Metroscope, a start-up, is developing a diagnostic tool for industries to improve management and maintenance. The software is based on a digital twin that reproduces the operations of the factories in real time. Just 2 years after launch, Metroscope technology is being used in power plants on both sides of the Atlantic, and is diversifying. The start-up has offices in Paris and Berlin and a presence in the United States with its partner Framatome.