Slack, the enterprise collaboration platform co-founded by Stewart Butterfield of Flickr fame, continues to defy its namesake: we have heard from sources that the company is raising a new round of funding at a valuation of between $800 million and $1 billion, just six months after raising nearly $43 million.
The total raise is said to be eight figures, and Sequoia and KPCB are participating, our sources tell us, although the company has been talking to multiple other VCs. The Information has also reported the rumors.
Asked for confirmation on the funding, Butterfield would not comment directly except to say that 2014 has been “crazy,” and that it would be very likely that his company would raise money some time “in the next six years.”
(Butterfield is known for his sometimes colorful ways with words.)