Turnstile release their fourth album, Glow On, on August 27, 2021, via Roadrunner. The record follows 2018's Time & Space and was produced by Brendan Yates with Mike Elizondo.

Glow On keeps hardcore's energy but incorporates groove, synth-pop, dream pop and danceable beats. Holiday, Mystery and Fly Again preceded the release, and Alien Love Call features Blood Orange.

The album was received as one of the year's best rock records and widened the band's audience, taking Turnstile to larger festivals and tours.