Guardant Health, Inc. is a precision oncology company, which engages in treatment of cancer through use of proprietary blood-based tests, vast data sets, and advanced analytics. Its solutions include treatment selection, recurrence detection, and early detection. The company was founded by Helmy Eltoukhy, AmirAli H. Talasaz, and Michael Joseph Wiley in 2012 and is headquartered in Redwood City, CA.