Grooveshark is an internet service for music. It has a search engine, streaming service, and recommendation application. Users can stream and upload music that can be played immediately or added to a playlist.

As of January 2012, Grooveshark has been sued for failure to pay royalties and for copyright-violations. The liabilities for the copyright infringements alleged by Universal Music Group have been estimated at fifteen billion dollars. Lawsuits complaining about copyright-infringement have been filed in U.S. courts by "all" the major music companies, namely EMI Music Publishing, Sony Music Entertainment, Warner Music Group, and Universal Music. Complaints have also been made by progressive rock bands Pink Floyd and King Crimson. Grooveshark has claimed that it operates under a "safe harbor" provision of U.S. copyright law, a provision that is restricted to the United States; this is being disputed in courts.

On April 1, 2011, the Grooveshark app was pulled from the Android Market. A Grooveshark application was also removed from iPhone by Apple, which was concerned about copyright and intellectual property. In May 2012 complaints about copyright infringements led Facebook to "ban" Grooveshark.