Interhell are a three-piece instrumental stoner and doom metal band from Vienna, founded in 2010 and playing a mix of groovy, melodic, and occasionally psychedelic riff-driven compositions. They released Industrial Dog in 2018 and a self-titled record in 2023, and have shared stages with visiting acts including Eyehategod.

Interspace is a Danish stoner/doom metal band active since 2013, crafting hazy, riff-heavy compositions that merge the psychedelic weight of stoner metal with doom's glacial pace. The band channels cosmic themes through earthbound heaviness.

Into the Wild is a stoner metal/rock band from Osnabruck, Germany, active since 2011, crafting hazy, riff-heavy compositions with roots in both stoner metal and hard rock. The band channels the laid-back intensity of stoner metal from the heart of Lower Saxony.

Inverted Mind is a sludge/stoner metal band from Kraków, Poland, active since 2012 and delivering fuzz-laden, groove-heavy riffs through a haze of overdriven amplification. The project channels the riff-worshipping spirit of the genre.

Iron Bra is a stoner/doom metal/grunge band from Oslo, Norway, active since 2021 and delivering crushing, fuzz-laden heaviness where doom's oppressive weight meets stoner metal's hazy grooves. The project channels low-end power and psychedelic atmosphere.

Iron Sect is a sludge/stoner/doom metal band from Saint Petersburg, Russia, active since 2024 and delivering crushing, fuzz-laden heaviness where doom's oppressive weight meets stoner metal's hazy grooves. The project channels low-end power and psychedelic atmosphere.

Iron Swan is a sludge/doom/stoner metal band from Nottingham, United Kingdom, active since 2013 and delivering crushing, fuzz-laden heaviness where doom's oppressive weight meets stoner metal's hazy grooves. The project channels low-end power and psychedelic atmosphere.

Ironrat is a groove/stoner metal band from Bradford, United Kingdom, active since 2014 and delivering fuzz-laden, groove-heavy riffs through a haze of overdriven amplification. The project channels the riff-worshipping spirit of the genre.

Irreversible Mechanism is a Minsk-based progressive/technical metal project featuring Vladislav Nekrash on guitar and bass, Andrew Parmon on guitar, and Dan Presland on drums. Originally rooted in progressive death metal before incorporating stoner rock elements, the band is known for highly technical, instrumental-leaning compositions produced, mixed, and mastered entirely by Nekrash.