BSG is described as 'cutting-edge bulk SMS platform that lets users send the unlimited number of text messages worldwide. It can be used both for transactional and promotional SMS sending' and is an app in the Social & Communications category. There are more than 10 alternatives to BSG for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Android Tablet. The best alternative is Bulletin Messenger. It's not free, so if you're looking for a free alternative, you could try textPlus or Talkatone. Other great apps like BSG are TextMagic (Paid), KAPSYSTEM (Paid), Textable (Paid) and BudgetSMS.net (Freemium).
Talkatone gives you free calls, text messages, real-time location sharing and picture sharing to Facebook and Google friends, or any phone number in US. Talkatone can replace your native phone to call and text for free without using cell minutes.
Textable is an app that allows businesses to text their customers via SMS. They provide you with a dedicated number you can share with your customers, the ability to send out mass messages, and automated messages for your frequently asked questions.