How to Build a WhatsApp Chatbot
Updated
Quick answer: To build a WhatsApp chatbot, connect your number to the WhatsApp Business API, open a no-code flow builder such as Advertz's, and create a flow: a welcome message with buttons, branches for your most common questions, and a hand-off to a human agent. Then add an AI fallback trained on your FAQs and documents for questions the flow does not cover, test it, and publish. Most businesses can launch a useful bot in an afternoon.
From a blank flow to a bot that answers customers 24/7 — without writing code.
A good WhatsApp chatbot does not try to answer everything. It handles the repetitive questions instantly and passes the rest to a person with the full context.
- No-code visual flow builder
- AI answers from your own knowledge base
- Hand-off to a human at any point
Step-by-step
- List your top 10 questions. Read recent chats and write down what customers ask most — prices, timings, delivery, order status.
- Create a welcome flow. Start with a greeting and 3 buttons that cover most needs, for example Products, Order status, Talk to us.
- Build a branch per question. Use text, images, lists and buttons; add conditions and delays where needed.
- Add the AI fallback. Upload your FAQs, price list and policies so the AI can answer anything outside the flow.
- Add a human hand-off. Let customers type "agent" or tap a button to reach your team in the shared inbox.
- Test and publish. Try every branch in test mode, then publish and review conversations weekly.
Flow bot vs AI bot
| Flow (rule-based) | AI chatbot | |
|---|---|---|
| Best for | Fixed paths: menus, booking, order status | Open questions in the customer's own words |
| Answers | Exactly what you wrote | Generated from your knowledge base |
| Setup | Design each step | Upload documents and set guardrails |
| Recommended | Use both: flows for structure, AI for everything else |
Common mistakes
- No way to reach a human — always offer a hand-off
- Too many buttons — keep each step to three choices
- Letting the AI guess — give it your real prices and policies, and tell it what not to answer
Frequently asked questions
Can I build a WhatsApp chatbot without coding?
Yes. No-code flow builders like Advertz's let you design the bot visually with buttons, lists and conditions, and add an AI that answers from your own documents.
Is a WhatsApp chatbot free?
Replies inside the 24-hour customer service window are free from Meta. You pay for the chatbot platform; Advertz includes the AI chatbot from its Launch plan.