HP ArcSight is a cyber security company founded in 2000 that provides big data security analytics and intelligence software for security information and event management (SIEM) and log management solutions. ArcSight is designed to help customers identify and prioritize security threats, organize and track incident response activities, and simplify audit and compliance activities. May 2013 marked the 10th consecutive year that Gartner Magic Quadrant for SIEM rated ArcSight in the leader’s quadrant. It became a subsidiary of Hewlett-Packard in 2010.HP ArcSight is headquartered in Sunnyvale, California, USA, with sales offices in other countries.