In the back kitchen of Mountain View’s newest pizzeria, Marta works tirelessly, spreading marinara sauce on uncooked pies. She doesn’t complain, takes no breaks, and has never needed a sick day. She works for free.

Marta is one of two robots working at Zume Pizza, a secretive food delivery startup trying to make a more profitable pizza through machines. It’s also created special delivery trucks that will finish cooking pizzas during the journey to hungry customers if approved by the Santa Clara County Department of Environmental Health. Right now Zume is only feeding people in Mountain View, California, but it has ambitions to dominate the $9.7 billion pizza delivery industry.  

Read moreInside Silicon Valley’s Robot Pizzeria