Mobile performance testing service provider HeadSpin announced it has raised $20 million in a Series B round of funding. The round includes new investors ICONIQ, Battery Ventures, EQT Ventures, Kearny Jackson, Adam D’Angelo, Ross Mason and Ryan Hoover. They join existing investors GV, Telstra Ventures, Danhua Capital, Nexus Ventures Partners, NextWorld Capital and others. The company was founded in 2015.