Abyss Nöir blends progressive black and death metal from an undisclosed Italian location since 2020. Their Franco-English name adds a cosmopolitan flair to the technical ambition of their genre-crossing compositions.

Abysse pushes the boundaries of progressive metal with experimental elements from the western French town of Cholet since 2008. Their French spelling of "abyss" reflects the depths of creativity they explore through unconventional compositions.

Acatonia explores progressive metal from Moscow since 2023. Named after the neurological state of catatonia — motor immobility despite wakefulness — their compositions find movement within apparent stillness.

Achilleus explores progressive heavy metal and rock from Kolsva in Västmanland since 2021. Named after the Greek hero with a distinctive spelling, they bring mythological heroism to progressive compositions from this small Swedish mill town.

Acid Age blends progressive and thrash metal from Belfast since 2013, bringing over a decade of compositional ambition to Northern Ireland's metal scene. Their psychedelic-era name hints at the mind-expanding dimension of their thrash.

Acid Empire crafts progressive and symphonic metal from the Surrey town of Guildford since 2010, bringing orchestral grandeur to the Home Counties. Over fifteen years of ambitious compositions reflect sustained commitment to expansive metal.

Acrid Tones are a progressive metal project from Menden, Germany, formed in 2019, who push beyond conventional metal structures with ambitious arrangements and technical musicianship. Their sound reflects the adventurous spirit of the European progressive metal tradition while maintaining a distinctly heavy foundation.

Acyl blends folk metal with progressive metal from Paris since 2010, weaving traditional world music elements into technically ambitious compositions. Their chemical name, referencing an organic chemistry functional group, suits their approach of bonding disparate musical elements into cohesive structures.

Ad Vitam explores progressive and melodic death metal from Sant'Antioco, a small island off southwestern Sardinia, since 2016. Their Latin name meaning 'to life' inverts death metal's typical preoccupation with mortality, bringing a life-affirming progressive vision from one of Italy's most remote settings.