[3] Billboard senior editor Chuck Taylor referred to the song as a "beautifully performed, musically sophisticated outing that showcases a surprisingly emotional vocal from [Lavigne]."

"[5] Jamieson Cox of Pitchfork described the song as a power ballad and compared it to B-sides released by American rock band Aerosmith in the late Nineties.

[6] The arrangement of singles from Let Go, with "I'm with You" as the third, was regarded as "controversial choices", given that "I'm with You" was "thought by some to be the biggest potential smash on the album", and could have established Lavigne as a more mature artist if it was released first.

"[7][dead link‍] KidsWorld called it "the perfect song to drown your sorrows to when that guy from your class breaks your heart.

[12] The song was certified gold by Recording Industry Association of America in 2006 for sales of over 500,000 copies in the United States.

[2] Filmed in November 2002, most of the video is shown in slow motion but Lavigne's mouth movements are in sync with the song's vocals.

[citation needed] The video depicts Lavigne, who is seen alone, trying to find someone, whilst her band members play the song alone in the streets.

"I'm with You" was nominated for the 2004 Grammy Award for Song of the Year, and for Best Female Pop Vocal Performance but lost to Luther Vandross's "Dance with My Father" and Christina Aguilera's "Beautiful" respectively.

[32][33] Polish-Czech singer Ewa Farna covered the song and it was featured as a track on her album Měls mě vůbec rád.

British singer Yungblud covered the song as part of his segment for BBC Radio 1's annual Live lounge month.

He mashed-up the song with Taylor Swift's "Cardigan" (2020), accompanying himself on an acoustic guitar, joined by a cellist and two violinists, resulting in a cheerful, strings-laden performance.

[34][35] Scottish synth-pop band Chvrches covered the song in their Apple Music Home Session, released on September 24, 2021.