02 June, 2026

AI Auto-Reply for Facebook Messages on Sales Fanpages

In a day, your fanpage gets a few hundred messages and comments. Customers ask about prices, stock and shipping. In the evening and on weekends it all piles up and the staff on duty can't keep up. AI that replies to Facebook messages is built for exactly this situation: it understands customers like a skilled sales rep, replies instantly on both Messenger and comments, and gathers leads in one place. We at MONA build Gấu Cười AI chatbot to work in exactly that direction.

A customer messages the fanpage at midnight and waits until morning with no reply

A customer messages the fanpage at midnight and the old bot answers wrong, so AI replying to Facebook messages takes over
A customer messages late at night, the scripted bot gets one answer wrong, and the customer is gone.

Try opening last month's fanpage message stats. Most customers message outside office hours, when they have free time. The team on duty has clocked off, the customer asks and sees no reply, and ten minutes later they buy elsewhere.

A wrong answer from an old scripted bot and the customer is gone

A scripted bot follows a decision tree and makes customers press exactly the right button to be understood. If customers type freely, ask several things at once, or stray from the preset keywords, the machine answers off-topic. Every wrong reply is a customer who gets annoyed and leaves.

How AI replies to Facebook messages differently from a scripted chatbot

AI that replies to Facebook messages understands context instead of matching keywords like a scripted chatbot
An old chatbot matches keywords. An AI agent understands the whole sentence and the earlier conversation.

The difference is at the core. An old chatbot matches keywords. An AI agent runs on a large language model and understands the whole sentence and the earlier conversation.

Understands what the customer means even when it's phrased loosely

When a customer types “do you still have the one from the other day”, the AI still works out which item they're asking about. It remembers what the customer viewed and messaged, so they don't have to start over. It answers in a human voice, not a pasted template.

One AI covers all Messenger, comments and fanpage inbox

One AI that replies to Facebook messages covers all Messenger, comments and inbox on fanpage ads
Wherever customers ask on the fanpage, someone answers, nothing is missed.

Your customers don't only use Messenger. They comment under posts, message the inbox, and ask in ad posts. Putting one person on each spot is both costly and leaky.

Reply to the comment, then move the customer to the inbox

When Gấu Cười sees a comment asking about price, it replies publicly with one short line, then sends the details privately to the inbox. Customers are looked after right away, the fanpage shows steady engagement, and no comment is left hanging all day.

For experts who put their own name on social media, we package this comment and inbox coverage into app nhanhieu.ai. The interaction screen automatically spots who is a potential customer, meaning someone asking about what you sell. Abusive comments are blocked by the Toxic Bouncer, and troublemaking accounts are collected in a separate list. The video below walks through the whole app screen by screen, and these two screens start at 8:28.

Read the video transcript (11:46)

0:00 Introduction
Hi everyone, I'm Hùng, CEO and founder of MONA. Today I'm going to demo the final version of the personal branding app, it's at nhanhieu.ai. This app was made directly for one purpose, which is to help people who are already experts in some field build a personal brand, so they can go online and share useful knowledge, information and experience. And we take advantage of how far AI has come to edit and create video effects like the ones you've been watching, to grab attention and make our videos one notch more engaging. That means we just need to talk and share real knowledge, it doesn't have to involve tricks or extra stuff, like having to be hyped up, cheerful, crack jokes or tell charming stories. So if you're an expert and you're not good at all that, you just share your experience directly, and the AI handles the rest: it illustrates and visualises what you're explaining and presenting, it adds music and effects to make the video more interesting, so we can reach more people on social media, or you can use it to run ads.

1:30 AI-edited results
OK, so how it works, but before getting into how it works, let me show you the output, and the volume it's producing for me right now. You can follow it on Khánh Hùng Academy's social media, or you can go straight to nhanhieu.ai and see that I'm putting out videos every day, because filming only takes me 2 minutes a day, then I upload the video, it edits the video for me, and then it automatically schedules it to post every day. I've set it to put out 2 a day, but you can go at a slower pace, around 3 a week. Or if you're already comfortable in front of the camera you can push the number up, because honestly, for an expert, shooting a video is, I think, extremely simple. You just need a little prompt, and I'll talk about that too. OK, so the first feature you'll probably care about most is sending a video straight to it for editing.

2:46 Sample videos
Let me pause a few seconds so you can see some sample videos, and it can make a huge range of video types. Starting with my video up top, a pink gaming style, it's an e-learning course showing you how to sell digital products, and also me being in the software field. I wanted a game-related theme. Here, let me play a bit for you. Then you can see, this is Nhân Võ AI. And you can see this is Nhân Võ's style, he's an account manager in sales. The main theme he wants to talk about is money and sales. Next is Hữu Hùng MONA, his theme is programmer, and his role is MONA's product director. Next you can see Dr. Tuấn, the business doctor. And you can also watch the mindset-style explainer videos from Thanh Bình. This is Bình's, you can take a quick look for a few seconds.

3:54 Posting videos
OK, that's the output, and its number one main feature is sending videos up for it to edit. So here, you can see at the very bottom, these are the videos on my phone, meaning the videos you shot on your phone. The green check marks next to the videos show that we've already sent them, and up top is its queue, these are its queues. It's notifying us, it shows the progress of what we're doing, you can see it's finished editing and finished scheduling for a video like this. And this video here, the one I shot, is me talking along with a screen recording app, and the video you're watching right now was also made by it. I do the exact same thing. Once I finish shooting the video, I pick the footage and give it a few notes by voice. You can note anything, it picks up your voice automatically. This feature is pretty accurate. There, you can see, and you just tap Send and you're done. There, it edits it and then automatically schedules it to post for you. There, it's scheduled for Saturday, October 24. I'm shooting this video on October 15. There, this is the finished edited video.

5:05 Posting schedule
There, and I'll open its posting schedule screen for you. There, this is this week, this is next week. It's filled up to Saturday next week already. There, because it only takes 2 minutes a day, so I shoot pretty quickly, a video like this I shoot really fast. These are the finished videos it has already made.

5:23 Talking to Hùng nhỏ AI
OK, now we get to the second screen, the screen where we can give Hùng nhỏ AI any command and it responds. There, here I'm saying schedule a meme post. Have the machine go and post seed comments, so we get engaging content and more interesting comments, on this messages screen. There, it reports everything to you here. And likewise you can send it anything through the feature of talking to it directly.

5:48 Funny images
Next is the screen I just mentioned, where we post memes. Memes or funny images, it posts them to stories by itself, all of it, for you.

5:56 Ideas
And next is a feature that's also pretty important for some of you, the ideas feature. Ideas works like this: you pass it any piece of content at all, whatever you're thinking about, anything in your head, you just say it in here to it. This is the most important part: it will never bundle it up and rewrite it into a script, instead it takes our rambling and breaks it into bullet points, so you can see bullet points like these, and for experienced people like you, each one of these bullet points can become a video on its own. We just need one prompt and we can make a video. And below that you can see the summary of the information that people who comment and people who message have sent us, people comment down here and this bot automatically collects it so you can get ideas from it. Then further down is the section on our students' worries and wants, we have those 2 criteria to put things like this together, and it's all summarized already.

7:06 Brand direction
And next, also very important, is your brand compass. When you decide to buy this app, the MONA team works out the very basic things with you, like imagery and colors. As you can see, the pink theme really grabs attention, so that's what we chose. And for each of your personal brands, the MONA team researches and advises you to choose an image. As you can see here, I want to come across as someone who understands technology, uses technology for everything, does it the smartest way and leaves nothing to luck in business thinking. And you can see that all the content I've uploaded sticks to this axis, to make this image clear. That's the main purpose of this brand compass: it's there so you don't have to second-guess whether some content you post drifts off topic. For example, say you want to be a warm, gentle person who gives advice, but then you post some drama video, or a video discussing some drama, that pulls you away from your warm image. This personal brand compass screen is the screen that keeps that from happening.

8:18 Per-video reports
OK, next are the reporting features. You can see it's pretty simple, it's just reporting the numbers, and of course it's accurate.

8:28 Engagement and potential customers
And further down are other screens about engagement and potential customers. It figures out potential customers on its own. People engaging is 340-something here, already viewed. Here there's about 200-something new messages and 30-something comments. And of course it has picked out who the potential customers are, meaning people asking about the products and services we sell. In my case that's obviously the software products. All these screens are pretty basic.

8:53 Toxic Bouncer
And one more screen that's extremely important, which you really should pay attention to, is this Toxic Bouncer screen. This screen of course blocks all the insults and abusive language. This is one of the important screens for those of you who are experts, because showing up on the internet you get abused often, extremely often, and it has nothing to do with your expertise or with the content you're talking about. There will always be some guy who swears at you. And there'll be quite a lot of them. And you absolutely should not look at that stuff, because MONA has a lot of experience with this: you've got lots of campaigns, lots of channels, lots of campaigns running really well, and then an expert, the head of that organization, gets humiliated because some random idiot on the internet comments something abusive. You shouldn't look at that, and of course this feature also handles things like putting them on a list, so you can exclude them from your ad campaigns in the future if you want to run ads. This is an extremely important feature for building our personal brand.

10:04 Your own app on your device
So all of that is the features of this nhanhieu.ai app, and you'll get all of these features, and it sits right on your machine, built just for you, like this screen here, you can see it lives directly on your machine and only on this machine. And the video editing itself and the other tasks won't use up this machine's resources, and you don't need to pay any other AI fees, just one service fee for the app itself.

10:34 Pricing
And now I'll talk about the service cost and the other parts of the app. You can see that at the start there are 2 fees. The first fee is for setup and for building and defining our brand identity, it's a cost for a specialist who advises you and defines that brand identity for you, we can call it a one-time setup fee. And after that, of course, there's a monthly fee for you when you use an app like this as the resource for video editing and social media management, that goes without saying. And the cost depends on how much we plan to post as part of our decision to build a personal brand.

11:15 Contact
Of course the MONA team will explain all these policies to you in full, just call 1900 636 648 or go to nhanhieu.ai to chat with Gấu Cười, it's in the bottom right corner here, it'll answer all your questions. OK, thank you all so much for watching this video.

Replying in the first 5 minutes saves most of the orders that are slipping away

AI that replies to Facebook messages within the first 5 minutes helps save most of the orders that are slipping away
A lead answered within the first five minutes has a much higher close rate than one that waits an hour.

A lead answered within the first five minutes has a much higher close rate than one that waits an hour. On Facebook customers lose patience even faster, and if another fanpage replies first, they're gone.

AI replies instantly, even at 2 a.m.

AI doesn't take shifts, doesn't get stuck at lunch, and doesn't skip a single message overnight. Whenever a customer messages, someone answers right away while they're still interested. That's how you business automation keep money in your pocket.

Old scripted Facebook chatbot vs an AI agent that understands

Comparing an old scripted Facebook chatbot with an AI agent that understands and auto-replies to messages
One side replies for show, the other understands in order to close.

Many of you are running a chatbot with a preset script. It still runs, but it's letting customers slip away every day without you seeing it.

The difference is understanding versus not understanding

The old bot only matches keywords, goes silent if asked something off-script, and has no memory of context. An AI agent understands the whole sentence, remembers the full conversation, advises, and then asks for information naturally. One side replies for show, the other replies to close.

An AI agent replies as naturally as a real sales rep

AI that replies to Facebook messages as naturally as a real sales rep, advising and asking for customer details
Gấu Cười advises with a clear flow, asks follow-up questions when needed, then smoothly asks for the customer's details.

Customers don't like talking to machines. If the answer is stiff, they know it's a bot right away and lose interest.

Advises, suggests, asks follow-ups when needed

Gấu Cười advises with a clear flow, asks back when information is missing, and suggests more items that fit the need. Customers feel like they're chatting with a sales rep who really cares, not listening to a loudspeaker.

Gather every fanpage message into a single lead profile

AI that replies to Facebook messages gathers every fanpage conversation into one 360-degree lead profile
One customer, one profile. Open the account and the whole history is there.

A customer comments today, messages the inbox tomorrow, and writes again later from another account. If a different staff member handles each time, no one knows who this customer is or what they've asked.

One customer, one profile, and the sales team sees everything when they open it

Gấu Cười gathers conversations into a single 360-degree lead profile. Which product the customer likes, where they got stuck, what was promised, all on one timeline. If the account manager is on leave, someone else can read it in ten seconds and pick up the deal.

Automatically reminds you of deals about to go cold before you forget

AI that replies to Facebook messages reminds you of deals about to go cold so the sales team doesn't drop customers
If a lead goes quiet for more than a few days, the AI reminds the account manager to follow up, so nothing is dropped through forgetfulness.

Facebook leads go cold very fast. Ask and then leave it two or three days, and the customer forgets they were ever interested.

The AI watches and reminds, so nothing slips just because you're busy

The AI tracks every deal. If a lead goes quiet for more than a few days, it reminds the account manager to follow up, and if a lead is nearing its decision date, it warns you in advance. You don't lose a deal because you forgot or because the person in charge was busy.

3 trust tiers so the AI never sends customers something out of line

Three trust tiers so AI replying to Facebook messages never sends customers something out of line
The AI handles internal work itself, customer-facing messages must be approved by the account manager, and pricing is decided by a person.

The biggest worry about handing Facebook to AI is that it will say something wrong or make careless promises to customers. We designed Gấu Cười to run on three clear trust tiers.

  • Automatic tier: internal work like summarizing conversations, recording information and setting reminders. The AI does it directly.
  • Draft then approve tier: every message that reaches a customer is drafted by the AI first, and it only goes out once the account manager clicks Send.
  • Human decision tier: pricing, commitments and sensitive terms are always decided by a real person.

Replying on time to stay within Facebook's 24-hour policy

AI that replies to Facebook messages answers on time within the 24-hour window, without breaking Facebook policy
Because the AI replies instantly, conversations always stay within the 24-hour window Facebook allows.

Facebook limits the messaging window to 24 hours after the customer's last interaction. Replying late or spamming the wrong way easily gets your reach throttled, and in serious cases the page gets restricted.

Reply right inside the allowed window

Because the AI replies instantly, conversations always stay within the 24-hour window, with no loophole tricks. Messages go out at the pace Facebook allows, so your page stays safe while customers are looked after right away.

Which industries should add AI Facebook message replies first

The industries that should add AI replies to Facebook messages first are fashion, spa, F&B, education and real estate
Same engine, and we tune it to each industry's specifics.

The way it understands and gathers leads isn't limited to one industry. Same engine, and we tune it to each industry's specifics.

  • Fashion and cosmetics sold on fanpages: advising on size, stock and outfit pairing, and closing fast.
  • Spa and beauty: advising on treatment plans, booking appointments and sending reminders.
  • F&B and chains: taking table and food orders and collecting feedback.
  • Education and training centers: advising on courses and screening interested parents.
  • Real estate: high-value leads that need an instant reply and then an appointment with a real person.
  • Services and B2B: capturing needs, gathering profiles and handing over to the account manager who closes.

Why we invite you to choose MONA's Gấu Cười

Gấu Cười, the MONA mascot in a white THE MONA hoodie, AI that replies to Facebook messages, self-built and tested under real load
Software MONA wrote itself and uses every day, not a demo.

This is the question you should ask every vendor. We answer it straight.

Self-built software, tested under real load

Gấu Cười is software MONA wrote itself and runs under real production load, not a few drag-and-drop tools stitched together. To be straight about it, this is us eating our own cooking: MONA's own fanpage and channels have Gấu Cười on duty every day, with Account Helper behind it supporting the sales team and Dê Cười handling order closing, all three running on the DataFly Sales OS platform we developed ourselves. MONA has 8 years behind it, over 14,000 projects and an 85% client retention rate.

FAQ

FAQ: AI that replies to Facebook messages vs the old scripted chatbot
No need to write a rigid script. The AI understands and replies naturally.

Does AI that replies to Facebook messages need a script written?

No rigid script tree like the old bots. The AI understands and replies naturally, and we only load in your product information, brand voice and boundaries.

Can the AI reply to both comments and inbox?

Yes. Gấu Cười handles comments under posts, Messenger inbox and messages from ads, then moves customers into the inbox for deeper advice.

Is there a risk of breaking Facebook policy?

Because the AI replies instantly within the 24-hour window, conversations follow the pace Facebook allows, with no loophole tricks, so the page stays safe.

Will the AI send customers something out of line?

No. Every message that reaches a customer is drafted by the AI and approved by a real account manager before sending. Pricing and commitments are always decided by a person.

Can a small business with one fanpage use it?

Yes. The engine scales to your size. Call 1900 636 648 or email info@themona.global and we'll advise the right plan.

This week, try measuring how many fanpage messages you're losing

Try counting the fanpage messages and comments left unanswered outside office hours last month. Multiply that number by the value of an average order and you'll see the money slipping away every night. A real AI that replies to Facebook messages will take over the shift, reply as naturally as a skilled sales rep, gather leads in one place and hand them to a real person to close. See what Gấu Cười can do below, or call 1900 636 648 directly and we'll open a trial on your own fanpage.

MONA Sales OS · Gấu Cười

Let Gấu Cười watch your deals 24/7. Your team just closes.

Gấu Cười is a MONA AI agent running for real every day, not a demo: it covers customers across channels (Website · Messenger · Zalo OA · virtual call center), gathers every conversation into a single 360° lead profile, reminds you of deals about to go cold and drafts messages for the account manager to click Send. Behind it, Account Helper also watches deals for the sales team. Two bears, one system, running on the DataFly Sales OS platform.

🌙 24/7 multichannel coverage : a customer messaging at 11 p.m. still gets an instant reply, so no deal goes cold overnight.
🧠 Thinks like a real sales rep : when a customer shares numbers, Gấu analyzes feasibility, asks the right questions and then asks for info, never replying just for show.
🛡️ Declines with care : for wrong or risky requests it declines with an explanation and still suggests the right option right away, so you don't lose the customer.
📋 No careless quoting : for complex briefs it follows the proper process, asks for a name and email, and schedules an account manager to call back within 3 minutes.
👁️ 360° lead profile : Zalo, email, Messenger and the call center are gathered into one timeline; if an account manager is on leave, someone else reads it in 10 seconds and picks up the deal.
🟢🟡🔴 3 layers of trust : the AI handles internal work itself, customer-facing messages must be approved by the account manager, and pricing and commitments are always decided by a person.
AI agent for lead management contact MONA

The Messenger channel alone has a dedicated article that goes deep on covering the inbox and comments while running ads: chatbot Messenger.

MONA has a podcast: listen instead of readingEpisodes on AI, automation & SEO for Vietnamese businesses
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About the author

CEO & Founder · The MONA

The founder of The MONA built a service company of 60+ staff with 14,000+ projects delivered. Khánh Hùng shares his thinking on building self-running systems, automating a business, and the real lessons behind MONA's projects.

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