And now the company has hired Cleary Gottlieb Steen & Hamilton, a top American law firm, to advise it on early-stage preparations for a possible listing, according to reports.
Stripe is reportedly considering a direct listing like that of financial tech firm Wise, which floated this week and is now worth nearly £10billion.
This means it would directly list existing shares on the stock market – without raising money by issuing new ones.
A listing would make Patrick, 32, and 30-year-old John a huge fortune overnight. They had already found success before Stripe, becoming millionaires in 2008 when selling their previous business Shuppa aged just 19 and 17.