Charles Stack Overview

  • Investor Type
  • Angel

  • Status
  • Active

  • Professionals
  • 1


  • Investments
  • 3

  • Portfolio
  • 1

  • Exits
  • 2


Charles Stack General Information


Mr. Charles Stack serves as Innovation Consultant at FlashStarts. He serves as an Advisor at Remesh. He served as Board Member at Complion. He served as Board Member at Lufthouse. After graduation from Case Western Reserve University Law School, he formed Parallax, Inc., which developed and marketed a PC-based networking case management software system for asbestos litigation to national law firms and corporate law departments. In 1992, Charles started, the first online bookstore. Charles pioneered many of the features we now take for granted in today's internet retailers. offered millions of books, comprehensive searching, collaborative recommendations (patented), shopping carts, price comparisons (patented), real-time credit card processing, affiliate programs, and introduced many other now standard Internet retailing concepts. was acquired by CUC, Inc. in early 1996 and subsequently by Barnes and Noble. At CUC, Charles designed and launched groundbreaking sites for online music sales, movies, gifts, computer software, and games. In 1998, he founded Flashline to address the new opportunity in software components and web services. After navigating Flashline through the technology meltdown of 2001-2003, Charles focused Flashline on the expanding web services management market and created the leading web services repository solution with multiple patents. BEA Systems, Inc. acquired Flashline in 2006. BEA was acquired by Oracle in 2008 and the Flashline product remains the core offering in Oracle's web services suite. Charles has mentored, advised, and/or invested the first money in several notable startups including OnShift, DecisionDesk, eFuneral, Skritter, and iGuiders. In 2000, Charles won the Infoworld E-Business Innovator Award for his contributions to Internet Retail along with Tim-Berners-Lee (WWW), Dr. James Gosling (Java), Jeff Hawkins (Palm Pilot), Richard Stallman (GNU), Times Howes (LDAP), and Phil Zimmerman (PGP). Charles won the Ohio Venture Association (OVA) Venture of the Year award in 2007 and served on the OVA board until 2010. He has mentored and/or be a judge at numerous business plan and startup competitions including the recent Startup Weekend Cleveland and the 11 regional University iDeaLabs competition.

Business Details

Investor Status
Actively Seeking New Investments
Primary Investor Type
Angel (individual)
Corporate Office
  • Cleveland, OH
  • United States

Charles Stack Investments (3)

Company Name Deal Date Deal Type Deal Size Industry Company Stage Lead Partner
Remesh 07-Apr-2017 Seed Round 00.000 Business/Productivity Software Generating Revenue 0000000 00000
iGuiders 14-Jul-2010 00000 00000 00.000 Application Software Out of Business 0000000 00000
Skritter 01-Jun-2010 00000 (00000 0000 Educational and Training Services (B2C) Generating Revenue 0000000 00000

Charles Stack Exits (2)

Company Name Exit Date Exit Type Exit Size
Skritter 01-Jan-2023 Secondary Transaction - Private
iGuiders 01-Oct-2014 000 00 00000000

Charles Stack Investments by Industry, Year, and Region

Investments by Industry

Investments by Year

Investments by Region

PitchBook’s data visualizations quickly surface an investor’s historical investments—showing a breakdown of activity by industry, year and region.

Charles Stack Team (1)

Name Title Deals Funds Boards Office
Charles Stack Angel Investor 00 0 Cleveland, OH

Charles Stack FAQs

  • Who is Charles Stack?

    Charles Stack is an angel Investor who has made 3 investments.

  • What kind of investor is Charles Stack?

    Charles Stack is an angel investor.

  • What does Charles Stack do?

    As an angel investor, Charles Stack invests personal money into promising companies, typically in exchange for equity.

  • What has Charles Stack invested in?

    Charles Stack has made numerous investments in companies like Remesh, iGuiders, and Skritter within the Business/Productivity Software, Application Software, and Educational and Training Services (B2C) industries.

  • What has Charles Stack invested in recently?

    Charles Stack's latest investment was on 07-Apr-2017 in Remesh, a company within the Business/Productivity Software industry.

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