Textable is described as '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' and is an app in the Social & Communications category. There are more than 10 alternatives to Textable for a variety of platforms, including Online / Web-based, Android, iPhone, Windows and Linux. The best alternative is Bulletin Messenger. It's not free, so if you're looking for a free alternative, you could try textPlus or Jasmin SMS Gateway. Other great apps like Textable are Heymarket (Paid), Talkatone (Freemium), TextMagic (Paid) and Kannel (Free, Open Source).
Heymarket is a business text service for your team. They get a shared inbox for messaging with people outside your organization. The other party never has to install an app & gets SMS. Free 14-day trial on heymarket.com, the App Store, & Google Play.
Jasmin is a very complete open source SMS Gateway with many enterprise-class features such as: - SMPP Client / Server - HTTP Client / Server - Console-based configuration, no service restart required - Based on AMQP broker for store&forward mechanisms and other queuing...
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.
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.