​​

Kallias is a progressive death metal band fronted by guitarist and vocalist Nicole Papastavrou, with Chris Marrone on bass and vocals, Erik Ryde on lead guitar (also of Galactic Empire), and Justin Gogan on drums. Their sound blends influences from Meshuggah, Opeth, Decapitated, and Extol, showcasing a balance of aggressive riffs and catchy melodic choruses, all played on 8-string guitars.

 

The band has made waves with notable collaborations on their debut album First Ascent, featuring guest solos from Jeff Loomis (Nevermore, Arch Enemy), Greg Burgess (Allegeaon), Rafael Trujillo (Obsidious, Daath), and Ole Borud (Extol) on the single "Mouthless Embassy." 

 

In 2025, Kallias released their sophomore album, Digital Plague, featuring guest solos by Ian Waye of Soreption, and a guest vocal appearance from Chaney Crabb of Entheos. The album is mixed and mastered by Dave Otero and distributed worldwide through AISA/The Orchard.​