Co-founder of Slack Stewart Butterfield. Photo: Mark Neuling/CNBC/NBCU Photo Bank via Getty Images.
Slack, the popular workplace instant-messenger, with more than 8 million daily active users is preparing to go public next year at a valuation well in excess of $7 billion, per The Wall Street Journal.
Why it matters: After years of staying private, tech companies "are now increasingly being drawn toward the IPO market, ... one of the best in years," WSJ's Maureen Farrell writes. As of now, more than 40 tech companies went public, up 50% this year per Dealogic.