WhatsApp, on the other hand, provides received and read receipts

[basedataseo]

Some customers fall victim to scammers who message them impersonating a business.
While this is harder to prevent for SMS users, WhatsApp API users can claim authenticity by acquiring the WhatsApp green tick — provided that they meet the requirements.

Through WhatsApp API, businesses can also set up interactive responses to customer-initiated messages and interactive template messages to make customer communication more efficient, saving agents time.

This image shows a WhatsApp SMS comparison in terms of messaging list of new zealand whatsapp phone numbers features. One of the main difference between SMS and message with WhatsApp is SMS lacks plenty of messaging features WhatsApp has.
There is no way to know whether SMS recipients have read your messages or not. to let agents know if they should re-engage with the customer or let things be.

When it comes to security, WhatsApp provides end-to-end encryption, which means that messages are encrypted before being sent and can only be decrypted by the recipient.

In addition, WhatsApp uses two-factor authentication to help protect user accounts from unauthorized access. Unfortunately, SMS messages are not encrypted, which means that anyone with access to the network can intercept and read the messages.