WhatsApp Chatbots for Business: How They Work, What They Cost, and the Rules

Related: Open-Weight LLMs vs API Models: Which Should Your Business Use?

In much of the world, WhatsApp is where customers already are. A chatbot there can answer questions, take bookings and send updates without asking anyone to download an app or visit a website.

It also comes with rules that shape exactly what you can build. Getting them wrong gets numbers restricted. Here is how it works.

Two different products

• WhatsApp Business app. Free. A phone app for small businesses. Quick replies, labels, a catalogue, simple greeting messages. It is built for people typing replies, not for automation.
• WhatsApp Business Platform. The API. This is what chatbots, integrations and automated messages run on. Meta hosts it as the Cloud API. You access it directly or through a Business Solution Provider.

A real chatbot means the Business Platform.

The 24-hour customer service window

This is the rule everything else depends on.

• When a customer messages you, a 24 hour window opens.
• Inside it, your bot can reply with any normal message: text, images, buttons, lists.
• Each new message from the customer restarts the 24 hours.
• Once it closes, you can only start a conversation with a template message.

Template messages

Templates are pre-written messages that Meta reviews before you can use them. They can include variables such as a name or an order number. There are three categories:

• Marketing. Offers, announcements, re-engagement.
• Utility. Order updates, appointment reminders, account alerts. Something the customer is expecting.
• Authentication. One time passcodes.

Categorise honestly. A promotion submitted as a utility message tends to get recategorised or rejected, and repeated misuse affects your account.

What it costs

Since July 2025, Meta charges per template message delivered. The rate depends on the template category and the country of the person receiving it. Marketing is the most expensive category.

What is not charged:

• Normal replies inside the 24 hour window
• Utility templates sent while a customer service window is already open

Rates vary a lot by country, so check Meta's current rate card for your market. On top of Meta's charges you may pay:

• A monthly or per message fee to your Business Solution Provider, if you use one
• Hosting for your bot
• AI model costs, if the bot uses an AI model to answer. See LLM API costs.

The practical effect: a bot that mostly answers customers who message first is cheap to run. A bot that mostly sends outbound marketing is not.

Consent and limits

• Opt-in is required before you send business-initiated messages. Collect it clearly, say what you will send, and keep a record.
• Opt-out must be easy. Honour "stop" immediately.
• Messaging limits. New numbers can only start template conversations with a limited number of customers per day. The limit rises as you send more with good quality.
• Quality rating. If people block or report your messages, your rating drops. A low rating can reduce your limits or restrict the number.

The single fastest way to damage a WhatsApp number is to send marketing to people who did not ask for it.

The rules on AI

Meta's WhatsApp Business terms were updated, effective January 2026, to bar general-purpose AI assistants from the Business Platform, meaning services where the AI chatbot itself is the product.

A bot that uses AI to support your own business is a different case. Answering questions about your products, taking bookings, and helping with orders remains allowed. Read the current terms before you build, because this area is still moving.

What good WhatsApp bots have in common

• Buttons and lists instead of free typing for anything with fixed options. Faster for customers, fewer misunderstandings.
• An obvious route to a person. "Talk to someone" should always work, with the conversation history passed along.
• Short messages. It is a chat, not an email.
• Clear hours. If people only answer from 9 to 6, the bot should say so.
• Connected to real systems, so "where is my order" returns the actual status rather than a link to a tracking page.

Common use cases

• Order status and delivery updates
• Appointment booking, reminders and rescheduling
• Answering the same twenty questions your staff answer every day
• Qualifying new enquiries before a person follows up
• Payment reminders and receipts

Before you start

1. Decide which phone number you will use. If it is already on the WhatsApp Business app, ask your provider how moving it works, since the options have changed over time.
2. Complete Meta business verification. Allow time for it.
3. Get your display name approved.
4. Draft your templates early. Review can take a while and rejections are common at first.
5. Plan the human handoff before the first message is sent.

We build WhatsApp bots connected to real business systems. If you are considering one, tell us what it needs to do. Also see adding an AI chatbot to your website.