Joe Greenstein is one of the founders of InnerSpace – a non-profit community of over 500 startup founders striving to build happier, more effective and more purposeful organizations. Prior to InnerSpace, Joe was co-founder and CEO of Flixster & RottenTomatoes – one of the leading movie discovery services used by over 40M people each month. Flixster was acquired by Warner Brothers in 2011. Before Flixster, Joe was part of the startup team and head of product management at Edusoft - a leading provider of curriculum management software to public school districts. Edusoft was bought by Houghton-Mifflin in 2003. Joe is also an active angel investor/advisor in over 40 companies including EventBrite, Opower and Change.org.