Kara Swisher interviews Stewart Butterfield, co-founder of the famous Flickr photo-sharing service that was sold you Yahoo, whose next start-up is an online game called Glitch.

Slack CEO Stewart Butterfield talks to The Wall Street Journal about the challenges of building a startup, the downsides of running a private company and his favorite computer game. Photo ...

Investigators say they do not believe foul play was involved in the disappearance of the teenage child of Stewart Butterfield, Slack’s billionaire co-founder and former CEO. Sixteen-year-old ...