Fleurs du Mal is a depressive/post-black metal project from Rivne in western Ukraine, formed in 2019. Named after Baudelaire's landmark poetry collection, they channel literary darkness through atmospheric black metal from the Volhynia region.

Flooded Grave is a black metal project from Amsterdam, formed in 2017. They channel atmospheric black metal from the Dutch capital, a city whose below-sea-level geography gives their waterlogged band name a literal resonance.

Floods is a black metal project from Italy, formed in 2016. They channel atmospheric black metal through a distinctly Italian creative lens, contributing to the country's rapidly expanding extreme metal underground.

Floscule is a black metal project from Mykolaiv, Ukraine, formed in 2024. Their botanical name — meaning a small flower — creates an unlikely contrast with the extremity of their black metal from southern Ukraine.

FLTH is a black metal project from Eindhoven in the Netherlands, formed in 2022. They deliver raw, uncompromising black metal from the city best known internationally as the home of the Roadburn festival and one of Europe's key underground metal hubs.

Fluisteraars is a post-black metal band from Bennekom in Gelderland, active since 2014 and recognized as an important force in the Dutch black metal landscape. Their trilogy De Kronieken Van Het Verdwenen Kasteel and earlier works like Gegrepen Door de Geest der Zielsontluiking blend raw atmospherics with blackened psychedelic folk-rock, rooted in the rural isolation and folkloric mysticism of their home province.

Flukt is a black metal project from Vennesla in southern Norway, formed in 2015. Their name — Norwegian for 'escape' or 'flight' — implies a desperate urgency that drives their black metal from the Agder region.

Fluoryne is a black metal band from Steinhagen, Germany, active since 2005. With two decades of activity, the band has been a quiet but persistent force in the Westphalian black metal underground.

Flúch is a raw black metal and ambient project from Belgium, formed in 2024. Their releases include "Wintr," "Abgrund," and a split with Woid, weaving together abrasive black metal with bleak atmospheric passages.