What is WhatsApp Business? The app, the platform, and which one a seller needs

WhatsApp Business is WhatsApp's name for the ways a business can talk to customers on WhatsApp. For a seller, two of them matter. The WhatsApp Business app is a free app for one business number, which you use on your phone the way you use normal WhatsApp. The WhatsApp Business Platform, which developers call the WhatsApp API, is a paid service that lets software send and receive messages on a business number, usually through a vendor's inbox or chatbot. WhatsApp's own guide adds a third, ads on Facebook or Instagram that open a WhatsApp chat.

Most people searching "WhatsApp Business" want the first one. Most vendors selling "WhatsApp Business" are selling the second.

The Business app looks almost the same as the WhatsApp you already use. WhatsApp's features page lists what it adds:

• A business profile with your logo, a description, your opening hours and your website.
• A catalogue, so people can see what you sell without asking for photos.
• Quick replies, saved answers you send with a shortcut.
• Labels to sort chats, like "new enquiry" or "quote sent".
• A greeting message for someone writing for the first time, and an away message for after hours.

WhatsApp's own guide says the app is free to download and uses your phone's data or Wi-Fi like the normal app. It also says the app provides for one phone number, and points a larger business that needs many users on one number to the platform.

That one-number rule catches people out. One number can't run your personal WhatsApp and the Business app at the same time, so most sellers move their work chats to a second number.

The platform has no app of its own. It's the connection a piece of software uses to send and receive WhatsApp messages on your business number. You reach it through a vendor, and the vendor gives you the screen to work in: a shared inbox, a chatbot, broadcast tools or a CRM.

It's built for sending at scale. Order updates, appointment reminders to thousands of customers, and many agents answering one number all run on the platform.

It's also charged by message. Meta's pricing page says that since 1 July 2025 it charges per message for template messages delivered, the pre-approved messages a business sends to start or restart a conversation. Since 1 October 2026, replies inside a customer service window, which opens when the customer writes to you, are charged too once a number passes 1,000 a month. Rates depend on the kind of message and the customer's country, and the vendor usually adds its own subscription on top. Check Meta's page for current rates before you compare quotes.

Ask three questions:

1. How many people answer the chats? One person on one number is what the Business app is built for.
2. Do you start most conversations, or reply to them? Messaging hundreds of people who haven't written to you is platform work, with template messages and their charges. Replying to enquiries and following up with people you've spoken to is app work.
3. Do you need software to act on the chats? Automatic replies to every new lead, chats landing on a CRM record, reports on response time. Some tools do this by linking your number as a device, the way WhatsApp Web does, and some need the platform.

Between those two sits a common setup: a small team where each rep keeps their own number and the manager wants to see the chats. That can often be handled by linking each rep's number to a shared inbox as a device, the way WhatsApp Web works, without moving to the platform. Ask any vendor which of the two they use before you sign. Linking has a catch, too. WhatsApp's linked devices page warns that "linking your device through unofficial apps or websites may put your account at risk", so ask a vendor that links what it does to keep that risk down.

1. Decide which number the business will use. If it's your current number, back up your chats first.
2. Download WhatsApp Business from your phone's app store and register the number.
3. Fill in the business profile: name, category, address, hours, website.
4. Write three quick replies for the questions you answer most, such as price, availability and where to find you.
5. Set a greeting message and an away message with your working hours.
6. Add labels for the stages you care about, like "new", "quote sent" and "follow up".

Then share the number where people find you. A click-to-chat link on your website or name card opens a chat with you without them saving your number first; the WhatsApp link generator makes one with a QR code.

The Business app keeps chats tidy. It doesn't remember for you:

• A label says "follow up", but it won't tell you on Thursday that Thursday has arrived.
• Chats aren't a client record. What someone told you three months ago is somewhere up the thread.
• A manager can't see the team's chats, or who's waiting for a reply, without holding each phone.

That's where a CRM comes in. If you're weighing one up, What is a CRM? covers what goes in one, and the best WhatsApp CRM in Singapore compares six.

• WhatsApp for Business, The difference between WhatsApp and WhatsApp for Business: the free app, one phone number per app, and the platform for larger businesses, read 28 September 2026
• WhatsApp for Business, Business app features: profile, greeting and away messages, quick replies, labels, catalogue, and up to 10 linked devices and agents with Meta Verified, read 28 September 2026
• Meta for Developers, Pricing on the WhatsApp Business Platform: per-message charges for delivered template messages since 1 July 2025, and service messages past the free monthly tier since 1 October 2026, read 1 October 2026
• WhatsApp Help Center, About linked devices: linking through unofficial apps or websites may put your account at risk, read 28 September 2026