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.
Bradley Tusk Bradley Tusk (born October 3, 1973) is an American businessman, venture capitalist, philanthropist, political strategist, and writer. He is the founder and CEO of Tusk Holdings, a multi-faceted platform featuring multiple businesses (Tusk Ventures, Tusk Strategies, Ivory Gaming, Kronos Archives), politics, philanthropy, and writing and commentary.