Interror is a thrash/groove metal band from Veria, Greece, active since 2002 and blending thrash metal's velocity with groove metal's rhythmic punch. The project delivers high-energy, riff-driven metal.

Into the Fray is a groove metal/metalcore band from Moscow / Saint Petersburg, Russia, active since 2016 and delivering heavy, rhythmic riffage with crushing mid-tempo intensity. The project channels the headbanging immediacy of groove metal.

Intorsion is a groove metal band from Trento, Italy, active since 2000 and delivering heavy, rhythmic riffage with crushing mid-tempo intensity. The project channels the headbanging immediacy of groove metal.

Intractable is a groove/thrash metal band from Lucerne, Switzerland, active since 2012, self-described as a diverse mixture of modern thrash and death metal featuring tremendous riffs and creative drumming. Their debut Inner Decay packs twelve tracks of uncompromising thrash-death energy.

Inverse Shift is a industrial/groove metal band from Naxxar, Malta, active since 2012 and delivering heavy, rhythmic riffage with crushing mid-tempo intensity. The project channels the headbanging immediacy of groove metal.

Invocator is a technical thrash metal band from Esbjerg, Denmark, active since 2017, delivering intricate, technically demanding thrash with groove metal underpinnings. The band channels the North Sea port city's energy into precision-engineered aggression.

Ionico is a heavy/groove metal band from Piedmont, Italy, active since 2012 and delivering heavy, rhythmic riffage with crushing mid-tempo intensity. The project channels the headbanging immediacy of groove metal.

Ireosis are a progressive, groove, and death metal band from Leeds, England, formed in 2025. Their debut EP Dark Matter delivers five tracks of heavy metal incorporating melodic and progressive elements.

Iris are a melodic groove metal and metalcore band from England, formed in 2003. Their discography includes releases like Wrath and Radiant, blending melodic sensibility with heavy grooves.