A message at 9 p.m., a quote requested while you're on a job, a question asked on a Sunday: without a fast reply, each of these is a customer going cold. The WhatsApp Business auto-reply is the first reflex for never leaving a message unanswered again. This guide walks you through the settings that power a WhatsApp channel run by an AI sales agent, with ready-to-copy examples by trade — and, above all, the one limit to know between a fixed reply and a reply that genuinely understands the request.
What exactly is a WhatsApp Business auto-reply?
An auto-reply is a message sent back with no action from you, the moment a customer writes to you. On WhatsApp Business, it comes in two native forms: the greeting message, triggered when a new contact writes to you for the first time, and the away message, sent outside your hours. You set the rule once, and WhatsApp answers on your behalf, day and night.
Be careful not to conflate two very different things that share the same name. An auto-reply can be fixed (the same text every time, whatever the incoming message) or smart (an AI reads the request and replies in context). The free app only does the first. We'll come back to this below, because it changes everything in practice.
Why it became essential in 2026
Customer behaviour has shifted. On WhatsApp, people don't wait: the channel feels instant, just like messaging a friend. In practice, a prospect who messages you and hears nothing within ten minutes assumes you're closed, swamped or not serious — and sends the same message to two other businesses. Speed of first reply is now a decision factor as strong as price.
Yet most requests don't land when you're free. A large share arrive in the evening, at weekends, or while your hands are full. The auto-reply isn't a comfort gadget: it's what keeps the contact alive during the 16 hours a day you can't reply yourself. To lay the groundwork before you automate anything, our guide to WhatsApp automated messages breaks down the four building blocks to know.
Why an auto-reply changes the game
Reepli.ai — WhatsApp auto-reply 2026
The 2 native auto-replies in WhatsApp Business
No need to overcomplicate: two free settings cover the essentials of first contact for a sole trader, a local shop or a small business. Here's how each works and what it's for.
1. The greeting message
This is the first reply sent automatically when a new contact writes to you (or after 14 days of silence). Its job: welcome, reassure and set the expected reply time. A good greeting message confirms the customer is in the right place and that their request has landed, even if no one is behind the screen yet.
2. The away message
It fires automatically outside your opening hours. Unlike the greeting, it manages expectations: it says when you'll be back and, ideally, offers an action in the meantime (leave a number, flag urgency, check a useful detail). It's your night watchman.
/price or /hours) round out these two settings, but they're not fully automatic — you trigger them with a keyword. They save huge time on recurring questions, without replacing a genuine instant reply.
Ready-to-copy auto-reply examples
These templates adapt by simply changing the name, town and trade. Keep them short: a long auto-reply is rarely read to the end.
Hi, and thanks for your message 👋 This is [BUSINESS NAME] in [TOWN]. We've received your request and will get back to you very soon. To speed things up, tell us in a word what you need 🙂
Thanks for your message! We're currently closed and reopen [DAY/TIME]. Leave your request and your number and we'll call you back as soon as we open. If it's urgent, add "URGENT" and we'll do our best.
Great question! Our prices depend on the service. For a precise, free quote, just tell us: the type of need, your preferred date and your area. We'll come back with an estimate within 24 hours.
What it changes, trade by trade
The value of an auto-reply varies by activity. Three concrete examples that speak to most local businesses:
- For a plumber, the away message catches evening emergencies: the customer leaves their need and the tradesperson calls back at opening instead of losing the job to the emergency service next door.
- For a physiotherapist, the automatic greeting handles the flow of bookings and questions (hours, insurance, first session) without interrupting a consultation.
- For a beautician, the instant reply reassures a new client on availability and treatments before she even calls a competing salon.
The limit to know: fixed reply ≠ smart reply
This is the point most guides skip. The auto-reply in the free WhatsApp Business app is fixed: it sends the same text whatever the customer wrote. If a prospect asks "do you fix leaks on Sundays?", they get the same "we're closed" as someone who just wanted your opening hours. The message goes out, but the conversation doesn't move forward.
An AI agent on the API does something else entirely: it reads the message, understands the intent, replies specifically ("yes, we do emergency Sunday call-outs — can you give me your address and the nature of the leak?"), asks the useful questions and qualifies the prospect before handing over to a human. That's no longer an answering machine, but a first sales exchange run on its own. The gap is the same one between the app and the API: our comparison of WhatsApp Business API vs the free app shows where the line is crossed.
| Criterion | Fixed reply (free app) | AI agent (API) |
|---|---|---|
| Content | Always the same text | Adapted to each request |
| Understands the question | No | Yes |
| Asks follow-up questions | No | Yes, qualifies the prospect |
| Hands over to the team | No | Yes, with context |
| Reminders / follow-ups | No | Yes, scheduled |
| Price | Free | Software (from $89/month) |
How to turn on your auto-reply
In the WhatsApp Business app, it all happens under Settings → Business tools. There you'll find "Greeting message", "Away message" and "Quick replies". Turn them on, write your texts, set the away-message hours, and you're done. Budget ten minutes for a basic setup.
To go further — understand requests, qualify, follow up, connect a calendar and a CRM — you need the API and software to drive it. The good news: you keep your number, and a guided onboarding avoids any downtime. Our guide to WhatsApp customer service explains how to structure that shift without losing your speed of reply.
5 best practices for replies that convert
- Be human, not robotic. An emoji, a warm "hi" and a sign-off with your business name beat administrative-sounding text.
- Always ask for an action. Number, detail of the need, urgency: every reply should invite the customer to take a step forward.
- Promise a realistic time. "We'll get back within 24 hours" kept beats "instant reply" never honoured.
- Don't promise what you don't do. No automatic priced quote, no commitment the AI can't honour — the reply opens the conversation, it doesn't close the sale.
- Review every 3 months. Hours, offers, tone: an out-of-date auto-reply looks bad. Five minutes a quarter is enough.
With Reepli: from fixed reply to WhatsApp sales agent
Turning on a greeting message is good. But a fixed text doesn't qualify a prospect or fill your diary. Reepli.ai turns these replies into a real sales agent connected to WhatsApp:
- Reepli Essentiel — $89/month: the WhatsApp Conversation agent (which welcomes, understands the request, qualifies the prospect and hands real opportunities to your team) + the built-in CRM, with API access included.
- Optional agents — $45/month each: Appointments (automatic reminders and booking), Follow-up (unanswered quotes, dormant customers), Sales, Instagram and Google Reviews.
- Onboarding — $250 one-off: account verification, migration of your number and guided setup of your auto-replies.
One point that matters on the Google Reviews agent: Reepli.ai never replies for you. The AI suggests a draft reply for each new review, and you validate before publishing. The trial is free for 7 days, no card required, and the team answers any question at [email protected].
In short: start simple, scale up
Start by turning on the two basic replies in the app — greeting and away. In ten minutes, you already stop losing evening and weekend requests. Then, the day you realise how many opportunities still slip through for lack of a real reply, take the step to an AI agent: that's when the auto-reply stops being an answering machine and becomes a salesperson working for you around the clock. The right auto-reply doesn't just say "we're here" — it moves the sale forward.