Sintech forge industrial black metal from Neustadt bei Coburg in Upper Franconia, fusing the cold atmospheres of black metal with mechanical, electronic textures. Active since 2003, they've spent over two decades at the intersection of these two extreme forms.

Sinthrone deliver melodic heavy metal from Kuopio in eastern Finland, combining classic metal melodies with the dark-throne imagery their name suggests. Active since 2016, they bring Savo-region melody to the Finnish metal landscape.

Sinvision blend black metal with punk from the Oulu suburb of Kempele, creating a raw hybrid that channels both genres' DIY aggression. Active since 2015, they bring cross-genre vision to the Ostrobothnia underground.

Sinworks blend death metal with metalcore from Berlin, combining extreme metal's brutality with the rhythmic punch of modern heavy music. Active since 2013, they draw from the German capital's vast and diverse metal ecosystem.

Sions Funeral deliver melodic death metal from Neheim in the Sauerland, combining Scandinavian melodeath influences with their own Westphalian character. Active since 2012, they bring emotional intensity and harmonic sophistication to the North Rhine-Westphalia extreme scene.

Sipher craft gothic, alternative, and industrial metal from Helsinki, blending multiple dark music traditions into a versatile heavy sound. Active since 2015, they bring encoded darkness to the Finnish capital's alternative metal scene.

Siren channel black metal from Bergisch Gladbach in the Rhineland, their mythological name evoking the dangerous allure of their dark compositions. Active since 2018, they add to the rich tapestry of North Rhine-Westphalia's black metal underground.

Sirenia was founded in Stavanger, Norway in 2001 by Morten Veland, shortly after his departure from Tristania, a band he had co-founded. Veland brought an early batch of compositions with him and used them to build the debut album At Sixes and Sevens, establishing the band's template of gothic metal layered with symphonic orchestration, soprano vocals, choral arrangements, and Veland's own death growls. The band has released twelve studio albums over more than two decades, with Veland handling nearly all instrumental duties throughout. Sirenia remain one of the most consistent acts in European symphonic gothic metal.

Sirens of Crisis blend crust and sludge metal from Leverkusen, combining punk's raw urgency with sludge's crushing weight. Active since 2014, they bring a politically charged, abrasive sound to the Rhineland heavy scene.