Jasmin SMS Gateway - Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as:
Smartclasses.in - Smartclasses.in is a leading cloud-based coaching class management and online learning platform that meets all the learners’ needs worldwide.
Kannel - Open Source WAP and SMS Gateway
Mtalkz - Mtalkz is a functional bulk SMS software that allows you to take your business fly with extensive support for WhatsApp API and chatbot automation.
Bulk SMS Services - Sending Bulk SMS to the customers will engage the customers with your business and new offers.
Proctur - Proctur is an advanced platform providing smarter ways to deal with the education centers by providing user-friendly coaching management software and mobile application.