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.
Ben Silbermann Ben Silbermann (born 1982) is an American Internet entrepreneur who is the co-founder and CEO of Pinterest, a virtual pinboard which lets users organize images, links, recipes and other things. The website allows users to create and manage theme-based image collections called "pinboards". Examples include events, interests, hobbies and more. Users can browse other pinboards for inspiration, 're-pin' images to their own collections and/or 'like' photos.