Intothecrypt is a death/doom/folk metal band from Yaroslavl, Russia, active since 2021 and weaving traditional folk elements into extreme metal frameworks. The project bridges ancient heritage with the ferocity of modern metal.

Irminsul is a pagan/viking/folk metal act from Gothenburg, Sweden, active since 2015 and channeling ancient mythology and warrior heritage through aggressive metal. The project draws from pre-Christian traditions and epic themes.

Iron SeaWolf is a folk metal band from Cumbria/Lancaster, United Kingdom, active since 2016 and weaving traditional folk melodies and instrumentation into heavy metal. The project bridges ancient cultural heritage with modern metal power.

Pagan/folk metal band from Äänekoski in central Finland, active since 2012. Their sound weaves Finnish folk elements through metal from the Keski-Suomi region.

Irrbloss is a black/folk metal band from Gothenburg, Sweden, active since 2022 and weaving traditional folk elements into extreme metal frameworks. The project bridges ancient heritage with the ferocity of modern metal.

Isatha is a folk metal band from Budapest, Hungary, active since 2018 and weaving traditional folk melodies and instrumentation into heavy metal. The project bridges ancient cultural heritage with modern metal power.

Iskandr is a black metal, folk/gothic rock band from Nijmegen, Netherlands, active since 2016 and weaving traditional folk elements into extreme metal frameworks. The project bridges ancient heritage with the ferocity of modern metal.

Ithilien is a folk metal/metalcore band from Brussels, Belgium, formed in 2011, coining the term "FolkCore" to describe their fusion of traditional Belgian folk instruments — Flemish bagpipes, hurdy gurdy, whistles, bouzouki — with metalcore and death metal. Influenced by Parkway Drive and Architects alongside folk traditions, their album From Ashes to the Frozen Land (2013) showcases this unique cross-pollination.