SMGS is described as 'SMS enterprise-class gateway interacting with multivendor SMSCs through dedicated ESME protocols including MPP,CIMD2,UCP etc .., as well as multiple SMS/WAP push proxy gateways or SMS gateways via TCP/IP'. There are seven alternatives to SMGS for a variety of platforms, including Windows, Online / Web-based, Android, iPhone and Blackberry. The best alternative is XendApp, which is free. Other great apps like SMGS are Swift SMS Gateway (Paid), Targlets.com (Paid), IndiaSmsWala (Paid) and Ozeki NG SMS Gateway (Paid).
XendApp provides a messaging gateway for reaching public or internal users through applications for a variety of devices. Messages can be sent directly from http://xendapp.com web site or through any of the existing web services that the web site have.
Bulk SMS or Bulk Messaging is used by companies, enterprises, banks, schools, and small businesses. Bulk SMS is used for sending sms (short message service) to mobile no. Bulk SMS is used as promotional sms for sms marketing.
Ozeki NG SMS Gateway is a powerful, reliable and flexible SMS Gateway application. It enables you to send/receive huge amount of SMS and MMS messages from Microsoft Windows-based computer to mobile devices.