Mr. Joe Greenstein was a Co-Founder at Innerspace. He was a Co-Founder & served as Chief Executive Officer at Flixster. Prior to Flixster, he was part of the startup team and Director of Product Management at Edusoft, a web-based curriculum and assessment platform for public school districts used by more than 4 million students nationwide. Edusoft was acquired by Houghton-Mifflin in 2003. While still an undergrad, he was a co-founder of CoreMetrics - one of the leading providers of real-time web analytics which was later acquired by IBM. He was an advisor at fbFund REV. He also serves as Strategic Limited Partner at Four Rivers Group. He also serves as a Board Member at Change.org. He serves as a Board Member at Juvo. He is also an Angel Investor. He also served as an advisor at Xapo.