Facebook Comment-to-DM · Updated September 2026
Facebook Comment-to-DM.
Instant Messenger. Any Keyword.
Set a keyword on any Facebook post. Every commenter who types it gets an instant Messenger DM — automatically, 24/7, no manual work.
How Facebook Comment-to-DM Works
Set up once, runs forever. Four steps from zero to automated Messenger DMs.
Connect Your Facebook Page
Log in with Facebook and grant ReplyKaro access to your Page. Takes under 30 seconds.
Choose a Post & Set Keywords
Pick any Facebook post, video, or Reel. Enter the keyword(s) that should trigger the DM (e.g. 'SEND' or 'LINK').
Write Your Messenger DM
Compose the message, add buttons, images, or links. Preview before going live.
Go Live — Instant Delivery
Every commenter who types your keyword gets an instant Messenger DM — sub-second delivery, 24/7.
Everything in Facebook Comment-to-DM
Any post type
Works on Facebook posts, photos, videos, Reels, and carousels — any content on your Facebook Page.
Multi-keyword triggers
Set multiple keywords per automation. 'SEND', 'LINK', 'INFO' can all trigger the same DM.
Public comment reply
Optionally auto-reply to the public comment with 'Check your DMs!' to drive even more engagement.
Rich Messenger messages
Send text, images, buttons with URLs, or quick replies in the Messenger DM — not just plain text.
Any language support
Keywords work in Hindi, Hinglish, Arabic, Spanish, Tamil, Bengali, and every Facebook-supported language.
One-time send per user
Prevent spam: each user only receives the DM once per post, even if they comment multiple times.
Real-time analytics
Track how many comments triggered, how many DMs sent, and success rates in your dashboard.
Subscriber opt-in capture
Every commenter who receives a DM is added to your Facebook subscriber list for future broadcasts.
Facebook Comment-to-DM — FAQ
How does Facebook Comment-to-DM work?
Facebook Comment-to-DM works through Meta's official API. You set up a keyword trigger on any Facebook post. When someone comments that keyword (e.g. 'SEND', 'INFO', 'PRICE'), ReplyKaro detects it via a webhook, instantly sends them a private Messenger DM with your preset message, and optionally leaves a public comment reply like 'Check your DMs!'. The entire process takes under 1 second using the Meta Graph API.
Can I use Facebook Comment-to-DM for free?
Yes. ReplyKaro's Free Forever plan includes Facebook Comment-to-DM with 1,000 Messenger DMs/month at no cost. No credit card required. Paid plans start at ₹99/mo ($3/mo) for 15,000 DMs/month on Facebook Pages.
Does Facebook Comment-to-DM work on Reels and videos?
Yes. ReplyKaro's Facebook Comment-to-DM works on all Facebook post types — regular posts, photos, videos, Facebook Reels, and carousel posts. Any content published on your Facebook Page can have a keyword trigger set up to auto-send Messenger DMs.
Is Facebook Comment-to-DM safe — will my Page get banned?
ReplyKaro uses only the official Meta Graph API and Messenger Platform API — the same APIs that Facebook recommends for business automation. There are no browser bots or scraping. Meta rate-limits responses at safe thresholds (180–700 DMs/hour depending on your plan), keeping your Facebook Page fully compliant. No ReplyKaro Facebook user has ever had their Page banned for using Comment-to-DM.
What keywords can I use for Facebook Comment-to-DM?
You can use any keyword in any language supported by Facebook — including English, Hindi, Hinglish, Arabic, Spanish, Portuguese, Tamil, and 20+ others. Keywords are case-insensitive and support partial matching. Popular examples: 'SEND', 'LINK', 'PRICE', 'INFO', 'FREE', 'DEMO', 'INTERESTED'. You can also set 'any comment' mode to send a DM to every commenter regardless of keyword.