Docile plays progressive death metal from Zwolle, formed in 2024 and whose deliberately tame name stands in ironic contrast to the complexity and intensity of their music. Their compositions prove that docility is the last thing their progressive death metal offers.

Dol Ammad is an epic space metal project from Thessaloniki, Greece, created in 2004 by composer Thanasis Lightbridge, merging bombastic power metal with synthesizers and classical choirs. Part of Lightbridge's trilogy of fusion projects alongside Dol Theeta and Dol Kruug, the discography spans from Star Tales (2004) and Ocean Dynamics (2006) through Winds of the Sun (2010) to Stella Nova (2025).

Dol Theeta is a progressive and symphonic metal project with electronic music influences from Thessaloniki, Greece, formed in 2008 by composer Thanasis Lightbridge. A sister project to Dol Ammad, the band explores the fusion of electronic music and heavy metal from a progressive angle.

Dominant Chain plays melodic progressive metal from the rural municipality of Sonkajarvi in eastern Finland, formed in 2025 and bringing complex, melody-driven compositions from one of Finland's most remote corners. Their name's image of unbreakable sequence translates into tightly linked musical passages.

Doomed from Day One is a progressive deathcore band from Guildford, Surrey, formed in 2011 and described as merging prog, tech, and death metal into a fiery hybrid. Their releases The Wasted World (2011) and the Nine Fingers EP (2013), recorded by Chris Munday at CJM Productions, earned them a reputation for savage live shows and impeccable musicianship.

Doomsday Astronaut plays progressive metal from Sibiu in Transylvania, active since 2020 and launching complex, exploratory compositions from the medieval heart of Romania. Their name's juxtaposition of apocalypse and space exploration creates a thematic framework for ambitious, forward-thinking metal.

Doomsday Sun is a progressive heavy and groove metal band from Uttoxeter, Staffordshire, formed in 2021. Their growing catalog includes the Cult of Stasis EP, Where the Hammer Lies, A Slow, Agonising Rapture, and the album Beat Together, Bleed Together, all framed by an apocalyptic, post-civilisation narrative.

Dordeduh plays atmospheric and progressive folk/black metal from Timisoara, formed in 2010 by former members of Negura Bunget and carrying forward that legendary band's vision of Transylvanian black metal infused with traditional Romanian folk elements. Their music weaves acoustic folk passages and ethnic instruments through expansive, spiritually charged black metal compositions that rank among Romania's most distinctive extreme metal output.

Dorian Sky is a progressive heavy metal band from Athens, Greece, formed in 2019. The band blend progressive compositions with classic heavy metal power.