Hailing from St. Clair Shores, Michigan, Aftermass is a thrash metal band. The band has released their single "Untitled."

Based in Chicago, Illinois, Aftermath plays thrash metal. The band has released their single "Untitled." Their sound emphasizes technical precision and compositional complexity.

AfterShock is a thrash metal band with roots in Honolulu, Hawaii, later based in San Francisco. Their 2020 full-length "RiSk - High-Risk Behavior" brings an island-to-mainland thrash metal attack across eleven tracks.

Against All is a thrash metal and hardcore band from Tampa, Florida. Their 2020 full-length "2017-2019" compiles the band's formative years into a single release of crossover aggression.

Age of Apocalypse is a New York hardcore band that incorporates heavy and thrash metal into their breakneck attack. Their 2025 full-length "In Oblivion" arrived on Closed Casket Activities and cemented the band's reputation as one of the hardest-hitting acts in modern NYHC.

Age of Fire is a heavy and thrash metal band that started in South Florida before relocating to Charlottesville, Virginia. With six releases spanning 2019 to 2025 — including a 30th anniversary reissue — the band is a veteran act that has persisted through decades and geography changes.

California/Philadelphia grindcore and thrash project. The politically charged name channels contempt through cross-country extremity.

Los Angeles/Tampa thrash metal legends who helped pioneer the speed metal movement in the 1980s. One of the most important bands in the early LA thrash scene.

Agent X is a thrash metal band from Amherst, New York. Their 2023 full-length "The War Will Feed Itself" delivers eight tracks of politically charged thrash from the Buffalo suburb.

Agentz of Khaos is a groove, death, and thrash metal band from Harrison, Arkansas. Their 2021 single "Khaos Reigns" introduces the band's blend of groove-driven heaviness from the Ozarks.

Agga is a thrash and black metal band from Naples, Florida. Their two 2023 EPs draw from ancient Sumerian mythology — "By the Fiery Scimitar of Shammash" and "Sumerian Tablets - The Origins of Human Creation" — wrapping historical mysticism in aggressive thrash-black metal.

Aggravated Assault is a thrash metal band from Fairfield, California. Their 2025 live recording from Transplants Brewing captures the raw energy of a thrash band in their element — playing a Christmas show at a local brewery.

Old-school thrash in the Kreator/Slayer vein, formed in 2008. Invited to play Inferno Festival in Oslo off the strength of their early demos.

Aggression Core is a thrash metal band from Seattle, Washington. Their 1995 EP "Dead God" is a six-track relic of the mid-90s Pacific Northwest thrash underground, predating the era when grunge had all but eclipsed metal in the region.

Aggressor is a thrash metal band from Boston, Massachusetts. Their 2018 demo captures three tracks of raw, unpolished thrash from the New England underground.