In June 2023, Bayona announced that Michael Giacchino would compose the musical score for Society of the Snow, after their previous collaboration on Jurassic World: Fallen Kingdom (2018).

[1][2] It was Giacchino's first Spanish film, which Bayona felt that his music "brings a special voice and energy that turns the Andes odyssey into an even more relevant, encouraging and universal story".

[1] Giacchino has said Society of the Snow was the most emotional film he had worked on to date, following Pixar's Up (for which he had won an Academy Award), due to the dread, isolation and helplessness of the survivors.

[7] Guy Lodge of Variety described it as "a typically maximalist score from Michael Giacchino that throws frantic percussion and a keening choir in alongside the ample strings".

[8] Amon Warmann of Empire wrote "Regular Bayona collaborator Michael Giacchino accentuates proceedings with a score that alternates between haunting horror chords and moving melodies.