Flammae is a black metal project from Warsaw, Poland, formed in 2023. Their Latin name — meaning 'flames' — signals the incendiary spirit of their black metal from the Polish capital.

Flammenkvlt was a post-black metal band from Salzburg, Austria, active from 2020 to 2021. In their brief existence they contributed the track "A Song Against the Void" to the Austrian Metal News Vol. 1 compilation (Running Wild Productions, December 2021), which served as a document of the contemporary Austrian extreme metal underground.

Flammentod is a black metal band from Schwalmstadt, Germany, formed in 2022. The project's name — German for "death by fire" — conveys the scorching intensity of their black metal.

Flauros is a black metal band from Joensuu, Finland, active since 2001. Named after the Great Duke of Hell, the band has spent over two decades forging black metal from eastern Finland.

Flaygoth is a black/Viking metal band from Moscow, Russia, active since 2010. They merge the atmospheric sweep of Viking metal with black metal's hostility, channeling Norse themes from the Russian capital.

Fleam is a black metal project from England, formed in 2020. The project creates atmospheric black metal from the English underground.

Fleckentarn is a raw black metal/punk project from Paris, France, formed in 2023. Named after the German camouflage pattern, the project merges raw black metal with punk energy.

Flegethon is a black/death metal project from Athens, Greece, active since 2001 and operating in the Hellenic extreme metal underground. The project delivers dark, intense black and death metal from the Greek capital.

Flegeton Valve is a black metal band from Turku, Finland, formed in 2015. The band channels dark black metal from the southwestern Finnish city.