(On all devices)

Population of the World: 8Bn

People having access to either smartphone or laptop: 60%= 4.8Bn

People having access to the internet: 60% = 2.8Bn

Slack is mostly used by the working population considering that 50% of the population= 1.4Bn

Considering there are 50% of companies that needs a synchronized communication tool (other companies use alternatives like WhatsApp, google sheet, etc)=0.7Bn

There are majorly two widely used tool for the same purpose which are Discord and Slack

Considering the Market size of both of them as 30% each

No. of Slack users=210Mn

Considering some 30% users used Slack but later stopped using it because of new alternatives or other reasons

No. of active users=147Mn

However, in these active users not all users will be using it every day considering 50% users use Slack daily

DAU=~73Mn