Affirm partners with Stripe to bring BNPL services to businesses that use Stripe, following Affirm's recent partnerships with Shopify, WooCommerce, and others
Two fintech giants are partnering up. — Affirm is making its buy now, pay later technology available to businesses who use Stripe's payments tech.
Context & Ripple Effects
Affirm's growth playbook has been distribution through other companies' checkouts: it first reached merchants via its 2020 Shopify partnership, then landed a marquee anchor with Amazon rolling out monthly installments over $50 in 2021. The Stripe deal extends that model from individual commerce platforms to the payments infrastructure layer itself.
The wrinkle is that Stripe is not new to BNPL — it partnered with Klarna back in 2021 for US, UK, and European retailers, and Klarna deepened that tie with a 2025 expansion to 26 countries ahead of its US IPO. Affirm is therefore plugging into a channel where its chief rival already sits, making Stripe's merchant base a contested shelf rather than open territory.
First-order effects
- Businesses running on Stripe gain one-integration access to Affirm's installment plans, adding a second major BNPL lender alongside Klarna at the point of enabling payments.
Second-order effects
- Affirm and Klarna now compete inside the same Stripe checkout stack, pushing both toward better merchant terms and placement to win default status, while Stripe strengthens its gatekeeper position by deciding which lenders reach its merchants.
Third-order effects
- If BNPL keeps consolidating behind payments platforms, lender economics shift toward whoever owns the integration layer — platforms like Stripe capture the distribution margin while BNPL firms compete as interchangeable funding options on top of it.
The trend: Buy now, pay later is migrating from direct merchant integrations to distribution through payments-infrastructure gatekeepers like Stripe, which increasingly decide which lenders reach merchants.