First Temple of the Atom is a doom/post-metal band from Glasgow, Scotland, formed in 2017. The band creates expansive, atmospheric doom and post-metal from Scotland's largest city.

Fissure of Riddles is a progressive/sludge/post-metal band from Weymouth, England, formed in 2014. The band merges progressive complexity with sludge and post-metal from the Dorset coast.

Flehmen is a post-metal/post-rock band from Voghera in the Pavia province of Lombardy, active since 2013. Their releases Casa Nera (2013) and Venus (2014) explore atmospheric, expansive soundscapes at the intersection of post-metal heaviness and post-rock introspection.

Flynotes is a progressive/post-metal/post-rock band from Saint Petersburg, Russia, active since 2011. They craft dynamic, compositionally ambitious music that moves fluidly between progressive metal complexity and post-rock atmospherics.

Fogdiver is a post-metal band from Brunswick, Germany, formed in 2013. The band creates dense, atmospheric post-metal soundscapes from the Lower Saxon city.

For the Storms is a doom/death/sludge band from Brescia, Italy, formed in 2021. Their releases The Grieving Path and Losing What's Left of Us chart a heavy, emotionally charged path through doom, death, sludge, and post-metal territories, with song titles mapping landscapes of loss and desolation.

Foreshadower is a doom/sludge/post-metal band from Copenhagen, Denmark, formed in 2019. The band layers doom metal's weight, sludge metal's grime, and post-metal's atmospheric expansion into dense compositions.

Forge of Clouds is an atmospheric sludge/post-metal band from Lubin in the Lower Silesian copper basin, active since 2011. Their evocative name captures the atmospheric, textural quality of their post-metal approach — heavy music shaped and reformed like clouds in an industrial forge.

Foscor is a band from Barcelona, Spain, active since 2004, who evolved from black metal origins into progressive post-metal and post-rock territory. Their two-decade journey reflects a constant transformation from aggression toward more expansive, atmospheric compositions.