WhatsApp gives businesses two ways in: the free WhatsApp Business app on your phone, and the WhatsApp Business Platform, usually reached through the Cloud API. They look similar from the customer’s side, but they work very differently once you have a team, a lot of customers or a reason to message people first. This guide compares the two in plain terms (costs, the 24-hour window, templates and team access) and helps you decide which one fits.
The short answer
- Choose the WhatsApp Business app if one or two people answer messages, most conversations start with the customer, and you’re happy working from a phone.
- Choose the WhatsApp Business Platform (Cloud API) if several people need to work the same number, you want to send order updates or campaigns to people who opted in, or you plan to automate replies at any real volume.
Many small businesses start on the app and move to the Platform when the team or the message volume grows. That’s a sensible path.
What the WhatsApp Business app is
The WhatsApp Business app is a free app for Android and iPhone, built for small businesses. It looks like regular WhatsApp with extra tools: a business profile, a catalogue, quick replies, labels, greeting and away messages.
It runs on a phone. Other team members can use it through linked devices (WhatsApp Web, desktop or a second phone), but the number of linked devices is limited and the main phone stays in charge. WhatsApp’s help centre explains how linked devices work.
What the WhatsApp Business Platform (Cloud API) is
The WhatsApp Business Platform is Meta’s set of business messaging APIs. The Cloud API is the version Meta hosts for you. There’s no app to install: you connect the number to software, either your own or a tool built by a Meta partner, and that software sends and receives messages.
Meta describes two ways to get started on its Business Platform page: through a partner that handles setup with little or no code, or by integrating directly with your own developers. Most small and mid-sized teams use a partner tool.
WhatsApp Business app vs API: side by side
| WhatsApp Business app | WhatsApp Business Platform (Cloud API) | |
|---|---|---|
| Where you use it | On a phone, plus a limited number of linked devices | In any connected tool or your own software |
| Cost | Free app | Charged per delivered message, by category and country (some messages free) |
| Team access | A few linked devices sharing one account | Built for many people, with assignment and routing in your tool |
| Messaging first | Broadcast lists to contacts who saved your number | Approved message templates to people who opted in |
| Automation | Greeting, away and quick replies | Full automation through your tool or code |
| Setup | Download and verify your number | Connect through a partner or developer, with a Meta business portfolio |
How costs work
The WhatsApp Business app is free to download and use.
The WhatsApp Business Platform charges per message. According to Meta’s pricing documentation:
- Meta moved to per-message pricing on 1 July 2025, replacing the older per-conversation model.
- You pay for delivered messages your business sends. Messages customers send to you are free.
- Rates depend on the message category (marketing, utility, authentication or service) and the recipient’s country code.
- Service messages (free-form replies inside the customer service window) have been free since November 2024. From 1 October 2026, Meta’s docs describe a monthly free tier of 1,000 delivered service messages per business number, with charges beyond that, and charging resumes for utility templates sent inside the window.
Prices and free allowances change, so treat any number you see in a blog post (including this one) as a snapshot. Check Meta’s pricing page before you budget. If you use a partner tool, add its subscription on top. Open Motives, for example, bills per workspace rather than per seat, and Meta’s message charges are separate.
The 24-hour customer service window, explained
This is the rule that shapes everything on the Platform.
When a customer messages you, a 24-hour customer service window opens. Inside it, you can reply with normal free-form messages: text, images, buttons and so on. Each new message from the customer resets the window to another 24 hours.
When the window closes, you can only start the conversation again with an approved message template.
Here’s how it plays out at Kettle & Co. Hira messages on Tuesday morning: “Do you deliver to Riverside today? I’d like 2 boxes of cardamom buns.” The team replies, takes the order and confirms delivery, all free-form, all inside the window. On Thursday, the bakery wants to tell her that buns are back for autumn. The window closed long ago, so that message has to be a template, and because it’s promotional, it’s a marketing template.
The WhatsApp Business app doesn’t have the same window. You can message anyone who has saved your number, though WhatsApp’s Business Messaging Policy still expects you to have their permission and to respect opt-outs.
Message templates: what they are and when you need them
A message template is a pre-written message that Meta reviews before you can send it. Templates can include variables (a name, an order number, a time) and buttons.
Meta’s template guidelines set out the basics:
- Every template has a category: marketing, utility or authentication. The category affects the price, and miscategorised templates can be rejected or recategorised.
- Only approved templates can be sent. Templates are reviewed when you create or edit them.
- Status can change later. If people block or report your messages, a template’s quality and status can drop.
A few practical tips:
- Keep utility templates truly useful. “Your order #1042 is ready for collection” is utility. Adding “and try our new sourdough!” makes it marketing.
- Get opt-in first. The Business Messaging Policy requires permission before you message someone, and recommends separate opt-ins for different types of message.
- Write fewer, better templates. A handful of well-tested templates beats dozens nobody maintains.
Multi-agent: how teams share one number
With the app, a small team can share the account through linked devices. It works for two or three people, but there’s no assignment, no way to see who’s handling what, and everyone sees everything.
With the Platform, the number connects to software, so the number of people who can work it depends on your tool rather than on WhatsApp’s device limit. In a shared inbox you can assign conversations, leave internal notes, route by skill or shift and track response times. That’s usually the real reason growing teams move to the Platform. You can read more about working WhatsApp as a team on our shared inbox page.
Can you use both on the same number?
Meta now offers a “coexistence” option that lets a business keep using the WhatsApp Business app on its phone while also connecting the same number to the Cloud API through a partner. Meta’s coexistence onboarding docs list the details. Some app features, such as group chats and broadcast lists, aren’t supported on the API side, and history sync has limits. Whether you can use it depends on your partner, so ask before you plan around it.
QR-linked or Cloud API: which to choose in Open Motives
Open Motives supports two ways to connect WhatsApp, and they suit different situations.
QR-linked connects your existing WhatsApp number by scanning a QR code from your phone, much like linking WhatsApp Web. It’s quick, there’s no Meta business verification step, and your number keeps working in the app on your phone. It suits:
- Very small teams who want WhatsApp in the same inbox as Instagram and Messenger
- Conversations that customers start
- Trying things out before committing to the Platform
Bear in mind that a QR-linked number is still a linked device of the app. Your phone needs to stay active (WhatsApp asks you to open the app on your main phone regularly to keep linked devices connected), and the app’s limits and WhatsApp’s rules on bulk or unsolicited messaging still apply.
Cloud API connects your number to the official WhatsApp Business Platform. It suits:
- Teams of any size working one number
- Order updates, reminders and campaigns using approved WhatsApp templates
- Broadcasts and drip campaigns to contacts who opted in
- Click-to-WhatsApp ads, with chats tagged by the ad they came from
- Workflows and an AI Employee answering routine questions at volume
If you expect to grow, or you plan to message customers first, start on the Cloud API. It’s the route Meta built for business messaging at scale.
A quick decision checklist
Answer these five questions:
- Will more than two people answer WhatsApp messages? Yes → Cloud API
- Do you need to message customers more than 24 hours after they last wrote? Yes → Cloud API
- Do you plan to automate replies or connect WhatsApp to other systems? Yes → Cloud API
- Do you want to try a shared inbox this week without a verification process? Yes → QR-linked to start
- Is WhatsApp a small side channel, with a handful of chats a day? Yes → the app or QR-linked is fine
Frequently asked questions
Is the WhatsApp Business API free?
Not entirely. Meta charges per delivered message on the WhatsApp Business Platform, based on the message category and the recipient’s country, though messages customers send you are free and some replies are free or included in a monthly allowance. Check Meta’s pricing page for current rates.
Can I use the same number on the WhatsApp Business app and the API?
Yes, through Meta’s coexistence option, if your partner supports it. You keep the app on your phone while the Cloud API runs alongside it, with some features, such as group chats and broadcast lists, unavailable on the API side.
Do I need a developer to use the WhatsApp Cloud API?
No. Most businesses connect through a partner tool that handles setup with little or no code. You only need developers if you want to build your own integration directly on the API.
What happens if a customer doesn’t reply within 24 hours?
The customer service window closes, and on the Business Platform you can only restart the conversation with an approved message template. As soon as the customer replies, a new 24-hour window opens.
Wrapping up
The WhatsApp Business app is a good, free starting point for a business with one or two people on the phone. The Business Platform is the right move once you need a team on one number, messages you send first, or automation you can trust. Pick based on where you’ll be in six months, not just where you are today.
Want to see both connection options side by side? Talk to our team.