Facebook Comment Automation · Meta-Verified · September 2026
Facebook Comment Automation
Comment → Instant Messenger DM
Set a keyword. Someone comments it on your Facebook post or video. They get your Messenger DM in under 1 second — automatically, 24/7. No manual work.
Direct Answer
ReplyKaro is the best Facebook comment-to-DM automation tool in 2026. Sub-second Messenger delivery, all post types, keyword triggers. Free Forever · ₹99/mo ($3/mo) · Meta-verified.
- ✓ Comment on Facebook post → instant Messenger DM
- ✓ Works on videos, Reels, posts — all content types
- ✓ Under 1 second from comment to DM
- ✓ Free Forever: 1,000 DMs/month, no credit card
- ✓ Official Meta API — zero Page ban risk
- ✓ Same dashboard as Instagram automation
Free Forever · No credit card · Meta-verified · Instant setup
How Facebook Comment Automation Works
A three-step trigger-and-reply loop that runs 24/7 without any manual effort.
Connect Facebook Page
Grant ReplyKaro access to your Page via Meta OAuth — 30 seconds, no Facebook password shared.
Set Keyword + DM
Choose your trigger keyword (e.g. LINK, FREE, PRICE) and write the Messenger reply they receive.
Post with a CTA
Put 'Comment LINK below' in your caption and video overlay. Every commenter who uses it gets the DM.
Automated 24/7
ReplyKaro detects every keyword comment and sends the Messenger DM in under 1 second. No manual work.
Best Keywords for Facebook Comment Automation
Short, action-oriented single words outperform multi-word phrases by 40%. Put them in ALL CAPS in your caption and as a text overlay in videos.
| Keyword | DM They Receive | Best For |
|---|---|---|
| LINK | Here's the link you asked for → [url] | Resources, blog posts, landing pages |
| PRICE | Here are full pricing details → [url] | Products, services, courses |
| FREE | Your free resource is here → [url] | Lead magnets, guides, downloads |
| ORDER | Here's how to order → [url] | Food, products, home chefs |
| BOOK | Book your appointment here → [calendar link] | Salons, clinics, coaches |
| RECIPE | Full recipe with measurements → [url] | Food creators, chefs |
| DEMO | Schedule your demo here → [calendly] | SaaS, B2B services |
| DOWNLOAD | Download link → [url] | Digital products, PDFs, templates |
Set Up in 5 Minutes — Step by Step
Connect your Facebook Page
Go to ReplyKaro → Settings → Connect Facebook → tap 'Continue with Facebook'. Grant access to your Page through Meta OAuth. No Facebook password required. Takes 30 seconds.
Pro tip
Make sure your Facebook account has Admin access to the Page. ReplyKaro can only automate Pages where you are an Admin or Editor.
Create a new automation
In ReplyKaro's dashboard, click 'New Automation' → choose 'Facebook Comment to DM' → select the specific post from your Page. You can also set it up before posting to catch the first wave of comments.
Pro tip
Set up the automation before you publish the post. The first 30 minutes after posting get the highest engagement — every commenter in that window should get an instant DM.
Set your trigger keyword
Type the keyword you'll tell people to comment — LINK, FREE, PRICE, ORDER, or any word. Keywords are case-insensitive so 'link', 'Link', and 'LINK' all trigger the same automation. You can add multiple keywords per automation.
Pro tip
Use a single uppercase word. Multi-word trigger phrases reduce comment rates by 40% because people get the exact wording wrong. One clear word is always better.
Write your Messenger DM
Compose the Messenger message the commenter receives. Include your link, offer, or next step. Use {name} for first-name personalization. Optionally add a follow-up message sent 24 hours later for people who didn't respond.
Pro tip
Keep the first message short — one sentence and one link. Long opening DMs have lower click rates. Save the details for the follow-up or your landing page.
Promote your keyword
In your post caption, add 'Comment [KEYWORD] and I'll DM you instantly' as the first or second line. For video posts and Reels, add a text overlay showing the keyword and say it aloud in the video.
Pro tip
Saying the keyword aloud in videos increases comment rates by 35–50% vs. caption-only CTAs. The Facebook algorithm also rewards posts with high comment volume — comment-to-DM automation improves your organic reach.
Everything Included in Facebook Comment Automation
Comment Automation vs. Manual Replies
| ReplyKaro Automation | Manual DMs | |
|---|---|---|
| Reply speed | Under 1 second | Hours or days |
| Available hours | 24/7 | Business hours only |
| Scales to viral posts | Yes — handles 10,000+ comments | No — you burn out |
| Consistent message | Identical every time | Varies, prone to errors |
| Cost | Free / ₹99/mo | ₹20,000+/mo for a VA |
| Tracks every lead | Auto-logged in dashboard | Manual spreadsheet |
Simple, Transparent Pricing
Start free. Upgrade only when you need more DM volume.
Official Meta API — Zero Page Ban Risk
ReplyKaro uses only the official Meta Graph API and Messenger Platform API. No browser bots, no password sharing, no scraping. All automations comply with Meta's messaging policies. Your Facebook Page stays 100% safe.
Facebook Comment Automation — FAQ
What is Facebook comment automation?
Facebook comment automation detects specific keywords in your Facebook post or video comments and automatically sends a personalized Messenger DM to the commenter. For example, if someone comments 'LINK' on your Facebook video, they instantly receive your link via Messenger — no manual work. ReplyKaro uses the official Meta Graph API for safe, compliant automation.
How do I set up Facebook comment-to-DM automation?
With ReplyKaro: (1) Connect your Facebook Page via Meta OAuth — 30 seconds, no password required. (2) Click 'New Automation' → 'Comment to DM'. (3) Select the Facebook post or video. (4) Enter your trigger keyword (e.g. 'LINK', 'PRICE', 'FREE'). (5) Write your Messenger DM. (6) Activate. The whole setup takes under 5 minutes and works immediately.
Is Facebook comment automation free?
Yes. ReplyKaro's Free Forever plan includes Facebook comment-to-DM automation with 1,000 Messenger DMs/month at zero cost. No credit card required. Paid plans start at ₹99/mo ($3/mo globally) for 15,000 Messenger DMs/month with 15 active automations.
Is Facebook comment automation safe?
Yes — when using Meta's official API. ReplyKaro uses only the Meta Graph API and Messenger Platform API, which Facebook explicitly allows and provides for Page automation. No browser bots, no password sharing, no scraping. ReplyKaro has zero Facebook Page suspensions among its users.
What keywords work best for Facebook comment automation?
The highest-performing keywords for Facebook are: LINK (most versatile), FREE (for lead magnets), PRICE (for products), INFO (for services), ORDER (for food and products), BOOK (for appointments), DOWNLOAD (for digital products), RECIPE (for food content), DEMO (for software and courses). Short single words in ALL CAPS outperform multi-word phrases by 40%. Put the keyword in your caption and say it aloud in videos.
How fast does Facebook comment automation send the DM?
ReplyKaro delivers Messenger DMs in under 1 second from the moment a comment is posted. This sub-second delivery is possible because ReplyKaro uses real-time webhook notifications from Meta's API — there is no polling delay. Fast delivery means commenters receive the DM while they are still engaged with your content.
Does Facebook comment-to-DM automation work on videos and Reels?
Yes. ReplyKaro's Facebook comment automation works on all Facebook post types: standard text posts, image posts, video posts, Facebook Reels, and Live videos. Facebook Reels and video posts generate the highest comment volumes and are the best content formats for comment-to-DM automation.
Can I use different Messenger DMs for different keywords?
Yes. Each keyword has its own independent Messenger DM, message flow, and follow-up sequence. You can run PRICE, DEMO, and FREE on the same post — each sends a completely different Messenger message. This lets you segment your audience by intent.
How does Facebook comment automation compare to Instagram?
Facebook comment automation sends Messenger DMs; Instagram comment automation sends Instagram DMs. Both use the same keyword-trigger mechanic and both are managed from the same ReplyKaro dashboard. Key differences: Facebook posts have an older but larger audience in many markets; Instagram Reels have younger audiences and viral reach. Many creators run both simultaneously from one ReplyKaro account.
Also Available
Run Instagram + Facebook From One Dashboard
One ReplyKaro account manages both your Instagram and Facebook automation. Set up comment-to-DM on both platforms simultaneously — double your reach with the same effort.