Daniel Stewart Butterfield (born Dharma Jeremy Butterfield; March 21, 1973) is a Canadian billionaire businessman, best known for co-founding the photo-sharing website Flickr and the team-messaging application Slack.
Stewart Butterfield is the CEO and co-founder of Slack. For more than 20 years, he has been an entrepreneur, designer, and technology leader, usually all at once. In 2013, Stewart and his team launched Slack, which has transformed business communication. Today, Slack is the leading channel-based messaging platform, used by millions to align their teams, unify their systems, and drive their businesses forward. In 2003, Stewart co-founded Flickr, one of the pioneers of image sharing and the social web. As CEO, he built Flickr into one of the largest web services in the world. Stewart has a Bachelor of Arts in Philosophy from the University of Victoria and a Master of Philosophy from the University of Cambridge. https://slack.com/about/leadership/stewart-butterfield