WhatsApp offers businesses two products with almost the same name: the WhatsApp Business app and the WhatsApp Business API (officially the WhatsApp Business Platform). They're built for different stages of a business. Picking the wrong one either costs you money you don't need to spend, or costs you customers you can't reply to in time.
The short answer
- Use the WhatsApp Business app if one or two people answer customers from a phone, you send updates to a few hundred people, and you don't need automation or integrations. It's free.
- Use the WhatsApp Business API if several people need to reply from one number, you want to message thousands of opted-in customers, or you want WhatsApp to work with your store, CRM or ads. You pay for software plus Meta's per-message rates.
Most businesses start on the app and move to the API when chats stop fitting on one phone.
Side by side
| WhatsApp Business app | WhatsApp Business API | |
|---|---|---|
| Cost | Free | Provider's software fee + Meta's per-message rates |
| Who replies | One phone plus a handful of linked devices | A whole team, each with their own login |
| Bulk messaging | Broadcast lists, which only reach contacts who saved your number | Approved templates to any opted-in customer, saved or not |
| Tracking | Basic message ticks | Delivered, read, replied and clicked, per campaign |
| Automation | Greeting, away and quick replies | Chatbots, lead qualification, follow-ups, triggers from other apps |
| Integrations | None | Shopify, Google Sheets, CRMs, webhooks, ads data |
| Starting a conversation | Any message, any time | Approved template outside the 24-hour window |
| Interface | The WhatsApp app | A platform from a provider (or your own build) |
| Chat history | Lives on the device | Belongs to the business, in one shared inbox |
What the WhatsApp Business app does well
The app is a genuinely good product, and for many small businesses it's enough:
- It's free and takes minutes to set up.
- Business profile: address, hours, catalogue and a description. Our free bio generator can help you write one.
- Quick replies, greeting and away messages for common questions. You can copy ready-made ones from our message templates.
- Labels to organise chats.
- Click-to-chat links and QR codes so customers can reach you. You can make one with our link generator.
If that covers how you work, stay on the app.
Signs you've outgrown the app
Most businesses move when one of these starts happening:
- One person holds the phone and everyone else waits. Teammates ask for screenshots, or customers wait until that person is free.
- Two people reply to the same customer, or nobody does. Without assignment there's no clear owner for a chat.
- Chats go unanswered after hours or on busy days, and you're losing sales because of it.
- Your customer list has outgrown broadcast lists. Broadcasts only reach people who saved your number, and you can't see who read what.
- You're copying data between WhatsApp and your store or spreadsheet, typing order updates by hand or pasting leads into Google Sheets.
- You run click-to-WhatsApp ads and can't reply to every lead fast enough.
- You're tempted by a "bulk sender" tool. Don't. Those tools automate a normal WhatsApp account, which breaks WhatsApp's terms, and they're the most common reason business numbers get banned. The API is the official way to send at scale.
What changes when you move to the API
Your whole team on one number
Everyone replies from the same WhatsApp number, from their own login. Chats can be assigned, and teammates can leave internal notes the customer never sees. When someone's off, the chat history is still there. See how a WhatsApp team inbox works.
Campaigns to every opted-in customer
You can send approved template messages, with images, documents and buttons, to customers who opted in, whether or not they saved your number. You can schedule campaigns or repeat them, and see who received, read and replied. More on bulk messaging through the official API.
Automation and integrations
Reply instantly to ad leads, ask qualifying questions, send order and cart updates from Shopify, sync contacts with Google Sheets, and hand over to a person when needed. See WhatsApp automation.
A few rules to know
- Templates for the first message. To message a customer who hasn't written to you in the last 24 hours, you need a Meta-approved template. Our template checker catches common rejection reasons before you submit.
- Opt-in is required. Only message customers who agreed to hear from you on WhatsApp, and honour opt-outs.
- Sending limits grow with quality. New numbers start with a lower daily limit on new conversations. It rises as customers engage with your messages and don't block or report you.
What the API costs
There are two parts: your provider's software fee, and Meta's per-message charges. In India, Meta charges ₹0.8631 per marketing message and ₹0.115 per utility or authentication message (before GST). Since 1 October 2026, replies inside the 24-hour window are also charged at the utility rate after 1,000 free each month. Messages customers send you are always free.
With Mywa, the software is ₹999/month with every feature and up to 5 team members, and Meta bills messages directly at its own rates with no markup. For a full breakdown with worked examples, read our WhatsApp Business API pricing guide for India.
Can you keep your number?
Yes. With WhatsApp's coexistence mode, a number already on the WhatsApp Business app can connect to the API and keep working in the app at the same time. Your contacts and recent chats come across, and messages appear in both places.
A number on personal WhatsApp is different: it has to be converted to the Business app, or removed from WhatsApp, before it can be connected.
How to move from the app to the API with Mywa
- Sign up at app.mywa.net.
- Connect your number through Meta's Embedded Signup, which opens inside Mywa: log in with Facebook, choose or create your WhatsApp Business Account, and verify the number with a code. Keep your existing app number with coexistence, or use a new one.
- Invite your team and choose what each person can see.
- Start replying from the shared inbox, then add templates, campaigns and automations as you need them.
It takes a few minutes, and you can cancel anytime.
The bottom line
The WhatsApp Business app is right while one person can comfortably handle your chats. Once a team shares the work, sends to thousands, or needs WhatsApp connected to the rest of the business, the API is the right tool. With coexistence, you don't even have to give up the app to switch.