What Is Klarna

Klarna is a Swedish fintech giant that made “buy now, pay later” (BNPL) mainstream. Founded in 2005 by Sebastian Siemiatkowski, by 2026 it serves 150+ million users in 45 countries and processes transactions for 500,000+ merchants.

Unlike traditional credit cards, Klarna offers buyers three interest-free payment options: pay immediately, split into 4 installments, or pay in 30 days. The merchant gets paid immediately — Klarna takes on the risk.