The 22-year-old comic said Cudi's early work kept him going when he was a teenager, reported ET online.
"Cudi's the best of all. He saved my life. I would've killed myself if I didn't have Kid Cudi," Davidson said.
According to the "Saturday Night Live" star it was Cudi's 2009 debut studio album that had the biggest impact on helping him through some of the darker periods of his life.
"I would've killed myself. Absolutely 100 percent. I truly believe if Man on the Moon didn't come out, I wouldn't be here," he said.