[3] Carolyn Menyes from Music Times called the song "emotional" describing "I Know You" as "a mid-tempo piano ballad with a pulsing beat, yearning lyrics and dripping, high vocals".

[4] Hayley Spencer from InStyle wrote "[the song] is a haunting piano ballad about convincing your lover to let go of the past and fully commit".

[6] Eliza Thompson from Cosmopolitan described the song as "a slow, piano-based ballad about convincing your lover to let go of his past and just be chill".

[8] Emilee Lindner of MTV stated "Grey sings sweetly and achingly for her lover to fully commit, telling him “I know you, baby.” It's as if they've been through it all before and she just wants to be in love without complications".

[2] On February 10, Skylar confirmed that there would be a release of a visual music video for the song as she posted a picture from the set on her Instagram account.