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.
Facebook Comment-to-DM Use Cases
Real-world examples from businesses and creators using Comment-to-DM on Facebook.
Lead Generation
Post CTA
"'Comment GUIDE to get our free Facebook Ads playbook'"
Automation
Comment keyword 'GUIDE' → instant Messenger DM with PDF link + email capture button
500–2,000 qualified leads from a single viral post
E-Commerce Sales
Post CTA
"'Comment PRICE to see our latest collection prices'"
Automation
Comment 'PRICE' → Messenger DM with product images, prices, and 'Shop Now' button linking to your store
3–8× higher conversion vs link-in-bio
Event / Webinar Sign-Up
Post CTA
"'Comment FREE to get your webinar seat link'"
Automation
Comment 'FREE' → Messenger DM with registration link — subscriber auto-added to your Facebook list
Fill seats for free webinars without an email list
Coaching & Consulting
Post CTA
"'Comment CALL to book a free 15-min strategy session'"
Automation
Comment 'CALL' → Messenger DM with Calendly link + brief qualifier questions
Automated discovery calls booked 24/7 while you sleep
Discount Code Delivery
Post CTA
"'Comment SAVE20 to get your exclusive 20% off code'"
Automation
Comment 'SAVE20' → instant personalized Messenger DM with unique coupon code
Higher engagement on promotional posts and trackable coupon usage
Content Gating
Post CTA
"'Comment ACCESS to get the full video and resource kit'"
Automation
Comment 'ACCESS' → Messenger DM with locked content link — builds subscriber list automatically
Turn every post into a lead magnet without a landing page
Set Up Comment-to-DM in Under 5 Minutes
Works on any Facebook post, video, or Reel. No code, no API keys.
Connect your Facebook Page
Log in with Facebook at replykaro.com and authorize your Page via Meta OAuth. 30 seconds, no password sharing.
Choose a post and set keywords
Select any Facebook post, video, or Reel from your Page. Enter keywords like 'SEND', 'PRICE', or 'LINK' — or enable 'any comment' mode.
Write the Messenger DM
Type the message your commenters will receive. Add buttons, images, or links. Preview on desktop and mobile before publishing.
Enable and promote
Hit publish. Add a CTA to the post caption like 'Comment LINK below'. Watch DMs send automatically — no manual effort.
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