Comment-to-DM automation sends a private message with your link to anyone who comments a chosen keyword on your post or Reel. It is the fastest way to turn attention into clicks, followers, and sales, and you can do it for free. This guide covers the whole thing: setup, keywords, the follow gate, affiliate links, and how to see what actually worked.
How comment-to-DM works
You choose a keyword (say SHOP) and a link. A tool watches your comments through Instagram's official API. The moment someone comments SHOP, it replies to them privately with your link. No manual work, no bot on your account, no password shared.
Pick a keyword that converts
Short, obvious words win because they are easy to type and remember. Good ones: LINK, GUIDE, PRICE, SHOP, MENU, CODE. Put the ask in your caption and say it out loud in the Reel: "comment GUIDE and I'll DM you the full itinerary."
Use a follow gate to grow followers
A follow gate asks the commenter to follow you before the link is sent. Because they already want what you are offering, most follow, so the same Reel that drives clicks also grows your account. This is the single biggest reason creators keep automations on. More on this in growing Instagram with Reel comments.
Send affiliate and product links (as cards)
The link can be an affiliate link, a product page, or your link-in-bio. When it is a shopping link, the best tools send a card with the product image, title, and price, so it looks intentional in the DM instead of a bare URL. Always follow the disclosure rules for affiliate links in your region.
Measure what happened
Views alone do not tell you if a Reel worked. Track the real funnel: comments with your keyword, DMs delivered, and link clicks. When you can see that 44 out of every 100 commenters opened your link, you know which Reels move people and which just get views.
Free vs paid
Many tools charge more as your audience grows, or gut the free plan to a handful of contacts. Tem is free to start with no card, sends automated DMs every day at no cost, and its paid plan is flat (never billed per contact), from Rs 99/month in India. It is a straightforward ManyChat alternative for creators who mainly want comment-to-DM.
Setup in two minutes
- Connect Instagram (creator or business account).
- Pick a Reel, choose a keyword, paste your link.
- Turn on the follow gate, and publish.
New to this? Start with how to auto-DM people who comment on your Reel.