Klarna’s U.S. Push Is Reshaping the Buy Now, Pay Later Battlefield
Klarna’s accelerating push into the U.S. market is creating real friction for Affirm, the buy now, pay later lender that has spent years building deep merchant integrations with some of America’s biggest retailers. The competition is no longer theoretical.
How Klarna Is Winning the Merchant Conversation
Klarna entered the U.S. with a consumer-facing app strategy, building a shopper base before aggressively pitching merchants on checkout integrations. That sequence mattered. By the time Klarna’s sales teams arrived at retailer conversations, they could point to an existing installed base of active shoppers – a number that carries weight when a merchant is deciding which BNPL provider to feature prominently at checkout. Affirm built its business in roughly the opposite direction, landing merchant partnerships first and acquiring consumers through those relationships. Both models worked, but Klarna’s approach gives it a specific kind of leverage in renewal and expansion talks.
The structural appeal Klarna offers merchants centers on a tiered product suite. Its zero-interest, short-cycle pay-in-four option competes directly with Affirm’s core product, while its longer-term financing and Klarna Card give merchants a single vendor to cover multiple payment needs. For a retailer managing a complex checkout stack, consolidating BNPL providers has operational appeal beyond just the economics. Fewer integrations, fewer reconciliation workflows, and a single merchant services relationship are real administrative incentives – and Klarna is actively selling that consolidation story.
Affirm’s agreements with large merchants like Walmart and Amazon have historically been exclusivity-adjacent arrangements, meaning Affirm received prominent placement in exchange for negotiated rates. Klarna’s presence complicates that dynamic. When a competing BNPL provider can demonstrate comparable or larger consumer reach in a given demographic, the merchant’s leverage in renegotiation increases. Affirm may find that the terms it locked in during earlier growth years become harder to maintain when retailers know there is a credible alternative sitting in the room.
Klarna’s reported IPO preparation adds another layer to the merchant competition. A public market debut – with the valuation story and capital access that comes with it – would give Klarna a currency to invest in merchant incentives, subsidized rates, and technology development that a private company has to be more conservative about. The timing pressure this creates for Affirm is real: if Klarna lists successfully and uses fresh capital to deepen merchant discounts or accelerate product development, the competitive gap becomes harder to close quickly.
Where Affirm Holds Ground and Where It Doesn’t
Affirm’s position is not weak uniformly across all merchant categories. In high-ticket, considered purchases – furniture, electronics, healthcare financing, travel – Affirm’s longer-term installment products with fixed interest and clear amortization schedules are genuinely differentiated. Consumers financing a $2,000 mattress or a $4,000 dental procedure are not the same as consumers splitting a $90 clothing order into four payments. Klarna’s core strength sits closer to the fashion, beauty, and everyday retail segments where transaction sizes are smaller and the pay-in-four mechanic fits naturally.
The problem for Affirm is that the fashion and everyday retail segment is not a niche. It represents a significant volume of consumer BNPL transactions, and the merchants in that space are precisely the ones Klarna is targeting most aggressively. A mid-sized apparel retailer or a direct-to-consumer brand evaluating BNPL partners today has a genuine choice between the two, and Klarna’s consumer app drives enough organic discovery that merchants see it as free marketing traffic alongside the payment functionality. Affirm does not have a comparable consumer app ecosystem pulling shoppers into merchant discovery.
Affirm has tried to address the consumer-facing gap through its Affirm Card, a debit card that lets users apply BNPL terms to purchases after the fact. The product is clever in concept – it decouples BNPL from the checkout moment and gives Affirm a wallet-like presence in consumers’ daily spending. But building consumer habit around a financial product is slow, and Klarna has a years-long head start in European markets that gave it the operational playbook to execute that kind of consumer engagement at scale before arriving in the U.S.
There is a specific merchant tier that represents the most contested ground: mid-market U.S. retailers with annual e-commerce revenues in the range where both providers actively pursue exclusive or preferred placement deals. In that tier, Affirm’s longer track record and domestic regulatory familiarity historically won conversations. Klarna’s willingness to offer aggressive merchant fees to gain market share entry points is now disrupting that calculus. A retailer being offered materially lower merchant discount rates by Klarna, even for a trial integration, has a straightforward financial reason to test the alternative.
Affirm’s CEO Max Levchin has publicly framed the company’s differentiation around credit underwriting quality and responsible lending practices – arguing that Affirm’s approach to installment lending is more transparent and better suited to consumers who actually need a structured repayment plan. That framing is credible as a brand positioning story, but merchants ultimately make integration decisions based on conversion lift, transaction volume, and economics. Whether underwriting philosophy moves that needle at the contract negotiation table is genuinely unclear.
The Checkout Real Estate Problem
Checkout pages have limited real estate. Most major retailers feature one or two BNPL options prominently – more than that creates cognitive friction for shoppers and dilutes conversion for all providers. That constraint means every merchant Klarna wins preferred placement with is, by definition, a merchant where Affirm moves to secondary status or disappears from the checkout flow entirely. The math is zero-sum in a way that abstract market share figures do not fully capture.
Affirm’s next earnings calls will be watched for any signals of merchant churn, renegotiated rate terms, or a slowdown in new merchant additions – metrics that would give the clearest external indication of whether Klarna’s expansion is translating from competitive noise into actual business displacement. The merchant count number Affirm reports each quarter has been a key growth indicator; if it stalls while Klarna’s grows, the story becomes harder to dismiss as competitive theater. Affirm currently counts over 300,000 active merchants, a number that has been a point of pride – and a number that now has a visible challenger counting upward toward it.
