TesseracT are a British progressive metal band from Milton Keynes, in England. The band was formed in 2003 and consists of Daniel Tompkins (lead vocals), Alec „Acle“ Kahney (lead guitar & producer), James Monteith (rhythm guitar), Amos Williams (bass, backing vocals), and Jay Postones (drums, percussion). The band is currently signed to Kscope. They are credited as one of the bands to pioneer the djent movement in progressive metal. Since 2018, Tesseract have released four studio albums: One, Altered State, Polaris, and Sonder, as well as a live album Odyssey/Scala, and the extended plays Concealing Fate, Perspective And Errai.