Answer the humans who reply. That is where social selling happens.

In Roctify

Roctify does not send automated DMs or replies on social platforms. If you use a DM automation tool, Roctify is where the link leads: your link-in-bio page with built-in checkout, a product page in your online store, or a form that collects emails on the Creator plan and up. Digital products are delivered automatically by email after payment, so the buyer who tapped the link in a DM receives the file without you stepping in.

To measure what a comment campaign really sells, create a discount code for that post and track the orders that use it. Social selling tools are on the Roctify roadmap, not available yet.

FAQ

Is sending auto DMs allowed on Instagram?

Yes, when you use a professional account and a tool built on Meta's official messaging API, and only message people who interacted with you. The platform sets limits on timing and volume. Tools that simulate a human login instead of using the API break the rules.

Link to the page that matches the promise of the post. If the post offered one product or one freebie, send people straight to it. Your link-in-bio page works best when the post invites people to browse several offers.

Do auto DMs hurt reach?

Not in themselves. Comment-to-DM posts often earn more comments, which platforms treat as interest. Reach suffers when the post looks like pure bait with no value, so give something useful in the post itself.