Avochato - Text messaging for your business.
Salesmsg - Salesmsg is a simple tool that gives businesses an easy way to text their contacts online from local phone numbers.
Postscript - Like Mailchimp for SMS
Group Texting - Group Texting provides your business with a robust Group texting software that supports up to 10-digits numbers.
GetChat.App - Add WhatsApp chat to your website for free
Fastsms - Fastsms helps you with marketing by providing business text messaging which you can use to send information regarding discounts and delivery details to customers.