Conversity - Easiest way to manage Facebook Messenger chats
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Slack with your Users - Speak to your app's users entirely within Slack
Carrd - Simple, responsive one-page site creator.
Talkus - Chat with your website users from Slack
Message.io - Make your chat bots cross-platform