Released in November 1993 as the lead single from his album Kickin' It Up, and accompanied by a music video directed by Marc Ball, Montgomery's version spent four weeks at number-one on the U.S.

The cover by All-4-One was subsequently released in April 1994, becoming a number-one hit in numerous countries, and later garnering a spot in Billboard's ranking of All-Time Top 100 Songs.

Released on April 22, 1994,[9] by Blitzz and Atlantic, All-4-One's version reached number one on numerous music charts, including the US Billboard Hot 100, where it remained for 11 consecutive weeks.

[11] An editor, Larry Flick, wrote, "Follow-up to the gold-selling "So Much in Love" once again spotlights this male quartet's seamless harmonies.

Producer David Foster supplies soft and pillowy synths, a caressing sax solo, and an overall splash of drama, which complements the unabashed romance of this hit-bound ballad.

[13] Dave Sholin from the Gavin Report complimented the producer that "polishes it up just right for pop audiences who, like their country counterparts, will soak in the lyrics."

He added, "Those contemplating matrimony will no doubt have this played while they're walking down the aisle, and those who've already tied the knot might want to renew their vows just so they can make "I Swear" part of the ceremony.

[15] In his weekly UK chart commentary, James Masterton wrote, "Labelled by many as this year's "End of the Road" you can see what all the hype is about.

Now the vocal harmony quartet halfway between Shai and Boyz II Men polishes John Michael Montgomery country number 1 hit.

[83] The Brazilian version of the song I Swear, titled Eu Juro, was performed by the popular sertanejo duo Leandro & Leonardo.