WhatsApp Chatbot for Business: Rules, Costs and Use Cases in 2026

Do you need the WhatsApp Business app or the API for a chatbot?

For an AI chatbot, you need the WhatsApp Business Platform, which is Meta's API. The free WhatsApp Business app remains a manual tool, built for replying yourself from your phone.

Which number you use, and how it runs, is decided during setup. Make that call early, especially if customers already know your number: the options Meta offers for an existing number change over time, so check them when the project starts.

How does the 24-hour window work?

Your chatbot can reply freely for 24 hours after each customer message. According to Meta's documentation, this customer service window opens when the user messages you and resets to 24 hours with every new message.

Outside that window, only message templates can be sent. These are pre-written messages submitted to Meta, in three categories:

1. Utility: order confirmation, appointment reminder, delivery update.
2. Authentication: one-time login code.
3. Marketing: promotion, new product, sales follow-up.

For a customer service chatbot, this is rarely a problem: the customer writes and the chatbot answers right away. Templates are mostly for notifications you send on your own initiative.

How much does Meta charge for WhatsApp messages?

Since July 1, 2025, Meta charges per delivered message rather than per conversation. The price depends on the message category and the recipient's country, according to Meta's pricing page.

What to know as of October 2026:

• messages your customers send you are free;
• templates (marketing, utility, authentication) are charged on delivery;
• free-form replies, called service messages, come with a free tier of 1,000 delivered messages per month per phone number since October 1, 2026, and are charged beyond that;
• after a click on a Click to WhatsApp ad, a free window can stay open for up to 7 days.

Meta has changed this model several times in a short period. Before building a budget, check the current rates for your destination countries. An approved provider may also add its own subscription fees.

Does Meta still allow AI chatbots on WhatsApp?

Yes, for business chatbots. Since January 15, 2026, the WhatsApp Business Solution terms bar AI providers from distributing a general-purpose assistant as the main function, as TechCrunch reported.

Meta clarified that the rule targets assistants like ChatGPT or Perplexity, not businesses using AI for customer service. A chatbot that answers questions about your products, opening hours or an order is still allowed.

Best practice: keep the chatbot focused on your business and have it politely decline off-topic questions. That's also what separates a business chatbot from a general tool, as we explain in chatbot vs ChatGPT.

Do you need consent to message a customer on WhatsApp?

Yes, whenever you message first. Meta requires that the person has clearly agreed to receive your messages and knows which business they come from, according to its opt-in page.

In practice, plan for:

• an unchecked checkbox on your form or checkout page;
• your business name and the type of messages to expect;
• an easy way to stop messages, for example by replying STOP.

This consent doesn't replace GDPR rules: transparency, data minimization and retention periods. We cover those in our article on chatbot GDPR compliance.

Which use cases fit a small business?

The best use cases are the ones where customers already message you, or call with simple questions. WhatsApp is an everyday messaging app for many people, which makes it a natural customer service channel.

Typical examples:

• Retail and ecommerce: stock availability, order tracking, returns. See our article on the ecommerce chatbot.
• Restaurants and hospitality: opening hours, bookings, daily menu, allergens.
• Garages and trades: appointments, photos of an issue, quote callbacks.
• Practices and service firms: documents to bring, appointments, reminders.
• Real estate: questions about a property, scheduling viewings, screening applicants.

In multilingual markets like Belgium, language matters. An AI chatbot detects the customer's language and answers in English, French or Dutch with the same information. It can share its knowledge base with your website chatbot, so answers stay consistent everywhere.

When a request is complex or sensitive, the chatbot hands over to a team member, with the full history. Your team then replies from a shared inbox, not from a single phone.

How do you launch a WhatsApp chatbot without mistakes?

Start small with the most frequent questions, then expand. Here's the approach we follow:

1. Choose the number and check that it can move to the platform.
2. Get your business verified in Meta's Business Manager.
3. Prepare the knowledge: FAQs, opening hours, terms, catalog.
4. Write the templates you need (confirmation, reminder) and submit them to Meta.
5. Define handover rules to a person and the hours your team takes over.
6. Test and launch, tracking unanswered questions to improve the chatbot.

For the bigger picture of how an AI chatbot works, read our AI chatbot for business guide.

Take the next step

A well-scoped WhatsApp chatbot serves customers where they already are, in their language. Explore our AI chatbot service and try the live demo, which trains on your website; it's also among our AI demos. Free 30-minute consultation and a quote within 24-48 hours.