Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Smallchat Beta - Slack integration for chatting with visitors to your website
Drift - A messaging app that helps you grow your business.
Firehose Chat - firehosechat.com
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
Speaklyn - Website visitors chat with you on Facebook Messenger