Post comments
Every planSomeone comments your keyword, they get your DM about three seconds later. Every comment without it is left alone.
How Post comments worksFeatures
Every one of them exists to get the right Instagram DM to the right person, about three seconds after they ask, without you picking up your phone.
Triggers
Wherever someone asks, the answer goes out. Comments, reels, stories, mentions, ads and your inbox all fire the same automation.
Growth
A comment is attention. These turn it into a follower, an email address and a second sale.
Conversations
Most automations are one message. When yours needs to be more, these give it buttons, branches and a head start.
AI
Keyword DMs go out exactly as you wrote them. For everything a keyword can't predict, the AI answers the way you would.
Integrations
Send people to Shopify, a booking page, a course or your email list, and send the leads you capture to the tools you already run on. Wherever the money actually happens.

From people using it
$1.2M in sales from comments
9 hours a week, handed back
34K new followers in 60 days
62% of DMs get a reply
Before you ask
No. ReplyRep runs on Meta's official Instagram API and is a Meta Business Partner. We never ask for your password, we stay inside Meta's rate limits, and we only message people who interacted with you first. That last part is the whole difference between automation and spam.
Keyword DMs go out exactly as you wrote them: your words, your emoji, your line breaks, with their first name filled in. For open questions in your inbox, the AI replies in your voice, trained on your offers and the way you actually write.
Meta caps how fast any tool can send. On paid plans, anything over that limit waits in the Excess DM Queue, in order, instead of being dropped, and SendBack goes back for anything that was skipped or delayed. Plans are sized by monthly DMs, so size yours for your busiest month.
Yes. Meta's official API works with professional Instagram accounts, Business or Creator. Switching is free in the Instagram app's settings and takes a minute.
Most people are live in about four minutes: connect the account, pick a post, set a keyword, write the DM. No flowchart required. Comment your own keyword to test it before anyone else sees it.
ManyChat bills by active contacts: its free plan covers 25 contacts, and paid plans start at $14 a month for 250. ReplyRep bills by DMs, starting with 2,000 free every month. If a reel brings 3,000 new people into your DMs, ManyChat's cheapest option that month is about $54. On ReplyRep that is 3,000 DMs, one each, which fits inside Lite at $10. ManyChat prices as listed on its pricing page on 19 October 2026. See the full comparison.
Still stuck on something? Ask us and a person answers.
Connect an account, pick a keyword, write one message. The free plan has 2,000 DMs a month, no card and no trial timer, so you will know inside a day whether it's worth paying for.