Productivity app Trello sold for $425 million (Video) By: New York Business Journal via Business Journals January 09, 2017 at 11:22 AM EST Michael Pryor and Joel Spolsky launched Trello in 2011 as part of their first company, Fog Creek Software and later spun it off. Read More >> Related Stocks: Atlassian Corp Expedia Fog Cutter Capital Group Inc Microsoft