@CNN: Slack valued at $5.1 billion after securing significant new investment money https://t.co/nL6GJg4HM7 https://t.co/0LBaH1vIr4

@CNN: Slack valued at $5.1 billion after securing significant new investment money https://t.co/nL6GJg4HM7 https://t.co/0LBaH1vIr4