The messaging app that is an acronym for "Searchable Log of All Conversation and Knowledge" was founded by a business of what descent?
Stewart Butterfield Daniel Stewart Butterfield (born Dharma Jeremy Butterfield, 1973) is a Canadian entrepreneur and businessman of Polish descent, best known for being a co-founder of the photo sharing website Flickr and team messaging application Slack.
Jack Dorsey Jack Dorsey (born November 19, 1976) is an American computer programmer and internet entrepreneur widely known as a co-founder and CEO of Twitter, and as the founder and CEO of Square, a mobile payments company. In 2008, he was named to the "MIT Technology Review" TR35 as one of the top 35 innovators in the world under the age of 35. For 2012, "The Wall Street Journal" gave him the "Innovator of the Year Award" for technology.