How to Build a WhatsApp Chatbot

Improved Engagement

Friendly, human-like messaging is a huge step up from skimming information off a webpage. Chatbots can mirror tone and simulate compassion. With light tweaking, they can be made to access the user’s activity/history for extra context, turning an otherwise dry interaction into a personalized exchange.

Packaging this workflow into a WhatsApp conversation keeps it comfy. Users don’t have to install an app or learn a new interface. They just chat.

More Sales Opportunities

Businesses using WhatsApp have reported a 45-60% conversion rate, compared to 2%-5% for email and SMS.

Why? Because recommendations in a conversational format feel more relevant. A WhatsApp chatbot can guide users through product discovery, answer questions in real time, and nudge them toward purchase — all in one flow.

Faster Customer Support

Chatbots are available 24/7, reply instantly, and don’t forget what they’ve been taught. This is vital when users expect immediate responses to their questions.

Lower Costs

Simple, repetitive questions don’t require human intervention. With 80% of customer support questions being standard, bots can keep your attention focused on the complex matters.

Retail Chatbot

A personal shopper need not be a person. Retail chatbots will handle customer engagement, all while driving business and converting leads. With product recommendations, order management, and checkout functionality, this use case goes beyond the passive problem solver.

FAQ and Customer Support

FAQ chatbots are great, since anything repetitive is well-suited for automation. FAQs usually live on a dry webpage anyway, so why not add a human flair?

Appointment Booking and Consultation

Can you think of a task more tedious and error-prone than booking meetings? I can say from experience that appointment booking agents have single-handedly saved me from constant double-bookings.

Offloading the back-and-forth to a bot is easy, reliable, and saves you from the headache of scheduling conflicts.

Lead Generation

On the topic of tedious-yet-sensitive tasks. Business owners can find themselves so busy trying to stay above water they can forget to focus on their bottom line: growth.

Lead generation bots take the edge off data collection and cold-calling. They keep track of customers’ needs and your goals, and execute in a friendly, conversational flow.

1. Define Your Use Case

Some use cases probably stood out more than others — especially in industries where chatbots are already flourishing. Decide what your business needs and take it from there.

2. Choose a Platform

You can get a bot up and running with little or no code in minutes using a chatbot platform. Here are a few popular options:

Botpress

A highly extensible platform for building AI-powered chatbots with numerous integrations – including WhatsApp.

• It features an intuitive visual builder with coding support for more advanced flows. 
• Integrations are quick and easy– setting up WhatsApp, Slack, Twilio, and others requires little setup.
• Resources like the Botpress Academy, video tutorials, and the Discord server guide you through the process of building, tweaking, and debugging.

Landbot

A simple no-code platform with a clean and drag-and-drop interface to design basic conversations.

• Great for quick iterations on lead capture, surveys, and simple workflows.
• However, Landbot’s NLP engine is limited, and might struggle with multi-turn conversations.
• Less flexibility for teams looking for custom flows.

Engati

An out-of-the-box platform that supports quick WhatsApp bot deployment.

• Easy to set up and beginner-friendly, with a visual builder and pre-built templates.
• Like with Landbot, it has pretty basic NLP capabilities and limited customization.

3. Create a Meta Business Portfolio

A WhatsApp business account is needed in order to send and receive messages from a bot. For that, you’ll need to create a Meta Business Portfolio. It will require a name and some web presence – either a website or a social media page.

4. Add a Knowledge Base

In nearly all cases, your bot is going to rely on information. This includes policies and FAQ, product inventories, customer data, and much more.

Clean, well-formatted documents make all the difference when it comes to building bots with RAG (retrieval-augmented generation) capabilities.

5. Determine the Flow

The goal of a bot – especially in the case of WhatsApp – is to make interactions feel like a chat, while remaining clear and effective. This is about personality and functionality.

6. Connect and Deploy to WhatsApp

We have a Meta Business Portfolio and a working chatbot, and now it’s time to connect the two.

To connect to WhatsApp:

1. Open your chatbot project and navigate to the studio

2. In the Home tab, scroll to Communication Channels

3. Select WhatsApp from the list of options.
4. Click Install Integration

5. Click Authorize WhatsApp

6. Follow the instructions in the pop-up window.

This will carry you through the process of connecting your Meta Business Portfolio and creating a WhatsApp Business Profile.

You’ll need a phone number that isn’t already linked to a WhatsApp account. If you don’t have one, WhatsApp can assign you a new number during setup — and it’ll work in production.

7. Hit Save Configuration.

That’s it! To deploy, you just need to hit Publish on the top-right corner of the studio.

 7. Iterate and Improve

Rome wasn’t built in a day (because they didn’t have chatbots).

You’ll surely run into quirks, mistakes, and inefficiencies. Fortunately, a good platform is highly customizable.

Some bots’ responses are unfocused. It could help to route queries to separate nodes.

Maybe you’re not crazy about your bot’s tone. A few sample greetings might help.

Monitoring performance and seeing how customers use the bot will be crucial to getting the most out of it. Fortunately the WhatsApp integration gives you the option to view past conversations.

You may notice that the bot deviates from the Knowledge Base in a long chat with multiple follow-ups. Looping to specific nodes can help with that.

The possibilities are endless: that’s a blessing, a challenge, and a solution.

Make Your Bot Personable

Bots don’t have to sound robotic. A little personality can go a long way towards user satisfaction.

• Use non-repetitive, friendly language: Stay away from scripted responses that feel stale.
• Match the speaker’s tone: If they’re casual, be casual. Short questions? Short answers. Some might be more verbose, follow suit.
• Make room for natural conversation: Allow backtracking, corrections, and clarifications.
• Don’t oversimplify: Avoid rigid yes/no flows that break when the user goes off-script.

Iterate, Iterate, Iterate

Your bot won’t be perfect out the gate. It’ll take some trial and error to get it right.

• Analyze past conversations to see where you can do better.
• Keep your knowledge base up to date as your business’ information changes.
• Update your flow logic as needed. Small tweaks can make big improvements.

Build and Maintain Trust

Users will trust your chatbot – if it earns it. A few best practices can make your bot feel reliable and safe.

• Keep it simple: Give users direct answers to questions, accurate information, and make sure the bot is transparent about what it can't do. Do your best to keep the bot from hallucinating (making up false information).
• Follow privacy and security practices: Make sure you comply with security and privacy regulations in your country and, in many cases, the countries of your users.  It helps to read up on compliance practices, such as building GDPR-compliant chatbots. Your best bet is to use a platform with robust built-in security measures.