Charles Stack is a Cleveland-based angel investor and serial entrepreneur who previously founded Flashstarts. See sector focus and contact routes.
Charles Stack is a Cleveland-based angel investor and serial entrepreneur who previously founded Flashstarts, a local business accelerator where he serves as CEO and Innovation Consultant. His investment thesis focuses on seed-stage companies, with stated interests in health & wellness and venture capital sectors within the Ohio region. Stack has completed three documented investments, though specific check sizes and whether he typically leads or follows are not publicly disclosed. His notable portfolio includes Ohio Venture Association, DecisionDesk, Remesh, and The City Club of Cleveland. As a pioneer in internet retail, Stack founded Books.com in 1992, the first online bookstore, which was later acquired by Barnes & Noble. He also founded Parallax Inc. and Flashline, a web services management company whose product remains part of Oracle’s suite. In 2017, he received the VentureOhio award for Catalyst of the Year for his role in building Flashstarts. Stack advocates that entrepreneurs explain their business models simply, suggesting they start by explaining their venture to a great-grandmother before diving into details.
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