Guy Speranza (March 12, 1956 – November 8, 2003) was an American singer best known as New York City-based metal band Riot's original frontman from 1975 to 1981.

Speranza sang on the first three albums of Riot, 1977's Rock City, 1979's Narita and 1981's Fire Down Under and played at the first Monsters of Rock festival in 1980, before leaving the band in 1981.

In 1982, Scott Ian called Speranza to offer him the position as the lead singer for Anthrax. Speranza declined the offer, saying he was done with the music business.^[1]

After retiring from music, Speranza worked as an exterminator in Florida until being diagnosed with pancreatic cancer, from which he died on November 8, 2003.