Insinerate are a thrash metal band from Havant, England, formed in 2016. They channel classic thrash metal aggression from the south coast of England.

Insolence is a thrash metal band from Erfurt, Germany, formed in 2017, delivering aggressive, riff-driven thrash from the Thuringian capital. The band channels the raw defiance suggested by their name into high-velocity metal.

Insolitary is a melodic death/thrash metal band from Sweden, active since 2015 and blending melodic harmonies with death metal aggression. The project channels the twin-guitar traditions of Scandinavian-influenced melodeath.

Insomniak is a thrash metal band from Giessen, Germany, active since 2010, forging over fifteen years of sleepless thrash from the Hessian university city. The band delivers relentless, high-energy thrash that lives up to its name.

Instable Collective is a thrash metal/hardcore band from Pisa, Italy, active since 2013 and fusing the aggression of thrash metal with hardcore punk's raw energy and attitude. The project delivers high-octane crossover fury.

Instant Death is a thrash/death metal band from Kraków, Poland, active since 2017 and merging death metal's heaviness with thrash's relentless velocity. The project delivers aggressive crossover fury.

InstinctHate are a groove and thrash metal band from Imst in the Tyrolean Alps of Austria, channeling the Pantera-descended groove metal tradition through tight riffing and an aggressive posture. The band self-releases material through their Bandcamp page as an independent act in the Austrian underground.

Instructor are a heavy/thrash metal four-piece from Salzburg whose music addresses pain, isolation, and social anger through dark, German-language lyrics. The band describes itself as serious and substantive, releasing material independently through Backstage PRO and their own channels.

Progressive/experimental thrash metal band from Grado in Asturias, active since 2009. Their playfully umlauted name signals an eclectic approach to thrash metal from northern Spain.