WikiPro - All-in-one Business to Customer Communication
Heymarket - The professional way to text message. Your customers are mobile. Heymarket helps you manage those relationships from your smartphone.
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.
SimplyCast - All-in-one platform that allows you to discover, organize, and communicate with your leads over all the channels of communication
Avochato - Text messaging for your business.
Proximiti MessagePro - MessagePro services include business SMS, secure messaging, interactive messaging, BOTs, scheduled messaging, and fax. Solutions for SMB and enterprise.