Automatic messaging on WhatsApp: how to configure it by rules

Anyone who responds a lot on WhatsApp knows: the first response has to come out in seconds, but no one can spend 100% of the time on the screen. A automatic message on WhatsApp solves this by messaging the right text at the right time — without artificial intelligence, just with rules and triggers which you set once and leave running.

What is an automatic message on WhatsApp

An automatic message is a text sent alone when a condition occurs: a new message has arrived, it is outside business hours, the contact is awaiting assistance. It's not a robot that "thinks" — it's a simple rule like "if X happens, text Y." This distinction matters: you maintain full control over what is said, without surprises from an AI responding what it shouldn't. All the logic is in your hands, and every text that comes out was written and approved by you beforehand.

No set of quick answers you create the texts; In the automatic sending rules you decide when each one triggers. For flows with questions and keyword branches, the path is the chatbot by rules. For the operator, the practical advantage is enormous: the first response is never delayed, even when everyone is busy or the workday is over. A Harvard Business Review study showed that leads responded to within an hour are 7 times more likely to qualify than those who wait longer^[1] — and automatic messaging is the cheapest way to ensure that no one is left in the dark.

Why use automatic messaging in commerce

In commerce and services, WhatsApp has become the customer's gateway — Meta itself reports that most people prefer to speak to companies by message rather than by phone or email^[2]. The problem is that the volume does not respect the schedule: messages arrive at lunchtime, on the weekend and at eleven at night. Without automation, you either answer everything manually (impossible) or leave people waiting (expensive). The automatic commercial message creates a layer of courtesy that works 24 hours a day: confirms receipt, informs the deadline and holds expectations until a human takes over. The customer realizes that they have been noticed, and this reduces the chance of them looking for a competitor while they wait. Configured once, this network of rules now protects each incoming conversation, without any additional effort from the team.

Automatic message on WhatsApp Business

The WhatsApp Business application already features two native automations: greeting message (sent when someone writes for the first time or after 14 days without contact) and the away message (sent outside the time you set). They are useful and free, but they have limits: a single text per type, without variation by label, without combining with lunch hours and without running on the computer along with the rest of the service.

Automatic message on WhatsApp Web (business)

On WhatsApp Web, an extension like Zapext expands these rules. Instead of a single out-of-office text, you create several — one for after hours, another for lunch, another for the customer who asked to wait — and trigger each one according to the condition. All within the WhatsApp Web screen, without opening another program and at no cost per message.

Situation	Trigger (rule)	Example text
First contact	New message from new number	"Hello! We received your message and will be right with you."
Out of hours	Outside business hours	"Our service is from 9 am to 6 pm. We will respond as soon as we open."
Lunch time	Between 12pm and 1pm	"We're on lunch break, we'll be back at 1pm."
Wait for service	Contact in queue	"You're in line, in a moment an attendant takes over."

Automatic message by opening hours

The most common case is to notify when the company is closed. Define business hours (for example, Monday to Friday from 9am to 6pm) and register an after-hours text. Any message received outside this window receives a response automatically, making it clear when the customer will receive a response. This reduces the anxiety of those who write at 11pm and avoids the feeling of abandonment.

Automatic message at lunch time

A lot of people forget about this break. A specific rule for lunch time (12pm to 1pm, for example) warns that the team has eaten again and will return soon. It's more honest than leaving the person feeling like they've been ignored — and simpler than having to manually respond to every conversation that comes in between.

Message for the customer to wait for service

When there is a queue, a waiting message holds the customer. The ideal is to be specific: confirm that the message arrived, give a realistic estimate and, if possible, offer a self-service option. Combine this rule with labels to prioritize who has been waiting the longest. A phrase like "You're in line and in a few minutes an attendant takes over" works much better than silence because it makes the wait predictable rather than frustrating.

Difference between automatic message and quick replies

It is worth separating two concepts that are often confused. A automatic message sends messages on its own when a rule is satisfied — you don't need to be on screen. Already the quick reply is a shortcut that you activate manually, choosing the time to send. Both use ready-made texts, but what changes is the trigger: automatic is by rule, fast is by your hand. In practice, the best operations combine the two — automatic for greeting, absence, and time; quick answers to frequently asked questions that appear in the middle of the conversation. This way, you cover both predictable moments and everyday improvisations.

Common errors when configuring

Three errors appear frequently. The first is promising a deadline that is not met ("we respond in 5 minutes" at 10pm). The second is to leave the message too generic, without saying the actual opening hours. The third is to stack automations that fire together, causing the customer to receive three texts in a row. Each of these stumbles erodes trust. The golden rule is simple: promise little and deliver, be clear on schedules and never let the customer receive more than one automatic message per interaction.

Good practices to avoid looking like a robot

• Customize — use the contact name when the tool allows variable.
• Be honest on time — promise a return you can deliver.
• Do not oversend — one automatic message per situation is enough; repeating becomes spam.
• Review the texts — read it out loud to sound human, not bureaucratic.
• Keep control — since they are rules (and not AI), you know exactly what will be said.

Why Zapext

Zapext is a Chrome extension that runs within WhatsApp Web and is used by more than 3,000 Brazilian companies. Automatic messages work based on rules and triggers that you control, at no cost per message and with data saved locally on your computer. Plans range from R$29 to R$59/month, with up to 4 users on the Plus plan, and there is a 7-day guarantee to test without obligation. The extension is audited by the Chrome Web Store.

Sources

1. [1] The Short Life of Online Sales Leads — Harvard Business Review (2011-03). accessed 2026-05-19.
2. [2] How people use messaging to connect with businesses — Meta Newsroom (2024-01). accessed 2026-05-19.