The Porter Motor Company was an early United States automobile manufacturer based in Boston, Massachusetts. 

They made the steam powered Porter Stanhope from 1900 to 1901 and advertised it as "The Only Perfect Automobile".

The light runabout featured an aluminum body and advertisements boasted a weight of 550 lbs. It was capable of 25 mph, and was priced at $750.

The magazine ad implored readers to "Write Now!" to 950 Tremont Building Boston, Mass. and "Order Now To Ensure Early Delivery". "Boiler is absolutely non-explosive and water feed automatic. It is free from all complications in its mechanism, so that an engineer is not necessary in its use."