O'Brien of Yahoo! Celebrity honed the song as "the perfect mix of old and new" and "a future deep house classic", further highlighting the track's bassline as "the thickest and most addictive bassline you're likely to hear this year". O'Brien went on to praise Kiesza vocal performance on the song, lauding it as a "powerhouse" and "impressive", and felt that "Hideaway" would continue the run of "classy dance anthems" topping the charts in 2014. Daily Record music critic John Dingwall awarded the track a five (out of five)-star rating, commenting, "despite the fact that we're in the first flushes of spring, Hideaway already looks on course to be one of the biggest songs of the summer and there's no disputing that it is a top-class dance tune." While Huw Oliver from DIY Weekly hailed the song as energetic, "splashy" and a "brilliant house-pop thrill ride". Chart performance "Hideaway" debuted at number one on the UK Singles Chart issued for April 26, 2014, replacing Sigma's "Nobody to Love" at the chart summit. It sold 136,000 copies in its first week, making it the third fastest-selling single of 2014 in the United Kingdom, behind Clean Bandit's featuring Jess Glynne's "Rather Be" (163,000) and Pitbull featuring Kesha's "Timber" (139,000). Upon this result, Kiesza told the Official Charts Company, "Being number one is the most amazing feeling ever, I just want to say thank you to everybody who's supported it," adding, "I never expected this at all when I created 'Hideaway'; it's amazing to see people come out the woodwork and fall in love with it, so thank you!" The single dropped to number two after selling 59,704 copies in its second week on the chart, accumulating a total of 195,990 copies sold in the United Kingdom as of April 28, 2014. Elsewhere, in the Republic of Ireland, the song entered at number 21 on the Irish Singles Chart for the week ending April 17, 2014 and has since held the position for two consecutive weeks. The single debuted at a position of number 58 on the Swiss Singles Chart on April 20, 2014, dropping ten places to number 68 in its second week. In the Flanders region of Belgium, "Hideaway" entered the Ultratip chart at number 72 on April 19, 2014 and has since peaked at a position of number 14. While in Belgium's Wallonia region, the song debuted at number 43 on