Flagg is a black metal band from Turku, Finland, formed in 2020. The band creates raw black metal from Finland's former capital on the southwestern coast.

Flagras is a black metal band from Kiel, Germany, formed in 2020. The band creates black metal from Germany's northernmost major city on the Baltic coast.

Flagrvm is a black metal project from Poland, formed in 2020. Their Latinized name — the Roman scourging whip — evokes the punishing, ritualistic character of their black metal from the Polish underground.

Flail is a black metal project from Finland, formed in 2018. The project channels the primal aggression of black metal.

Flak is a black metal band from Karlsruhe, Germany, formed in 2016. The band channels dark, aggressive black metal from the Baden city.

Flaktiin is a black/death metal band from Lisbon, Portugal, formed in 2016. They merge the raw hostility of black metal with death metal's crushing weight from the Portuguese capital's thriving extreme metal underground.

Flamekeeper is an epic heavy/power/black metal project split between Stockholm and Rome, formed in 2019. Their cross-continental approach merges Scandinavian and Italian metal traditions into epic, genre-spanning compositions.

Flamen is a melodic black metal project from Potenza in Italy's Basilicata region, formed in 2023. They bring melodic black metal sensibility to one of southern Italy's least represented regions in the metal underground, adding to the growing diversity of the country's extreme music landscape.

Flamen Martialis is a melodic black metal band from Nuremberg, Germany, formed in 2021. Named after the Roman priest of Mars, the band fuses classical and martial themes with melodic black metal.