page_title: Stewart Butterfield
hierarchical_section_title: Stewart Butterfield
caption_attribution_description: 7 November 2017; Stewart Butterfield, Co-Founder &amp; CEO, Slack, on the SaaS Monster Stage during the opening day of Web Summit 2017 at Altice Arena in Lisbon. Photo by Cody Glenn/Web Summit via Sportsfile
context_page_description: Daniel Stewart Butterfield is a Canadian billionaire businessman, best known for co-founding the photo-sharing website Flickr and the team-messaging application Slack.
context_section_description: 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.
caption: Stewart Butterfield in 2017
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