MessageBird Chat API - Connect with your customers through different messaging apps
Zendesk Answer Bot - Chatbots
Twilio Flex - The programmable contact center platform 📱
Aivo - Skyrocket your Customer Service and Sales KPIs with a Chatbot powered by Artificial Intelligence. Give time back to people.
Twilio Notify - One API to orchestrate notifications across SMS, push & more
Tars - TARS enables users to create chatbots that replaces regular old webforms.