In a review for Slant Magazine, Sal Cinquemani described the song as "a bit of new wave-inflected computer pop (think B-52s meets Erasure) that finds Alison's faith in Cupid restored.

"[2] Ian Wade of BBC Music stated that "the stupendous 'Believer', with its stadium-sized chorus, appears like a turbo-charged Fleetwood Mac.

"[3] Heather Phares of AllMusic commented that the song "sounds instantly familiar, but not tired or obvious",[4] and Digital Spy reviewer Nick Levine wrote that "the synths on 'Believer' bounce along like vintage Erasure.

"[5] The Independent's Andy Gill opined that the song, "with its childlike lyric [...] set to a basic Eighties' synth riff, is exactly in step with retro-electropop fashion.

"[6] The music video for "Believer" was directed by Lisa Gunning and consists of live footage from the Head First World Tour.