Customer service on WhatsApp, without living on your phone

Why WhatsApp raises the bar

A customer who writes to you on WhatsApp isn’t filling in a contact form. They are in the same app they use with their family, and they judge your reply at that pace. An email answered the next morning feels normal. A WhatsApp answered the next morning feels like being ignored.

That doesn’t mean answering everything instantly. It means making promises about time that you can keep, and keeping them. Nobody publishes a reliable figure for ‘fast enough’ in a small business, and we won’t invent one. What follows are working rules, not survey results.

How fast to answer: three promises you can keep

1. In opening hours, a first reply within the hour. It doesn’t have to be the full answer: ‘Got it, I’ll check the diary and come back to you before 13:00’ is a good reply, as long as you do come back before 13:00.
2. Outside opening hours, an away message that says when you’ll answer and what to send in the meantime, so the morning reply can be a booking rather than a question.
3. No chat left read and unanswered. If the answer needs a colleague, say so. Silence after the blue ticks is what customers remember.

What to settle in writing

Writing wins for anything with a date, a time, a price or an address, because the customer will scroll back to find it.

• Bookings and changes. Always with the day and date, the time, who with and where. For example: ‘Booked ✓ Thursday 25 at 17:30 with Andrés at Fisio Centro. If you can’t come, tell us here 24 hours before and we’ll move it.’
• Prices and quotes, with what is included and what isn’t.
• Directions, parking and what to bring. Write these once as quick replies and reuse them.
• Your cancellation policy, in one line, before the customer needs it.

Three habits make written service faster. Answer the question in the first line. Ask one thing at a time. When there is a choice to make, offer two options (‘Thursday at 17:30 or Friday at 10:00?’), which can be answered in one word. And keep voice notes short: nobody can skim a three-minute audio or search it later.

When to pick up the phone instead

Some conversations get worse in writing:

• A complaint. After the second message, offer a call.
• Money in dispute. A refund, a charge the customer doesn’t recognise.
• Anything about someone’s health beyond the booking itself.
• Anything that three messages haven’t sorted out.

Ask before you ring: ‘Would it be easier if I call you in five minutes?’ Most people would rather be asked than rung out of the blue, and the offer alone often calms things down.

The app features that do the heavy lifting

The free WhatsApp Business app already covers the basics, and most of it is set up once:

• Quick replies, shortcuts you call up with ‘/’, up to 50, for the answers you type every day.
• Labels, up to 20, to see at a glance what is pending: ‘awaiting deposit’, ‘quote sent’, ‘call back’. WhatsApp is gradually turning them into ‘lists’.
• The greeting message, sent on first contact and after 14 days without one.
• The away message, tied to your business hours.

The last two are covered in WhatsApp Business auto reply, and the rest of the set-up in how to set up WhatsApp Business. If several people answer from linked devices, decide who owns WhatsApp on each shift. The app won’t share the chats out for you, so without a rule two people answer the same customer, or nobody does.

Keeping your evenings

The hardest part of WhatsApp customer service isn’t the replies. It is stopping. A few things help:

• Business hours in the profile and an away message outside them, saying when you’re back and asking for the service and preferred day.
• No replies at 23:00 ‘just this once’. The customer learns that you answer at 23:00.
• The phone’s focus or do-not-disturb settings to silence the Business app out of hours.
• Ten minutes first thing to clear the night’s messages before the first appointment.

If your WhatsApp runs on the Platform

Once a number is connected to software through the WhatsApp Business Platform, Meta’s Business Messaging Policy adds two rules. You can reply freely only within 24 hours of the customer’s last message; after that, only with templates Meta has approved. And you can use automation within that window, but only with prompt, clear and direct ways to reach a human, such as a transfer to a person in the chat, a phone number or an email address.

Replies inside the window are free until 30 September 2026. From 1 October, Meta charges for them after 1,000 free a month per number, at the utility rate of the customer’s country: £0.0159 for UK numbers on 23 September 2026. The detail is in how much WhatsApp Business costs.

When one phone isn’t enough

The signs are easy to spot: messages pile up while you’re with a customer, you answer at night, and bookings go to whoever replied first. At that point the rules above still apply, but someone has to follow them every minute of the day.

That is what Conserjía does on your own WhatsApp Business account: it replies in under a minute at any hour, books into your diary, says it is an AI in the first message and, when it doesn’t know, hands the conversation to a person with nothing left unanswered. Book a demo and bring a busy day of messages.