Zarathushtra is claimed to be a Persian Prophet. However it may be contended that he was neither. Zarathushtra hailed from Bactria that straddles present day Afghanistan, Tajikistan, and Uzbekistan. It lay in the far reaches of the Persian Empire that was only formed much later.
Zarathushtra did not enjoy a revelation; no Burning Bush or Angel Gabriel communicated with him. He formulated his philosophy by quiet meditation like the Vedic rishis (sages) of old: "Then did I realize Thee as the Most Bountiful One, O Mazda Ahura, when the Good Mind encircled me completely. And declared to me that silent......