[12] Jason Heffler from EDM.com praised Harris and Goulding stating that their "latest anthem "Free" reinforces the fact that some artistic partnerships are simply destined for greatness".

[4] ThatGrapeJuice called "Free" an "electrifying anthem", and praised the blending of Goulding's ethereals vocals with Harris production "making it an instant hit for the summer".

[15] On October 12, "Free" topped the US Dance/Mix Show Airplay, making Harris the artist with most number ones singles on the chart, with sixteen, breaking a tie with David Guetta.

[18] Harris' unveiled the track for the first time during his DJ set at Ushuaïa Ibiza, he shared a preview to his Instagram account with the caption: "Trying out the new one @ushuaiaibiza!".

[19] On July 20, Goulding made a surprise appearance at Harris' Ushuaïa set to perform "Free" live for the first time.