OpenSignal is a mobile analytics company that specializes in wireless coverage mapping. It was founded in 2010 by Brendan Gill and Sam Westwood. OpenSignal collects data from users' smartphones to create maps of wireless coverage and network performance. The company's data is used by consumers, mobile operators, and regulators to make informed decisions about wireless networks. OpenSignal has over 100 million downloads of its mobile app and has received funding from notable investors such as Qualcomm Ventures and O'Reilly AlphaTech Ventures.