Free Instagram auto DM: what you really get
Yes, you can auto DM for free
CommentDM's free plan sends up to 100 automatic DMs a month from one Instagram account, with no badge added to your messages. You get keyword and any-comment triggers and the full delivery log, so you can see every DM that went out.
What "free unlimited" usually means
Some tools advertise free unlimited DMs. Check three things before you trust it: whether a badge or ad is added to your DMs, whether there's an hourly or contact limit in the small print, and how the company pays for running it. Sending DMs costs money to run, so someone pays somewhere.
When to upgrade
If a reel takes off and hundreds of people comment, 100 DMs runs out fast. CommentDM's Starter plan is ₹299 / $7 a month with unlimited DMs, follow check, link buttons, email capture and the comment spam shield.
Is a free auto DM tool safe?
It is if it uses Instagram's official API. You log in on Instagram's own page, the tool never sees your password, and sending stays within Instagram's limits. Avoid any tool that asks for your Instagram password.
Set it up in a minute
Switch to a Business or Creator account, connect it to CommentDM, pick a keyword such as GUIDE, write your DM and turn it on. The next person who comments GUIDE gets your message.