Case Study: Klarna migrates nearly three million cards to Marqeta with zero downtime
Key results
The challenge
As one of the world's leading fintechs, Klarna sought to migrate its card program to a modern, API-first issuer processor while scaling globally. The migration spanned Sweden, Germany, and the UK and covered both debit and credit products in multiple currencies, with zero customer downtime treated as non-negotiable from the start.
The solution
Klarna moved its program to Marqeta's cloud-native platform using a phased migration with BIN segmentation, staged rollouts, and a validation pilot. Marqeta's migration engine transferred PCI card data, tokens, PII, security keys, and BIN information, supported by on-site collaboration in Stockholm and joint troubleshooting sessions.
“It was a huge investment, but worth it. Marqeta's partnership made us more confident in a smooth migration.”
GBGuillermo Barredo GarcíaSenior Engineering Manager, Card and Banking, Klarna
The results, in context
Klarna completed a migration of nearly three million cards across Sweden, Germany, and the UK with zero customer-facing downtime. Following the migration, Klarna reports faster feature rollouts and the ability to self-serve many program changes via Marqeta's APIs.