https://www.cnet.com/news/slack-reportedly-expects-to-reveal-listing-prospectus-this-week/

The chat platform was reportedly valued at $7 billion in 2018, according to CNBC, and has more than 10 million daily active users. 

If all goes as planned, 2019 will be a year of tech IPOs. Silicon Valley companies like Lyft, Pinterest and Zoom have already gone public. Others like Airbnb and Palantir are expected to issue initial public offerings, along with ride-hailing giant Uber.