New Relic Inc. (NYSE: NEWR) started up in 2008 to help companies determine how they are performing in the digital realm. Using software that assesses customer engagement online — something it calls “application performance management” — New Relic's platform measures how customers are interacting with an application, whether on a company’s Web site, through a remote cloud-based service or via a mobile phone. But while most analytic solutions look backward — telling you how you did yesterday, last week or last month — New Relic tells companies what’s happening right now, in real time. It’s “How’m I doin’?” for the digital age.