As Chief Executive Officer, Stephen Klein is responsible for establishing and implementing the overall strategic vision of ActiveBuddy, Inc. Klein has extensive experience launching and supporting various Internet ventures in capacities such as founder, marketing consultant and board member, and is a noted pioneer in bringing marketers to the Internet.

In 1997 Klein founded iballs, a pioneer of Internet ad placement and tracking. After two profitable years he sold the company to Avenue A Inc., but still maintains the title of Chairman of iballs (now called AvenueA/NYC). Klein is a co-founder of Wattage Monitor Inc., a company dedicated to intermediating price and service options for consumers and businesses in deregulated utility markets. He is also a founder and Venture Partner for Dawntreader Funds LP, a venture capital fund dedicated to early-stage Internet companies. He sits on the boards of a number of companies, public and private.

Klein began his career in the advertising industry, first at Grey Advertising in planning and research roles and later as Managing Partner of kirshenbaum bond & partners, where he helped grow the agency from 15 employees to over 400 in 10 years. Klein built and ran kb&p's media department, interactive services unit and IT department, and managed accounts including Snapple, Netscape, theglobe.com, uBid and DLJDirect. His team's work on Snapple's first Web site (one of the earliest consumer brand sites) earned him high praise as a brand marketer who "got the Net."

Klein is a graduate of Columbia University.