HelpStack - Open Source mobile help framework to support iOS and Android app users.
IBM Watson Assistant - Watson Assistant is an AI assistant for business.
Chat Center - Chat with one click, no matter what messaging app you use
Zendesk Answer Bot - Chatbots
Helpshift - Helpshift is an in-game customer support platform that enables mobile apps to improve customer experience, drive higher ratings and increase retention.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.