Edge of Sanity was a Swedish death metal band that, alongside Opeth, is commonly regarded as being the first to fuse extreme metal styles like death and black metal with progressive rock. The group was founded by Dan Swanö in 1989 and ended in 2003.

Dan-Erland Swanö, also known as Dan "The Man" Swanö, is a Swedish musician and record producer who is currently the vocalist, guitarist, ex-bassist and ex-drummer for the band Nightingale, lately vocalist, keyboardist and drummer for the band Witherscape, as well as the owner of Unisound, but he achieved fame as the vocalist and songwriter of progressive death metal band Edge of Sanity.