Sianvar is an American post-hardcore supergroup that emerged as a side project bringing together members from multiple well-known bands in the scene. The group was initially formed in 2013 and is constituted of vocal powerhouse Donovan Melero from Hail the Sun, guitarists Will Swan from Dance Gavin Dance and Sergio Medina from Stolas, along with bassist Michael Franzino from A Lot Like Birds. Their collective talent coalesces into a unique blend of experimental rock, marked by complex melodies and intricate, emotive lyricism.

The band made their debut with a self-titled EP in 2014, simply named "Sianvar," which received acclaim for its dynamic and sonically rich compositions. This was followed by their highly anticipated full-length album, "Stay Lost," which dropped in 2016. This release saw the band refining their sound, pushing the boundaries of their genre with sweeping guitar work and visceral energy. Sianvar's dedication to their craft continued to shine through their 2019 single "Omniphobia," showcasing their capacity for constant evolution and the fusion of their individual influences into a cohesive and compelling musical narrative. Despite their commitments to their respective bands, Sianvar has managed to create a distinct identity within the post-hardcore landscape, captivating listeners with their ambitious soundscapes and technical prowess.