MessageBird Chat API - Connect with your customers through different messaging apps
Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
Voiceflow - Build voice apps in your browser without coding
PHLO by PLIVO - Visually integrate Voice and SMS into your apps in minutes.
Jovo - 🗣 Build cross-platform apps for Alexa and Google Home
Alexa for Business - Using Amazon Alexa’s voice enabled devices for workplaces