Mitochondrion is a Canadian death metal band from Victoria, British Columbia, formed in 2003. The band has undergone some line-up changes, but since 2006 Mitochondrion was solidified as a power trio with Shawn Haché, Nick Yanchuk and Karl Godard. With this line-up Mitochondrion has recorded two full-length studio albums, the self-released Archaeaeon and Parasignosis, which was released through Profound Lore Records.
According to music critics, "What makes Mitochondrion stand out is their ability to bring order to chaos. [...] It is a trait they share with Deathspell Omega, who craft a dizzying amount of sounds and influences into something palpably evil and eminently listenable. When most other bands try this, it sounds like they are toying with forces they do not understand." The musicianship on Parasignosis has been defined by Decibel magazine as a "dense, not-so-easily-digestible labyrinth of frightening mindfuckery." While Parasignosis itself was praised as a "mind-blowing, highly individual album."

Pyrrhon is a technical death metal quartet based in Brooklyn, New York. Formed in 2008, the group comprises vocalist Doug Moore, guitarist Dylan DiLella, bassist Erik Malave, and drummer Steve Schwegler. Doug Moore says the group's main objective is to expand the definition of heavy metal while retaining the same passion of the genre.

Ulcerate is a New Zealand-based technical death metal band formed by guitarist Michael Hoggard and drummer Jamie Saint Merat in 2000. The band have released five full-length studio albums to date. The band's fifth full-length album Shrines of Paralysis was released on October 28, 2016 on Relapse Records. The band have been featured in numerous articles as one of New Zealand's most prominent extreme metal acts, have toured widely across North America and Europe, and have been compared favourably to bands such as Neurosis and Gorguts. The band's sound has been described as "nauseating, disorienting and gleefully disharmonic", and is characterised by extremely technical death metal with extensive use of dissonance, time signature changes, and complex song structures.

Gridlink is an American grindcore band, founded in 2004 in Hoboken, New Jersey. Their style can be described as technical grindcore with lyrical themes focused around abstract concepts and science fiction.
The band's song Orphan, also from their EP title Orphan, was played sporadically as torture in the episode Blind Spot, of the Showtime television series, "Homeland".

Disembowelment, often styled as diSEMBOWELMENT, was an Australian death/doom band that formed in November 1989 featuring Renato Gallina on guitar and vocals, and Paul Mazziotta on drums. In early 1991 Jason Kells joined on lead guitar and at the end of that year the group's line-up was completed by Matthew Skarajew on bass guitar. In 1992 they issued an extended play, Dusk, on Relapse Records and followed with a studio album, Transcendence into the Peripheral, in 1993. They disbanded shortly thereafter – never having performed live. Allmusic's Eduardo Rivadavia described them as "[s]till revered in underground circles as doom-grind pioneers ... [their works] remain genre classics".

Demilich is a death metal band from Finland which formed in the early 1990s and consisted of vocalist/guitarist Antti Boman, guitarist Aki Hytönen, bassist Ville Koistinen, and drummer Mikko Virnes.
Their debut album, Nespithe, featured intricate death metal riffs with extremely low, gurgled vocals in the vocal fry register. The album contained long, complicated song titles and unconventional lyrics which were written in code in the booklet. It was featured in Terrorizer's Secret History of Death Metal, in their list of "The 40 Albums You Must Hear"; they commented: "Even trying to scream your lungs out whilst vomiting a mix of Haggis, outdated goat's cheese and kebab won't do. Tested extensively by Terrorizer's scientific team, we can now safely say that no normal human is capable of reproducing the effect-free vocal madness displayed by Antti Boman on these Finns' sole, totally unique, album."
Demilich played what was believed to be their last show on July 22, 2006, but played at the Jalometalli Metal Music Festival in Oulu, Finland on August 14, 2010.
Demilich reunited for a show at Maryland Deathfest in 2015.