Insignium is a black/death metal band from Hagen, Germany, formed in 2018, merging the atmospheric hostility of black metal with death metal's crushing weight. The band channels the industrial energy of the South Westphalian city into dual-genre extremity.

Insonus is a black metal project from Pescara, Italy, active since 2016 and forging dark, aggressive extremity within the Italy black metal scene. The project channels the unrelenting intensity of the genre.

Insulter is a thrash/black/death metal band from Friedrichsdorf, Germany, active since 2012, wielding a triple-headed attack that draws from thrash, black, and death metal simultaneously. The band delivers a savage, genre-blending assault from the Taunus foothills north of Frankfurt.

Black/thrash metal band from Sabadell near Barcelona, active since 2008 — over 15 years of blackened thrash from the Catalan industrial city.

Insurrect are a black/death metal and crust band from the United Kingdom, formed in 2023. Their releases including Nomadic War Machine blend extreme metal with politically charged crust punk under a Red Black Resistance banner.

Insómnia Pálida is a raw black metal project from Bragança, Portugal, active since 2026 and dealing in lo-fi, primitive black metal hostility stripped to its most essential and aggressive core. The project embraces the rawest traditions of the genre.

Intaos is a black/thrash metal act from Chelyabinsk, Russia, active since 2023 and fusing black metal's corrosive darkness with the speed and aggression of thrash. The project delivers volatile crossover fury.

Integritlie are a black/thrash metal band from the Mondsee-Unterach area of Upper Austria who sing and write in the local Austro-Bavarian dialect, lending their aggressive thrash framework an unusual linguistic identity. Their 2017 self-titled album features tracks like "Todgeweiht" and "Flammeninferno," marrying raw black metal energy to driving thrash riffs.

Black metal band from Madrid, Spain active since 2012. Their Latin name — meaning 'immoderate' — signals an extreme approach to black metal from the Spanish capital.