OTTO in Portland, Maine, and Boston, MA, is home to some of the best pizza in the country. Try our signature Mashed Potato, Bacon and Scallion pie.Learn more about OTTO Pizza, Opens a popupSpecialtiesOTTO in Portland, Maine, and Boston, MA, is home to some of the best pizza in the country. Try our signature Mashed Potato, Bacon and Scallion pie.HistoryEstablished in 2009.OTTO began in Portland Maine in June of 2009. Immediately embraced by foodies and those simply seeking a good slice of pie, OTTO has grown to 10 locations in MA and ME, garnering regional and national awards along the way.