WhatsApp Broadcast for Business in Sri Lanka: Broadcast Lists, Business Broadcasts and the API Compared

If you run a small business in Sri Lanka, there are days when you need to tell everyone the same thing at once. Maybe it’s new stock, your Avurudu holiday hours, or a reminder that this month’s classes start on Monday. Typing it out to 300 people one by one isn’t realistic, so you look for a WhatsApp broadcast.

WhatsApp gives businesses three ways to do this, and they work very differently. This guide explains each one in plain language, the limits WhatsApp itself sets, how to avoid getting your number restricted, and when it’s worth moving to the WhatsApp Business API.

What a WhatsApp broadcast actually is

A WhatsApp broadcast is one message sent to many people, where each person gets it as a normal one-to-one chat from you. Nobody sees who else received it, and when someone replies, the reply comes only to you. That’s the big difference from a WhatsApp group, where everyone sees everyone’s messages and numbers.

For a business, that privacy matters. Customers don’t want their number exposed to 200 strangers, and you don’t want one customer’s complaint landing in front of everyone else.

Option 1: Broadcast lists in the WhatsApp Business app

This is the free option most small businesses start with. You create a saved list of contacts on your phone and send them the same message whenever you like.

According to WhatsApp’s help centre, the rules are:

• Up to 256 contacts per list. You can create as many lists as you want.
• People must have saved your number. Only contacts who added your business number to their phone will receive the broadcast. Everyone else simply won’t get it, and you won’t be told.
• Phone only. Broadcast lists aren’t supported on WhatsApp Web, Windows or Mac.
• Replies arrive as separate chats, so one person still has to answer them all on one phone.

WhatsApp also notes that people in some countries may see a monthly broadcast limit, which is rolling out gradually.

Broadcast lists are fine for a tuition class with 80 students or a clinic with a short list of regular patients. They get painful once your list grows, several staff need to reply, or many customers never saved your number.

Option 2: Business broadcasts and marketing messages in the app

WhatsApp has started letting businesses send paid broadcasts from inside the WhatsApp Business app. Depending on your country, this appears as “marketing messages” or “business broadcasts”. The main benefit is reach: these messages can go to customers who haven’t saved your number. You can also add a button customers can tap and schedule the send for later.

There are two catches. First, WhatsApp says this feature is available only in a limited number of countries, so check your app before you plan around it, because it may not be switched on for Sri Lankan accounts yet. Second, these messages are paid, so you’re trading the free broadcast list for wider reach at a cost.

Option 3: Broadcast campaigns through the WhatsApp Business API

The WhatsApp Business API (Meta calls it the WhatsApp Business Platform) is built for businesses that message customers at scale. Instead of a phone, you send through software that’s connected to your number.

A broadcast campaign through the API works like this:

1. You collect opt-ins. Customers agree to receive messages from you, for example through a checkbox at checkout, a form on your website, or by messaging you first.
2. You write a message template. Marketing and update messages sent outside a live conversation must use a template that Meta reviews before you can use it.
3. You choose an audience and schedule the send. Lists can come from your customer records or your online store, rather than your phone’s contacts.
4. Replies land in a shared inbox, so more than one person can answer, and conversations can be assigned and labelled.

Because the messages come from a system, the API can also send updates automatically, such as order confirmations or appointment reminders, alongside your occasional promotional broadcast.

The API isn’t free. Meta charges per delivered message, and your provider charges for setup and the software. We’ve broken down how that works in our guide to WhatsApp Business API pricing in Sri Lanka, so we won’t repeat the rates here.

The three options side by side

	Broadcast list (app)	Business broadcasts (app)	API campaigns
Cost	Free	Paid per message	Paid per message plus setup
Who receives it	Only contacts who saved your number	Can reach customers who haven’t saved it	Customers who opted in
Audience size	256 per list	Set in the app	Built from your customer data
Who replies	One phone	One app	A shared team inbox
Available in Sri Lanka	Yes	Check your app	Yes, subject to account approval
Best for	Small, loyal lists	Wider reach without new software	Growing businesses and regular campaigns

How to broadcast without getting your number restricted

Whichever option you use, WhatsApp watches how people react. If a large number of recipients block or report your business, WhatsApp says you’ll get a warning first. If it keeps happening, business broadcasts are suspended for three days, and repeat problems can lead to longer suspensions. On the API, poor feedback can limit how many messages you’re allowed to send.

These habits keep you safe:

• Only message people who said yes. Tell them what they’ll get, such as order updates, offers or reminders, and keep to it.
• Make leaving easy. Add a simple line like “Reply STOP to stop these messages”, and honour it straight away.
• Keep it relevant. A furniture showroom’s customers want new arrivals, not five messages a week.
• Clean your list. Remove people who haven’t interacted with you in a long time.
• Don’t blast everyone again right after a restriction ends. Start small.

Five broadcast ideas for Sri Lankan small businesses

1. Festival hours and greetings. Opening hours around Avurudu, Vesak, Deepavali or Christmas, with a short greeting. Keep it to one message.
2. New stock or new services. A short note with one photo and a link to the item, sent only to customers who asked to hear about new arrivals.
3. Appointment and class reminders. Clinics, salons, tuition classes and training institutes can cut no-shows with a reminder the day before.
4. Service due reminders. Vehicle service centres, AC servicing and water purifier companies can remind customers when their next service is due.
5. Delivery and order updates. Online stores can confirm the order and share the dispatch date. Through the API these go out automatically and count as update messages rather than marketing.

A good rule is one clear message, one action, and a reason the customer will be glad they got it.

When it’s time to move to the API

The free broadcast list is the right choice for many small businesses. Consider the API when most of these are true:

• Your customer list is well past a few hundred people.
• Many customers never save your number, so your broadcasts miss them.
• More than one person needs to answer replies from the same number.
• You want order, booking or payment updates to go out automatically from your website or system.
• You want to schedule campaigns and see who received and read them.

If you only tick one or two, stay on the app for now and build your opt-in list. That list is the most valuable thing you can bring to the API later.

How Digital Urgency can help

Digital Urgency WhatsApp API helps Sri Lankan businesses plan the move from the app to the WhatsApp Business Platform. We start by checking your number and account eligibility, then look at your opt-in process, the message templates you’ll need, and the systems you already use, such as your online store.

Packages come in Standard, Premium and Enterprise tiers, and the supported features are confirmed in writing before any work starts. Setup and management are quoted separately from Meta’s message charges, so you can see exactly what you’re paying for. Request a quote and tell us what you send today and who you send it to.

If many of your customers aren’t on WhatsApp, a text message campaign can fill the gap. Our guide to SMS marketing for small business covers that side.

Frequently asked questions

How many people can I send a WhatsApp broadcast to?
In the WhatsApp Business app, each broadcast list holds up to 256 contacts, and you can create as many lists as you need. Only people who saved your number receive it. Through the API, your audience comes from opted-in customer records instead of a phone list.

Why are some customers not receiving my broadcast message?
With broadcast lists, a customer must have your business number saved in their phone’s contacts. If they haven’t saved it, the message isn’t delivered. Ask regular customers to save your number, or use an option that doesn’t depend on saved contacts.

Is a WhatsApp broadcast the same as a WhatsApp group?
No. In a broadcast, each person receives your message privately and replies only to you. In a group, every member sees all messages and each other’s numbers, which most customers don’t want.