For non-US people, Whatsapp became the default for people to talk with friends and family. Slowly, Whatsapp started becoming the way to talk to businesses such

For non-US people, Whatsapp became the default for people to talk with friends and family. Slowly, Whatsapp started becoming the way to talk to businesses such as ordering something or support. Then businesses started talking to each other on Whatsapp. Whatsapp cornered the talk outside of your company market. You have all your contacts on Whatsapp. Geo-niche chat apps such as iMessage in US, Line in Japan, Viber in certain eastern european countries fill the rest of the market. Next, Teams and Slack integrated calls and video chat directly and cornered the talk inside your company market.