A study Stripe ran last year found businesses offering BNPL as a payment method generated up to 14% more revenue from increased conversion and higher average order values.

"We've seen BNPL volume grow 172% last year on Stripe, which is much faster than other mainstream payment methods," Jeanne Grosser, chief business officer of Stripe, told CNBC, adding that the deal with Klarna was a "win-win" for both firms.

Stripe has long been speculated to be a near-term IPO candidate — for its part, though, the company says it's in no rush. The company, also a victim of a slump in fintech valuations, slashed its valuation to $50 billion in 2023 from $95 billion in 2021. The company's valuation reportedly rebounded to $70 billion, as part of a secondary share sale.