Mach-Hommy is an American rapper and record producer. He is known for concealing his real name and face in all public appearances, a practice that has led him to be described as "one of hip-hop's most elusive artists".

Mach-Hommy has gained a cult following as a result of his work ethic and sense of mystery. His lyrics are often heavily related to the social and political history of his Haitian heritage. Though he predominantly raps in English, he also frequently incorporates Haitian Kreyòl into his lyrics. He disallows his lyrics from being posted on lyric sites, describing such republishing as the sites "monetizing" his work, and he charges hundreds and even thousands of dollars for his releases, many of which are not available on streaming services.

Mach-Hommy was raised predominantly in Newark, New Jersey, but also spent much of his childhood in Port-au-Prince. His father was a folk guitarist, and Mach credits his father's musical style as an influence on his own. The first music Mach recorded was at the age of 13, when he performed a freestyle over the beat to Raekwon's "Verbal Intercourse".

In his early career, Mach found the music recording process to be an "unhealthy" environment and sought to take up filmmaking instead. However, at the encouragement of several Griselda members, he performed a verse for the song "Beloved", which motivated him to begin rapping again.

Mach-Hommy first received widespread attention after the release of his 2016 album, H.B.O. (Haitian Body Odor), which he sold via Instagram. Mach pressed only 187 copies of the H.B.O. CD and sold them for $300 apiece, before eventually uploading the album to SoundCloud in 2017. He released numerous other albums in the following years, many of which were sold at high prices through services like Bandcamp and never released on streaming services.

In 2021, Mach-Hommy released his album Pray for Haiti on most streaming services. Mach stated that he would donate his share of profits from the album to the Pray for Haiti Trust Fund, a charity he established to fund educational services and institutions in Haiti. Pray for Haiti also brought Mach a greater level of attention from the music press, with Pitchfork honoring the album with a "Best New Music" award and Rolling Stone describing it as "a modern hip-hop classic".

Mach-Hommy has intermittently associated with the Griselda Records label. Though Mach was once considered part of the Griselda collective, he separated from them after a falling-out with Westside Gunn, and as of 2017 Mach-Hommy was unaffiliated with the label. Mach and Gunn eventually reconciled in late 2020, as Westside Gunn served as an executive producer of Pray for Haiti.

On May 17, 2024, Mach-Hommy independently released #Richaxxhaitian. The album contained features from Kaytranada, 03 Greedo, Roc Marciano, and Black Thought, among others. The album received positive reviews from critics.

In an interview with Billboard, Mach stated that he speaks every Romance language. He is also an avid fisher and hunter.