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Growth systems
WhatsApp Business App or API: pick the right setup
When the free app is enough, when to move to the API, opt-in rules and what to automate first.
The short answer
Should you use the WhatsApp Business App or the API?
Use the free WhatsApp Business App while one person replies from one phone. Move to the WhatsApp Business Platform, usually called the API, when several people need to reply, you want automated replies and reminders, or you send broadcasts. With coexistence you can keep the phone app on the same number.
Business App
Free
One phone, one person.
For teams and automation
API
Through Meta's Cloud API.
Customer service window
24 hours
Free-form replies inside it.
Required for templates
Opt-in
And for staying unblocked.
The app works for one person
The WhatsApp Business App is free and fine when one person replies from one phone. It breaks when the team grows, the phone is with the receptionist, or you want automation.
The API is for teams and automation
The WhatsApp Business API puts your number on Meta's Cloud API. Several people reply from one inbox, and you can send approved templates, reminders and automated replies.
Opt-in matters
Only message people who agreed to hear from you. Collect opt-in on forms, at checkout or in the first chat, and honour stop requests immediately.
What to automate first
Start with instant replies and FAQs, booking confirmations and reminders, then follow-ups for leads who went quiet.
What is the difference between WhatsApp Business App and API?
The Business App is a free phone app for one business number, best when one person replies. The API, now called the WhatsApp Business Platform, connects your number to software so several people can reply, messages can be automated and approved templates can be sent at scale.
Is the WhatsApp Business API free?
The Platform itself doesn't have a fee from Meta, but Meta charges per template message, by category, and you usually pay for software to use it. Replies within 24 hours of a customer's message are free of Meta charges. Marketiism adds no markup on Meta's charges.
Can I use the API and the phone app on the same number?
Yes, with coexistence. A number already on the WhatsApp Business app can be connected to the Platform while the app keeps working on your phone. Chats and contacts sync, so your team can reply from a shared inbox and you can still answer from your phone.
What is the 24-hour customer service window?
When a customer messages you, a 24-hour window opens. Inside it, you can reply with normal messages, free of Meta charges. Outside it, you can only start a conversation with an approved template, which Meta charges for according to its category, such as marketing or utility.
What are WhatsApp message templates?
Templates are pre-approved message formats used to start conversations outside the 24-hour window, such as booking reminders, order updates or offers. Meta reviews each template, usually within minutes to a day, and categorises it as marketing, utility or authentication, which sets the price. Rejected templates can be edited and resubmitted.
Do customers need to opt in?
Yes. Meta's rules require that people have agreed to receive messages from your business before you send them templates. Collect opt-in on forms, at checkout or in the first chat, and honour stop requests straight away. Messaging people who never agreed gets numbers reported and restricted.
Can WhatsApp ban my business number?
Numbers get restricted when too many people block or report them, or when businesses break WhatsApp's policies. Message only people who opted in, keep messages relevant and infrequent, and watch your quality rating. Most businesses that follow these rules never have a problem. Your quality rating warns you early.
How many people can reply on the API?
As many as your software allows. In Marketiism, Starter includes two team members, Growth includes ten and Agency has no limit, each with their own login on the same number. Chats can be assigned, and you can see who replied to which customer. Owners can see every chat.
Can I send bulk messages on WhatsApp?
Yes, through the Platform, as broadcasts of approved templates to contacts who opted in. There are daily limits on how many people you can start conversations with, which grow as your number builds a good quality rating. Bulk messages to bought lists break the rules.
What should I automate first?
Instant replies to common questions, then booking and order confirmations and reminders, then follow-ups for leads who went quiet. Broadcasts come last, once the basics run smoothly. Each step should make customers' lives easier, not just send more messages. Measure each step's effect for a few weeks before you add the next one.
Do I need a Facebook account for the API?
You need a Meta business account, which can be created with a Facebook login during setup. Most providers, including Marketiism, use Meta's Connect with Facebook flow, so you approve access in Meta's own window. You don't share your password with anyone. The whole process takes a few minutes.
How long does it take to move to the API?
The connection itself can take an afternoon. Business verification with Meta, if needed, and template approvals can take a few days. Planning your first replies and templates in advance makes the switch smooth, so customers never notice anything except faster answers. Plan the switch for a quieter week if you can.
Is the green tick required?
No. The verified badge is optional and granted by Meta to some notable businesses; most small businesses run perfectly well without it. Customers care more about fast, helpful replies and a recognisable business name and profile photo than about a badge. A complete business profile on WhatsApp matters more.
Can the API work with my CRM?
Yes. In Marketiism, WhatsApp chats attach to contacts in the built-in CRM automatically, next to bookings and payments. With other CRMs, providers usually offer integrations or webhooks. Having chats and customer history in one place is a big part of the benefit. That's where the real time savings come from.
Should a one-person business switch to the API?
Not necessarily. If you're the only one replying, volume is low and you don't need automation, the free Business App may be enough. Switch when replies slip, you hire help, or you need reminders and follow-ups to run without you. Many owners switch the week they hire their first assistant.
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