Bulk SMS Messages Service is simply a means of sending a huge quantity of text messages to several recipients at once. This term is more typically used to describe SMS marketing texts than alerts or notifications. WhatsApp, on the other hand, has a lot of extra features that are helpful for business communication. It is a more flexible tool for information exchange because users can share documents, voice messages, photos, videos, and pictures in addition to text messages. WhatsApp offers two bulk messaging options: the WhatsApp Business App and the WhatsApp Business Platform (WhatsApp API), providing different business sizes and communications requirements. Businesses can also use a specialized business WhatsApp number to communicate with clients and customers more efficiently.