Their third release in the span of two years, following Raw Data Feel in 2022 and a reissue of their debut album Man Alive in 2023, Everything Everything announced Mountainhead on 26 October 2023.

As opposed to their previous album which made use of artificial intelligence to create content, Mountainhead entirely avoids "plug-ins and effects".

[10] The "synthetic pop album" explores "notions of capitalism and social fracturing" from a futuristic point of view.

[11] Lead vocalist Jonathan Higgs explained that the album revolves around a simple concept, taking place in a fictional world "wherein all of society is consumed with the building of a giant mountain".

[10] In promotion of the album, the band embarked UK tour in March and April 2024, with festival appearances throughout the summer.