Avochato - Text messaging for your business.
ClickSend - ClickSend builds communication software and tools for businesses. We offer SMS, MMS, Voice, Email, Online Mail and even Fax. All accessed via our Dashboard, app, flexible API or integrations.
Postscript - Like Mailchimp for SMS
Infobip - A2P messaging platform for enterprises, resellers & mobile operators with global network coverage.
GetChat.App - Add WhatsApp chat to your website for free
Teckst - Teckst is a cloud-based SMS marketing tool and two-way texting solution designed for contact centers and customer service companies.