Cruachan was founded in Dublin in 1992 by singer and guitarist Keith Fay. They are considered as pioneers in the field of folk metal and combine traditional Irish folk musical instruments such as tin whistles and bodhrans with elements of Heavy Metal.

Cruachan's lyrics often draw on Celtic mythology, legends and Irish history, providing a unique cultural perspective in their music. They have a dedicated fan base and continue to push forward with their music and unique sound.