TextBlast Bulk SMS - Send personalized mass messages easily

WikiPro - All-in-one Business to Customer Communication

LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.

Text Groove - Text enable your existing business landline, VoIP, or toll free phone number and connect with your customers in a whole new way. Try Text Groove for free.

Porterhouse - Send mass iMessage and SMS texts from your existing number with a single click!

Heymarket - The professional way to text message. Your customers are mobile. Heymarket helps you manage those relationships from your smartphone.