If a customer sends your business a message, a 24-hour customer service window begins. During this 24-hour period, your business can send non-templated messages and utility template messages without incurring a cost.
Marketing and authentication template messages will be charged based on their category, regardless of whether they are sent within a customer service window. Note that, if sent outside of a customer service window, utility messages will also be charged.
For more information on customer service windows, click here.
Learn more about how you can use the Sinch WhatsApp Business API to send messages easily and securely.
