SlickText - Slick Text provides businesses and organizations with an easy and affordable platform for text message marketing.
Avochato - Text messaging for your business.
SimpleTexting - SimpleTexting offers SMS and text marketing services for companies of all sizes.
Postscript - Like Mailchimp for SMS
Textmagic - The all-in-one solution for all your business texting needs - marketing campaigns, two-way SMS chats, reminders, notifications, and internal staff communication.
GetChat.App - Add WhatsApp chat to your website for free