Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
MessageBird Chat API - Connect with your customers through different messaging apps
BotTalk - Create Alexa skills and Google Assistant actions with Markup
PHLO by PLIVO - Visually integrate Voice and SMS into your apps in minutes.
OK Google - Explore over 150 Google Now voice commands in one place
Voiceflow - Build voice apps in your browser without coding