Isoptera is a death metal/deathcore band from Tavannes, Switzerland, formed in 2015, delivering brutal, breakdown-laden extreme metal from the Bernese Jura. The band's name — the taxonomic order of termites — reflects their corrosive, relentless approach to heavy music.

Istrulity is a death/thrash metal band from Čačak, Serbia, active since 2011 and merging death metal's heaviness with thrash's relentless velocity. The project delivers aggressive crossover fury.

It Creeps and It Crawls is a death metal band from St. Ives, United Kingdom, active since 2013 and delivering uncompromising extremity through crushing riffs and guttural vocals. The project channels the relentless brutality of the genre.

It Summons the Shadows is a blackened death metal act from Stockholm, Sweden, active since 2025 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.

Itching is a metalcore/melodic death metal band from Cologne, Germany, formed in 2020, blending the breakdowns and aggression of metalcore with melodic death metal's harmonic richness. The band delivers emotionally charged extremity from the Rhine metropolis.

Ithaqua is a death metal band from Bronshoj, Denmark, active since 2014, named after the Lovecraftian Great Old One associated with arctic winds and frozen wastelands. The band channels cosmic horror themes through over a decade of crushing death metal from the Copenhagen suburbs.

Itheist is a black/death metal act from Plymouth, United Kingdom, active since 2019 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.

Melodic black/death metal band from Pori on Finland's western coast, formed in 2021. Their sound channels melodic extreme metal from the Satakunta region.

Death metal/grindcore band from Helsinki, Finland active since 2014. Their Finnish name — meaning 'self-contamination' — channels extreme metal from the Finnish capital.