Stagecoach Inferno is a Louisville, Kentucky heavy metal band formed in 2016, drawing on traditional metal with a hard-driving sound that evokes the rougher edges of the classic American metal underground.

Stagnant is an Illinois death metal band formed in 2012, delivering a murky, punishing brand of the genre with an oppressive atmosphere evoked even in the project's name.

Stagnated is a Cleveland, Ohio death metal band formed in 2017, grinding out dense, brutal death metal with the technical precision and scene awareness characteristic of the Great Lakes region's extreme metal community.

Stagnation is a Tempe, Arizona death metal band formed in 2011, channeling the crushing, midtempo weight of classic death metal in the tradition of the American Southwest's underground extreme scene.

Stahl Gorthorl is a black metal band from San Antonio, Texas, formed in 2014, practicing raw and misanthropic black metal rooted in the Nordic tradition with a distinctly underground aesthetic.

Springfield, Massachusetts' Staind became one of the biggest rock bands of the early 2000s with Aaron Lewis's raw, emotionally vulnerable vocal delivery and the band's ability to shift between crushingly heavy verses and achingly melodic choruses. Their 2001 album 'Break the Cycle' debuted at number one and produced the massive hit 'It's Been Awhile,' one of the longest-running number-one rock singles in chart history. Though Lewis's solo country career often overshadows the band's legacy, Staind's catalog represents some of the most emotionally direct and commercially successful hard rock of its era.

Stained Glory was a thrash/heavy metal band from Bogotá, Colombia, formed in 2008 and active as an independent act. They released the Machinery EP in 2011 and the Hate Corrodes EP in 2016 before splitting up.

Stainless is a Portland, Oregon heavy metal and speed metal band formed in 2008, delivering hard-charging, NWOBHM-influenced metal with a hard rock sensibility and a love of speed and melody.

Stake is a northeast Indiana sludge and groove metal band formed in 2019, combining the sludgy low-end heaviness of post-hardcore-influenced metal with the rhythmic, syncopated attack of groove metal.