# Sebastian Siemiatkowski

> Sebastian Siemiatkowski is co-founder and CEO of Klarna, the Swedish BNPL and consumer finance company.

Source: https://www.neobank.wiki/wiki/sebastian-siemiatkowski
Last updated: 2026-08-11
Categories: Financial technology, Fintech founders, People in fintech, Neobank founders

**Sebastian Siemiatkowski** is co-founder and chief executive officer of [Klarna](/wiki/klarna). He co-founded Klarna in Stockholm in 2005 and remains its public face.[^fn1]

## Career

With Niklas Adalberth and Victor Jacobsson, Siemiatkowski built Klarna into a global buy-now-pay-later leader and later pursued banking licences and a broader consumer shopping/finance app.

## Klarna

Sebastian Siemiatkowski is principally associated with [Klarna](/wiki/klarna). See that article for products, licensing and market context.

## Infobox

- **Occupation**: Fintech founder
- **Known for**: Klarna CEO / co-founder
- **Company**: Klarna
- **Founded company**: 2005
- **Associated HQ**: Stockholm, Sweden

## Frequently asked questions

### What is Sebastian Siemiatkowski?

Sebastian Siemiatkowski is co-founder and CEO of Klarna, the Swedish BNPL and consumer finance company.


## References

[^fn1]: Sebastian Siemiatkowski is a founder of Klarna, covered on neobank.wiki. — https://neobank.wiki/wiki/klarna