"Stay" debuted at number one on the
ARIA Singles Chart for the week of 19 July 2021. It became Laroi's second number-one single in Australia after "
Without You" topped the chart for a week in May and Bieber's fifth as a lead artist. It held on to its position for 14 consecutive weeks,
becoming the longest-running number-one single of 2021. In January 2022, the song returned to the number one spot following the
2021 Triple J Hottest 100's announcement and remained there for three additional weeks. Its 17-week reign became the longest run at the top of the ARIA Singles Chart by a male artist(s) and the second-longest overall. The song spent more weeks at number one than any other by an Australian male, maintaining that position for 11 non-consecutive weeks. In the United Kingdom, "Stay" entered at number five on the
UK Singles Chart on 16 July 2021 – for the week ending dated 22 July 2021 – making it Laroi's second top ten hit in Britain and Bieber's 27th. It rose three places to number two a week later, behind
Ed Sheeran's "
Bad Habits" during its fourth week at the summit. It stayed at number two for six weeks and became Laroi's joint-highest-charting song in the UK along with "Without You". In Ireland, "Stay" entered at number three on the
Irish Singles Chart as the week's highest new entry. The track became Bieber's 60th top 50 single in the Irish Republic. The song moved up a spot the following week to a new peak of number two behind "Bad Habits" for eight weeks, becoming Laroi's highest-charting song in Ireland. In the United States, "Stay" debuted at number three on the
Billboard Hot 100, starting with 34.7 million streams, 12.9 million in radio audience, and 12,000 in sales. It entered atop the
Streaming Songs chart, becoming Laroi's first and Bieber's sixth leader there, and at number five on the
Digital Song Sales chart. On the week of 14 August 2021, the song topped the
Billboard Hot 100, dethroning
BTS' "
Butter" and becoming Laroi's first and Bieber's eighth number-one hit on the chart. It stayed at the number-one position for four consecutive weeks, surpassing "
Sorry" as Bieber's longest reign as a lead artist. The song also became Laroi's first number one on the
Pop Airplay chart (where it went on to spend 13 weeks at #1, the second longest run at #1 in the history of the chart, behind
Ace of Base's "
The Sign"), while Bieber tied
Bruno Mars for the most number ones on the chart among solo males with nine each. The song spent seven non-consecutive weeks at number one on the Hot 100. It additionally logged 14 non-consecutive weeks at number two of the Hot 100. As of the chart dated 2 April 2022, "Stay" also broke the records for the most weeks spent in the Hot 100's top two and top three spots, with 21 and 23 weeks respectively. On 18 April 2022, "Stay" became the first song in history to spend its first 40 weeks consecutively in the top 10 of the Hot 100. On 23 June 2023, the song was certified diamond by the
Recording Industry Association of America (RIAA). It spent seven straight weeks at number one on the chart, becoming just the third song to do so after
Roddy Ricch's "
The Box" and Rodrigo's "Good 4 U". The track was named "2021's Song of the Summer" by
Variety based on a song project report from Alpha Data, where it earned 1.5 million units. As of 28 October 2021, the song has accumulated 1.1 billion in airplay audience and 537.6 million U.S. streams and has sold 177,200 downloads. "Stay" additionally topped the charts in Austria, Finland, Portugal, The song ascended to number one on its third week with 75.1 million streams and 13,900 in sales, making it Laroi's first leader on the chart and Bieber's second after "
Peaches". It later topped the
Billboard Global Excl. U.S. on the chart dated 21 August 2021, dethroning "Bad Habits". The song was the longest-reigning number one on the Global 200, at the time and the first to lead it for double-digits, spending a total of eleven weeks at the top of the chart. On 4 November 2021, the song reportedly reached one billion streams on
Spotify, becoming the fastest to do so in 118 days and surpassing the previous record held by Sheeran with "
Shape of You" in 153 days. "Stay" was the most-streamed song globally on
Apple Music in 2022. ==Music video and lyric video==