The band entered the studio without any demos recorded and only had lyrics from Lifehouse lead singer Jason Wade.

The album received positive reviews from critics, and peaked at number fourteen on the Billboard 200, selling 49,000 copies in its first week.

The third single, "Broken" was released January 8, 2008, and had commercial success in the United States and Canada, and eventually other countries.

[3] When asked about creating a song for the album, Lifehouse lead percussionist Rick Woolstenhulme, Jr. said, "Nobody really knew what they would be playing.

I had to dig a little for that one, but I find myself at a place where I can write stuff that's a little deeper than your average love song in terms of emotion.

"[8] Wade was inspired to write "The Joke" after he read a newspaper article that detailed the story of a British boy who hung himself as a result of being bullied by his fellow schoolmates.

[11] It also appeared on the Billboard Mainstream Top 40, Hot 100 Airplay, Digital Songs, and Adult Contemporary charts.

[17] Stephen Thomas Erlewine of Allmusic described the album as "post-alternative guitar rock preserved in amber, all shallow angst and earnestness, communicated through music that surges without hooks.

"[18] Alex Lai of Contact Music called "the ballads on this record amongst the best the band has produced" and further commented that "[the album] is very well balanced and though far from groundbreaking, show that Lifehouse have returned to their consistent best.

"[20] In the United States, Who We Are debuted and peaked at number fourteen on the Billboard Hot 200, selling 49,000 copies in its first week.

[23] It debuted and peaked at number eighteen on the Billboard Alternative Albums chart and stayed there for ten non-consecutive weeks.

[26] In support of Who We Are, Lifehouse went on the "Disarray Tour", which was highlighted by dates in Los Angeles, Chicago, New York City, and Atlanta.

[27] American singer-songwriter Matt Nathanson and HoneyHoney joined Lifehouse on select dates throughout the tour.

[28] Lifehouse continued to promote the album on Last Call with Carson Daly on July 9, 2007 where they played "First Time".