MessageBird Chat API - Connect with your customers through different messaging apps
ShoutOUT - All in one business texting tool to send personalized alerts, promotions, reminders, short links and marketing campaigns, for any SMEs (hotels, restaurants, education, non profits, Woocommerce, banks, healthcare, agencies, supermarkets, weddings)
Voiceflow - Build voice apps in your browser without coding
Trumpia - SMS Marketing and Marketing Automation software for Mass SMS, internal communications & emergency alerts. #1 Text Messaging Service used by Fortune 500s.
Twilio Notify - One API to orchestrate notifications across SMS, push & more
Clickatell - Simple, reliable mobile messaging cloud.