Stamped Collection: Startup Adds DeGeneres, Seacrest As Investors

Stamp Collection: Ellen DeGeneres and Ryan Seacrest are among the startup's new investors.

The Stamped headquarters could belong to just about any startup—the only identifying mark on its battered beige door is a Post-It note that reads, “Stamped, Inc. #10B”; inside the Union Square loft, caffeinated coders clatter away on Mac laptops. The company’s roster of investors, however, is anything but ordinary.

Today, the social curation startup announced a new round of financing that includes contrib...