Xenosis is a progressive death metal band from St. Ives, England, formed in 2015. They craft intricate, technically demanding compositions that blend progressive complexity with death metal aggression, contributing to the growing UK tech-death scene.

Xephos is a progressive/industrial metal band from Maybole, Scotland, formed in 2016. They merge the experimental ambition of progressive metal with industrial textures, creating a futuristic and atmospheric sound from the Scottish lowlands.

Xepsura is a progressive metal band from Newquay, Cornwall, England, formed in 2020. They deliver expansive and atmospheric progressive metal from England's southwestern coast, exploring ambitious musical territory with intricate arrangements.

Xerxes is a progressive metal band from Barschwil, Switzerland, formed in 2015. They craft intricate and technically demanding compositions within the progressive metal framework, drawing from the rich tradition of European progressive music.

Xianosys is a progressive power metal band from Paris, France, formed in 2017. They fuse the melodic grandeur of power metal with the structural complexity of progressive metal, reflecting the depth of the French progressive metal scene.

Xiom is a progressive death/thrash metal band from Chemnitz, Germany, formed in 2021. They weave together progressive structures, death metal heaviness, and thrash metal aggression into technically complex compositions that push beyond conventional genre boundaries.

XSUS is a progressive death metal band from Belgrade, Serbia, formed in 2020, humorously describing themselves as "four guys who accidentally warped themselves from 1999 into the present." Their releases including the "Legacy EP" series and "Kindred Spirit" blend retro 90s metal influences with a modern progressive death metal sensibility.

Xystus is a progressive/symphonic metal band from 's-Hertogenbosch, Netherlands, formed in 2023. They merge progressive metal complexity with symphonic grandeur, creating ambitious, layered compositions that showcase the Netherlands' strength in orchestral metal.

Progressive/post-black metal solo project from Berlin, Germany, formed in 2019 by the musician known as Y who handles all instruments. Their 2019 album "Dkvdnt" features three extended instrumental compositions recorded between 2016 and 2017, with drums laid down in Lyon, France and released as a limited 200-copy CD digipack.