Doom metal band from Paris, France formed in 2021. Their French name — meaning 'intravenous' — channels crushing doom from the French capital.

Introversion is a Swiss doom/black metal project formed in 2019, inhabiting the desolate territory where glacial doom riffs meet the frozen hostility of black metal. The band crafts immersive, slow-burning compositions that merge both genres' most oppressive qualities.

Invernoir is a gothic/doom/death metal act from Rome, Italy, active since 2020 and merging death metal's ferocity with doom's oppressive weight. The project inhabits the crushing intersection where both genres converge.

Invisible Hate is a doom metal act from Kragujevac, Serbia, active since 2020 and channeling monolithic heaviness through its doom metal framework. The project delivers oppressive, glacially paced compositions.

Invocation were a doom/death metal band from Trofaiach, Styria, formed in 1990 and active through the early part of that decade, releasing material on Napalm Records at a time when that label was first building its extreme metal catalog. The band dissolved in 1994, leaving behind a small body of work that captures Austria's nascent death-doom scene at its earliest formation.

Invouta is a sludge/doom metal band from Fribourg, Switzerland, formed in 2018, crafting heavy, slow-motion compositions in French. With releases including Ainsi-soit-il, L'appel de la corde, and Face à face, the band has been making metal for years and solidified their current formation in 2022.

Iommi are a doom/heavy metal band from Birmingham, England, formed in 2025. Named after the godfather of heavy metal's hometown, they carry forward Birmingham's rich doom metal tradition.

Iraventus is a melodic doom/death metal act from Saint Petersburg, Russia, active since 2017 and merging death metal's ferocity with doom's oppressive weight. The project inhabits the crushing intersection where both genres converge.

Irgalom is a black/death/doom metal act from Budapest, Hungary, active since 2018 and merging the atmospheric darkness of black metal with death metal's crushing brutality. The project delivers fierce extremity at the crossroads of both genres.