Sideburn delivers metalcore from Rennes, the Breton capital, where they formed in 2014. Their rhythmically driven sound combines heavy breakdowns with the melodic sensibility cultivated in western France's vibrant heavy music community.

Pskov's Sidekut Slave practice black metal from the ancient border city since 2013. Their name and origins at one of Russia's oldest cities channel centuries of frontier conflict into atmospheric compositions.

Folk/power metal band formed in Belgium in 2023, combining the adventurous spirit of power metal with folk instrumentation and medieval-inspired themes. Their approach taps into the European tradition of folk-inflected metal with a distinctly Belgian character.

Progressive thrash metal band from Pleven in northern Bulgaria, active since 2018. Their progressive approach adds structural complexity and dynamic range to thrash metal's foundational aggression.

Sidewalk Mafia craft gothic and doom metal from Helsinki, combining dark urban themes with crushing heaviness. Formed in 2022, they bring street-level darkness to the Finnish capital's gothic doom scene.

Somma Lombardo's Sidhe blend doom and gothic metal with a name from Irish fairy mythology since their formation. This Lombard act channels Celtic mysticism through a distinctly Italian lens of dark romanticism.

Varese's Sidne deliver gothic metal from the Lombard lakes since 2020. Their sound trades in the atmospheric melancholy and dramatic tension that define gothic metal at its most evocative.

Siebenbürgen formed in Stockholm, Sweden in 1994, blending melodic black metal with gothic atmospherics and themes drawn from vampirism, darkness, and Nordic folklore. The band secured a deal with Napalm Records on the strength of their 1996 demo Ungentum Pharelis, leading to their debut album Loreia in 1997. Their third album Delictum marked a shift to English-language lyrics and a more pronounced gothic sensibility, a direction they continued through Darker Designs & Images (2005) and Revelation VI (2008). Active across two periods from 1994 to 2009, they remain a notable entry in the Scandinavian gothic-black metal tradition.

Siech practice black metal from Berlin, channeling the genre's harsh intensity from the German capital. Active since 2011, they've been a persistent voice in Berlin's deep and varied black metal underground.