Heymarket - The professional way to text message. Your customers are mobile. Heymarket helps you manage those relationships from your smartphone.
Avochato - Text messaging for your business.
SimplyCast - All-in-one platform that allows you to discover, organize, and communicate with your leads over all the channels of communication
Message Me - Website to create your contact business card
Slack with your Users - Speak to your app's users entirely within Slack
EZ Texting - EZ Texting provides SMS marketing solutions to businesses of all sizes.