[4] The album received positive reviews from music critics, who celebrated the record's mature sound, and his autobiographic and introspective lyrical content.

[8] "I Took a Pill in Ibiza" was released as a single on July 24, 2015, and found international success in a remix by Seeb.

[16] David Jeffries of AllMusic noted an improvement for Posner in the album, writing, "This might not yet be the ultimate showcase for his talents, but At Night, Alone is both a welcome return and a significant step forward."

It is truth in advertising, an album exclusively optimized for solitude spent immersed in deep thought."

Gwilym Mumford of The Guardian wrote, "Some curios apart—the a cappella revolutionary hymn 'Only God Knows' and rowdy folk-punk of 'Jade'—there is little here that lingers long in the memory, with only Posner's braggadocio and pinched vocals distinguishing him from the singer-songwriter crowd."