SMS vs WhatsApp: How do you decide which messaging channel to use?
While businesses have many ways to interact with customers, that doesn’t mean these options are easy to manage. A large part of the SMS vs. WhatsApp debate centers on practical questions, such as who you are trying to message. How urgent is the message? And, what do your customers tend to use?
While these two channels can work in every situation, each channel has its strengths. SMS is well-suited for sending time-sensitive messages, whether the recipient is online or offline. WhatsApp is great when you want to have more engaging conversations. It ultimately depends on business goals, the message, the recipient, and the call to action you want to have.
How to Choose Between SMS and WhatsApp for Business Messaging
While weighing out the options between short message service (SMS) and WhatsApp for business messaging, you should consider reach, message type, and consumer expectations.
1. Reach: How Many Customers Can You Actually Contact?
SMS has one advantage over WhatsApp: it does not require mobile data, an app, or an account to receive messages.
With more than two billion users worldwide, WhatsApp is the messaging app used by people in Europe, Latin America, and many parts of Africa. However, in the United States, WhatsApp is not as popular, and people rely on SMS.
When deciding between SMS and WhatsApp, consider the geographic location of the consumers. The bank will likely use SMS to send fraud alerts to all customers, regardless of location. However, for a Western European fashion brand targeting younger consumers, WhatsApp may be a more effective channel.
2. Message Type: Quick Alert or Actual Conversation?
The second factor is what you’re actually trying to say.
SMS is built for short, direct, and urgent messages like:
- One-time passwords (OTP)
- Delivery updates
- Appointment reminders
- Emergency alerts
These are messages that need to be seen immediately, without requiring the user to do anything beyond a glance at their screen.
WhatsApp supports a lot more. Businesses can send:
- Images and videos
- Product catalogs
- Quick reply button
- Full back-and-forth customer conversations
WhatsApp vs. SMS marketing discussions usually end with WhatsApp as the winner for engaging or visual content. A travel agency, for instance, might send an sms booking confirmation, but use WhatsApp for destination photos, packing tips, and customer queries all in one thread.
3. Cost and the Rules Around Messaging
Pricing works differently on each platform. SMS costs depend on the destination country, the carrier route, and how long the message is. WhatsApp pricing through the Business API is conversation-based. You pay per conversation window, whether the business or the customer initiated it. Additionally, WhatsApp marketing messages require pre-approved templates.
Many companies decide to use both channels rather than pick one, and this is exactly why. Some platforms let users manage SMS and WhatsApp messages from a single app, making it easier to use both channels.
Major Differences Between SMS and WhatsApp Messaging
Diving into the core differences helps clarify the SMS and WhatsApp messaging question.
Message Delivery Reliability
If mobile data is unavailable or spotty, the SMS may still go through because SMS uses mobile data rather than the internet, and WhatsApp requires mobile data or Wi-Fi to work. SMS messaging is a more reliable channel for high-priority messages, such as security codes and payment confirmations.
Customer Engagement Rates
Engagement with WhatsApp messaging is higher because the interface is conversational and easy to respond to. Businesses can include clickable buttons and voice messages, and customers can also get product previews. This is one of the biggest reasons why WhatsApp is preferred over SMS for promotional messaging.
Despite WhatsApp being the preferred messaging service, SMS still has high engagement rates for promotional messages due to a high open rate, estimated at 90-98%. WhatsApp messaging encourages customers to stay engaged for longer. However, SMS facilitates fast message reading and response.
Customer Experience
Customer perception varies by channel. SMS is transactional, so people expect short messages such as updates, alerts, or reminders. They don’t expect a two-way conversation. Conversely, WhatsApp is more personal and conversational, so the users are much more likely to respond to various types of inquiries.
When Is SMS the Right Option?
Messages That Need to Be Read Fast
SMS is best when each second counts. Common use cases are:
- Notifications for banking fraud
- Security codes
- Updates for shipping and deliveries
- Reminders for appointments
These messages need to be clear and to the point.
Targeting a Large Audience
Since SMS does not need internet or a certain app, they can be sent to anyone. This makes SMS the best choice for things like government alerts, healthcare reminders, and any messages sent to a large group of people.
Industries That Need Compliance
Industries like healthcare, banking, and logistics have strict rules about how businesses can communicate with customers. SMS is the best way to communicate with customers while still complying with the rules. In these instances, the sms or WhatsApp for business chat is not very long. Reliability is the most important.
Advantages of WhatsApp
Chatbot Support
More and more companies are running full support operations through WhatsApp. Customers can ask questions, get updates, and resolve issues without switching channels. That kind of seamless, threaded experience isn’t something SMS is built for.
Marketing Campaigns With Rich Content
WhatsApp has a clear edge when the campaign includes visuals. Examples that work particularly well:
- Product launches with images or short videos
- Discount announcements with clickable buttons
- Event invitations with previews and RSVPs
- Cross-Border Communication
WhatsApp is often significantly cheaper than international SMS. For brands operating across multiple countries, the cost difference adds up quickly when weighing SMS vs. WhatsApp messaging at scale.
Use SMS as the Entry Point, WhatsApp for the Relationship
A good use case for both channels working in tandem is:
Use SMS for critical messages or opt-in confirmations; it’s great for initial contact and channel opening.
Use WhatsApp messages for further engagement, assistance, or additional resources.
For example, an SMS message that includes a delivery update and a link to a WhatsApp support chat, where customers can ask questions and find out next steps. One channel does the heavy lifting on reach; the other builds the relationship.
When managing large-scale communication, teams tend to prefer using both WhatsApp and SMS, rather than choosing a single channel.
Conclusion: Selecting a Relevant Messaging Strategy
The question isn’t which is better, SMS or WhatsApp, but rather which is best suited for the moment.
SMS is the most reliable channel for urgent and security messages, and for reaching the largest number of people. WhatsApp is best used when the goal is conversation, customer service, or interactive marketing.
More sophisticated businesses know how to use both. There is often no single right answer for SMS or WhatsApp for business messaging. The most effective businesses know how to use each appropriately.
FAQ
Is SMS more reliable than WhatsApp?
Yes. SMS is more reliable because messages are transmitted via cellular networks and don’t depend on internet connectivity, making it suitable for sending security codes or delivery confirmations.
Which is better for marketing, SMS or WhatsApp?
It depends on the type of marketing campaign being done. SMS can get marketing messages to customers faster. WhatsApp marketing is better for more engaging and interactive campaigns.
Should you use both SMS and WhatsApp?
Yes. Many businesses use SMS for sending notifications and confirmations, and WhatsApp to chat with customers and for more interactive marketing messages.
Is WhatsApp cheaper than SMS?
For messages being sent internationally, it is usually cheaper. However, the total cost depends on the number of messages sent and the message template used.
Which channel has more engagement?
Because of its text-based interface, WhatsApp can drive more engagement, while SMS can get more messages opened, though customers are less likely to respond or click.
