Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Marketing Examples - A gallery of real world marketing case studies. Updated every day.
Drift - A messaging app that helps you grow your business.
Growth.Design Case Studies - Product tips… in a comic book format
SendBird - SendBird is messaging-as-a-service.
Brainiac - Database of 150 cognitive biases that control our decisions