Callisto is a post-metal band from Turku, Finland.
The band was formed in 2001 in Kokkola. Whilst their early works are hardcore/metalcore, their first album True Nature Unfolds has a strong sludge metal and doom influence.
Recorded in 2004 by the late Mieszko Talarczyk of Nasum fame and introduced to Earache Records a year later through Johannes Persson from Cult of Luna, earning them worldwide distribution.
The band's sophomore album Noir, released in 2006, still drawing from modern sludge also introduced subtle jazz leanings, heavy use of mellotron and experimentation with unconventional rock instruments such as the saxophone and the flute.
Their third album Providence, released in 2009, marked another experimental shift in style, taking some distance from the more instrumental material, Callisto composed a vocal record presenting a new member Jani Ala-Hukkala handling the vocals. The songs on "Providence" are built upon layers of melodies, using a broader palette they have coloured their sound with twangy guitars, mellotrons, prog rock overtones and a singing style that can be traced back to 90s-era vocalists like Layne Stayley.