Next Big Sound – Measures the growth and popularity of music groups across major web properties like MySpace,Twitter, Last.fm, and others. Next Big Sound measures things like number of fans, number of plays, and comments. It’s best understood as a sort of Compete.com for bands. The company hopes to be the de facto standard for understanding band related metrics on the web. They currently track about 500,000 bands. They use the “Freemium model” with free basic accounts, and charge for premium services like more advanced reports, social media impact analyses, and other services. Current customers include Jason Mraz and about 30 other bands.