Sending SMS messages via a mobile carrier may involve a charge. Some carriers also charge for receiving SMS messages. These costs can add up, depending on factors like the text volume, message type, countries sent to (or received from), price per message, etc. With an SMS API provider you can send SMSes to customers in dozens of countries at a much lower rate than you would with regular carrier-based SMS. Gupshup offers pay-as-you-go pricing so you only pay for what you use with full transparency and full flexibility. You can send local and international messages, SMS to toll-free numbers, and more. All messages are sent programmatically, and the API is easy to set up, enabling rapid go live.