Home » BBC News - Technology » technology news » Slack: Why is this loss-making tech firm worth $20bn? Slack: Why is this loss-making tech firm worth $20bn? Unknown 7:52 AM BBC News - Technology technology news The messaging app has investors piling in on hopes it can replace email for workplace communication. from BBC News - Technology https://bbc.in/2Ix9sIT Share: Facebook Twitter Google+ StumbleUpon Digg Delicious LinkedIn Reddit Technorati