Guardant Health, Inc. is a precision oncology company engaged in the treatment of cancer through the 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 2011 and is headquartered in Palo Alto, CA.