SMS APIs are becoming increasingly popular among developers due to their reliability and ease of use, making them an ideal choice for sending short, important messages to users. Courier, a full-fledged notification platform, offers extra functionality beyond basic SMS APIs by integrating with other types of notification channels like email, chat, and push notifications. It provides advanced features such as trigger-based sending, user notification preferences recording, and internationalization options. Choosing the right SMS API provider requires careful consideration of factors like price, ease of use, quality of developer support, and the number of notifications needed to be sent. Courier offers a simple way for developers to manage their SMS strategy, making it an attractive option for companies looking to enhance their notification strategy involving multiple channels.