WhatsApp auto reply has three tiers: the free Business app's away/greeting messages (canned text), Business API chatbots (scripted flows), and intelligent agents (answers from your business information). Free auto-replies acknowledge; they rarely answer. When customers need actual answers, you need tier two or three.
Tier 1: The free Business app
The WhatsApp Business app includes a greeting message (sent when someone first messages) and an away message (sent when you're unavailable). You write the text once; it goes out automatically. Perfect for: “Thanks for messaging! We're closed now — we'll reply from 8am. For emergencies call 0xx xxx xxxx.”
It's genuinely useful, and it's free. But it's a note on the door, not a conversation: it can't answer “how much is a service call?”, can't qualify, can't book. Every message still needs a human eventually.
Tier 2: API chatbots
Move your number to the WhatsApp Business API and you can script real reply flows: keywords, buttons, menus, fixed answers to fixed questions. Customers get actual answers — for the paths you built.
The catch: real messages are messy. “Hi do you do geyser repairs in Ballito and how much for a callout” fits no button. Tier 2 answers the tidy 30% and routes the rest to you — or drops it.
Tier 3: Intelligent agents
An agent reads the message, checks your business information, and answers in your tone with your prices — then escalates what it shouldn't handle. It's auto-reply in the truest sense: the reply is automatic, and the intelligence is real.
Which tier is right?
| You're... | Start with | Move up when |
|---|---|---|
| Solo, closed after hours, few messages | Free app away message | Messages start going unanswered in real time |
| Steady enquiries, predictable questions | API chatbot flows | Customers ask things the script doesn't cover |
| Losing jobs to slow or wrong replies | Intelligent agent | — you're already there |
The honest caveats
The South African angle
In SA, after-hours auto-reply is table stakes — customers message at 9pm expecting a response by morning. Load shedding makes cloud-based tiers (2–3) more reliable than phone-based setups, and POPIA applies the moment you capture what customers tell the bot.
Frequently asked questions
How do I set up an auto reply on WhatsApp?
Free: WhatsApp Business app → Settings → Business tools → Greeting/Away messages. For real answers: the Business API with a chatbot or agent, configured by a provider.
Can I auto-reply on WhatsApp without the API?
Only canned away/greeting messages in the free app. Anything conversational needs the API.
Is auto-replying against WhatsApp's rules?
The app's own messages and official API automation are fine. Unofficial session-based automation is not.
What's the best auto reply message?
Warm, honest and specific: acknowledge, say when they'll hear back (or answer), and give a human escape hatch. Test it as a customer would read it.