Steven Thomas (born October 13, 1971; found dead July 14, 2008, age 36) was an American entrepreneur who founded the computer security company Webroot Software.

After being diagnosed with "possible" bipolar disorder, he went missing in June 2008. His body was found on July 2, 2008, at the bottom of Pali Lookout near Honolulu. An autopsy showed that his injuries appeared to be consistent with a fall; However he did send a letter to his closest friends that if he turned up missing or dead it was not his fault. The case is still open with the Honolulu Police and is deemed as an unattended death. Many conspiracies still surround his death.