WhatsApp Business Auto-Reply: The Complete 2026 Guide
How to set up auto-replies on WhatsApp Business: greeting and away messages, their limits, official API rules, and how AI assistants answer real customer questions 24/7.
If you run a business on WhatsApp, you already know: customers write at all hours, and every unanswered message is a potential customer lost. This guide covers how to set up auto-replies on WhatsApp Business with the native tools, where those tools stop helping, and when it makes sense to move to an AI assistant that actually answers questions.
What WhatsApp Business offers out of the box
The free WhatsApp Business app includes two kinds of automatic message:
1. Greeting message
Sent automatically when a customer messages you for the first time (or after 14 days of inactivity). To enable it: Settings → Business tools → Greeting message.
"Hi! Thanks for reaching out 💬 We reply within minutes during opening hours (Tue–Sat, 9–19). If you'd like to book, tell us your preferred day and service."
2. Away message
Sent outside business hours. Enable it under Settings → Business tools → Away message, with a customizable schedule.
"Thanks for your message! We're closed right now — we'll get back to you first thing tomorrow. If it's urgent, leave the details here."
The limits of native auto-replies
WhatsApp Business auto-messages are a good start, but they have three hard limits:
- They don't answer questions. A customer asks "How much is a blow-dry?" and gets "Thanks for your message." The conversation stalls until a human steps in.
- One message for everyone. You can't vary the reply based on what the customer actually wrote.
- No bookings. An away message doesn't collect details, propose time slots, or confirm appointments.
The result: the customer gets an "instant" reply that doesn't help them, and the real answer arrives hours later — often after they've already messaged a competitor.
AI auto-replies: what changes
An AI assistant connected to WhatsApp Business (through Meta's official API) doesn't send a canned message — it reads the question and answers it, using your business information: price list, opening hours, services, policies.
| Native auto-messages | AI assistant | |
|---|---|---|
| "How much is X?" | "Thanks for your message" | Answers with the actual price |
| Outside hours | Away message | Answers and takes the booking |
| Follow-up questions | No response | Continues the conversation |
| Bookings | No | Proposes and confirms slots |
With PlugDialog, you set the assistant up by describing your business — no flow builders or diagrams. The AI learns from your price list and rules, and you review conversations to refine it. It works on WhatsApp, Instagram and Telegram from the same panel.
Setting it up in 3 steps
- Connect WhatsApp Business through Meta's official API (no password required, fully compliant with Meta's rules).
- Describe your business: services, prices, hours, frequent questions. About 15 minutes.
- Turn it on and watch: the AI replies, you see everything and can step in anytime. Complex conversations are routed to you automatically.
Frequently asked questions
Can I use auto-replies on regular WhatsApp (not Business)?
No. Greeting and away messages only exist on WhatsApp Business. AI automation additionally requires Meta's WhatsApp Business API.
Are automatic messages allowed under WhatsApp's rules?
Yes — if you use the native tools or a provider that goes through Meta's official API. Avoid tools that ask for your password or drive WhatsApp Web unofficially: you risk having your number blocked.
Can the AI get an answer wrong?
It can happen, which is why a good system shows you every conversation and lets you intervene in real time. Over time, correcting the underlying information makes errors rarer.
How much does WhatsApp Business automation cost?
The native tools are free. AI assistants typically start at a few dozen euros per month — PlugDialog offers a free trial so you can see how it answers your real customers before paying.