The group consists of vocalist Rory Rodriguez, guitarist Gino Sgambelluri, bassist Ramone Valerio and drummer Zac Mayfield.

Dayseeker was formed in 2012 by vocalist Rory Rodriguez, guitarists Alex Polk and Gino Sgambelluri, bassist Andrew Sharp and drummer Mike Karle in Orange near Anaheim, California.

[11] In January 2015, the band announced they were to begin recording the follow-up to their debut album What It Means to Be Defeated with producer Nick Ingram, who had worked with Hotel Books and Before Their Eyes in the past.

The same day the same-titled lead single as well as the pre-orders were announced, the band released a cover of Nick Jonas' song "Jealous".

[18] In the fall of 2021, Oh, Sleeper drummer Zac Mayfield announced that he would be temporarily filling in for Mike Karle for the foreseeable future.

[21] Rodriguez confirmed the progress on a new album, stating that he has found himself immersed in the emotions that came with the loss of his father shortly after his daughter's unexpected birth.

[25] On February 14, 2024, the band announced Replica, an album containing acoustic versions of songs from Sleeptalk and Dark Sun, in addition to a cover of My Immortal by Evanescence.