Twilio Flex - The programmable contact center platform 📱
Zendesk Answer Bot - Chatbots
MessageBird Chat API - Connect with your customers through different messaging apps
Aivo - Skyrocket your Customer Service and Sales KPIs with a Chatbot powered by Artificial Intelligence. Give time back to people.
MessageBird API on StdLib - Purchase numbers, send SMS and more with one line of code
Tars - TARS enables users to create chatbots that replaces regular old webforms.