StumbleUpon is a discovery engine that finds and recommends personalized web content to its users.
Acquired by eBay
StumbleUpon is the easiest way to discover new and interesting things from across the Web. More than 25 million people turn to StumbleUpon to be informed, entertained and surprised by content and information recommended just for them. In addition, more than 80,000 brands, publishers and other marketers have used StumbleUpon’s Paid Discovery
platform to tell their stories and promote their products and services. Explore more at www.stumbleupon.com.