Slack Technologies went public Thursday. In the fiscal year that ended Jan. 31, the company nearly doubled its revenues, to about $400 million. But it had a net loss of nearly $139 million. Eric Baradat/AFP/Getty Images hide caption toggle caption Eric Baradat/AFP/Getty Images Business Putting A Price On Chat: Slack Stock Jumps On 1st Day Of Trading June 19, 2019 Slack has grown to more than 10 million users and has become a verb in the process. "I'll Slack you" is shorthand for sending a message via the chat platform. Its stock soared in its public debut.