InDubio is a band from Zwiesel, Germany, formed in 2018, initially rooted in death/thrash metal before evolving toward a heavy metal and punk hybrid. The band's stylistic evolution traces a path from extreme metal to more accessible, punk-tinged heaviness from the heart of the Bavarian Forest.

Inept Madness is a heavy/doom metal act from Lund, Sweden, active since 2011 and channeling monolithic heaviness through its doom metal framework. The project delivers oppressive, glacially paced compositions.

Finnish metal band from Kerava that has evolved from early heavy/thrash metal and hard rock into melodic death metal, active since 2017. Their stylistic shift reflects a move toward Scandinavian melodeath.

Inercia is a heavy metal band from Almeria, Spain, active since 2012, delivering classic-style heavy metal from the sun-drenched coast of southeastern Andalusia. The band channels over a decade of commitment to powerful, riff-driven compositions.

Inexceso is a heavy metal/hard rock band from Madrid, Spain, active since 2009, delivering driving, riff-heavy anthems rooted in the traditions of classic European metal and hard rock. Over fifteen years, the band has built a solid reputation in the Madrid heavy music scene.

Inferior is a heavy metal band from Zoersel, Belgium, formed in 2025, carrying on the tradition of classic European heavy metal with a modern edge. The band represents a new generation of Belgian headbangers committed to pure heavy metal songwriting.

Inferno B.C. is a heavy/groove metal band from Zadar, Croatia, active since 2015 and delivering heavy, rhythmic riffage with crushing mid-tempo intensity. The project channels the headbanging immediacy of groove metal.

Inferno Noir are a melodic thrash metal band from London, formed in 2018. Their self-titled debut features dark, heavy music with fast drumming and deep growling vocals balanced by strong melodic elements.

Infernorama is a heavy/progressive/gothic metal act from Netherlands, active since 2021 and weaving dark romanticism and heavy atmospherics into its sound. The project channels the melancholy and grandeur of gothic metal.