Kustom, formerly Klarna Checkout, is one of Europe’s leading checkout solutions.
If you have been a Klarna Checkout customer before, no technical changes are needed and your current integration will continue to work as usual without requiring any technical changes.

Please reference the publicly available documentation for the B2B integration of Klarna Checkout which by now has become synonymous to the new Kustom Checkout documentation here.

Once Billie via Kustom is integrated, customers can select Billie's payment methods at the checkout. Kustom handles business customer identification by signaling the customer type: "organization" during session creation. Billie's integration via Kustom Checkout uses the same logic and API as the B2C integration of Kustom Checkout but requires a few changes to the fields to ensure a successful integration of Billie.

Find more information around the connection between Kustom, Klarna an Billie here.