The Inventor: Out for Blood in Silicon Valley is a 2019 American documentary film, directed and produced by Alex Gibney. The film revolves around Elizabeth Holmes and her former company Theranos. It is considered a companion piece to the book, Bad Blood: Secrets and Lies in a Silicon Valley Startup.

Philip Alexander Gibney is an American documentary film director and producer. In 2010, Esquire magazine said Gibney "is becoming the most important documentarian of our time."