MessageBird Chat API - Connect with your customers through different messaging apps
Voiceflow - Build voice apps in your browser without coding
Wavecell - Wavecell simplifies real-time cloud communications using SMS, Chat Apps, Video Interaction and Voice solutions.
Twilio Notify - One API to orchestrate notifications across SMS, push & more
Twilio - Brings voice and messaging to your web and mobile applications.
Jovo - 🗣 Build cross-platform apps for Alexa and Google Home