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E-Commerce · head to head

Klarna vs Swell Commerce

Klarna logo

Klarna

E-Commerce

Buy now pay later and instalment checkout for online and in-store merchants

From
On request
Rated
-
Full reviewWebsite
Swell Commerce logo

Swell Commerce

E-Commerce

Headless ecommerce for modern brands

From
$29/month
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Klarna merchant fees for the short-term products run around 5.99% plus a fixed fee in the United States, roughly double a standard card rate, so unless Klarna measurably lifts average order value or conversion it is a straight margin loss.; Swell Commerce each plan carries an annual revenue ceiling, and exceeding it is charged as a percentage of the excess: 2 percent on Starter down to 0.4 percent on Unlimited
  • They diverge on capability: Klarna covers Pay in 4, Swell Commerce covers Headless architecture.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Klarna and Swell Commerce actually diverge.

Attributes where Klarna and Swell Commerce differ
AttributeKlarnaSwell Commerce
Starting priceOn request$29/month
Pricing modelquotesubscription
PlatformsWeb, iOS, AndroidWeb
FoundedUnknown2019

Identical on both: free tier (No), user rating (Not yet rated), category (E-Commerce).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Klarna

  • Pay in 4
  • Pay in 30 days
  • Longer-term financing
  • Klarna app placement
  • Klarna Checkout
  • In-store payments
  • On-site messaging
  • Merchant portal

Only in Swell Commerce

  • Headless architecture
  • GraphQL & REST APIs
  • Subscription commerce
  • Multi-currency support
  • Inventory management
  • Custom checkout
  • Webhook integrations
  • Developer-friendly SDK

What people use each for

The jobs each tool is most often brought in to do.

Klarna

  • A fashion or furniture retailer with average order values high enough that a 3% fee uplift is repaid by a larger basketnot Swell Commerce
  • A merchant selling to younger shoppers who have low credit card penetration and would otherwise abandon at checkoutnot Swell Commerce
  • A European retailer wanting a single hosted checkout that handles instalments, invoice and card in one flownot Swell Commerce
  • A brand that wants distribution inside Klarna's shopping app as an acquisition channel rather than only a payment optionnot Swell Commerce

Swell Commerce

  • Running a headless commerce backend with APIs for a custom storefrontnot Klarna
  • Selling subscription products alongside one off purchasesnot Klarna
  • Operating multi currency stores from one commerce backendnot Klarna

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Klarna

  • Merchant fees for the short-term products run around 5.99% plus a fixed fee in the United States, roughly double a standard card rate, so unless Klarna measurably lifts average order value or conversion it is a straight margin loss.
  • Rates are negotiated and unpublished, which means small merchants pay the standard rate while large ones negotiate down, and you cannot benchmark what you are being charged without going to market.
  • Returns and partial refunds are handled through Klarna's systems rather than your payment processor, so your finance team reconciles a second settlement flow and customer service handles a second dispute process.
  • Buy now pay later is being brought under consumer credit regulation in the UK, the EU and Australia, which is already changing affordability checks and disclosures; the checkout experience that converts today may be legally required to add friction.
  • Klarna owns the post-purchase relationship, sending payment reminders and marketing in its own name, so a shopper who has a poor collections experience associates it with your brand while you have no control over the messaging.

Swell Commerce

  • Each plan carries an annual revenue ceiling, and exceeding it is charged as a percentage of the excess: 2 percent on Starter down to 0.4 percent on Unlimited
  • Starter at $29 a month allows 2 admin users and includes only 100,000 API requests and 1GB of storage per month
  • Additional API requests cost $5 per 100,000 and extra storage $5 per GB
  • Role based permissions and developer support are restricted to the Unlimited plan at $2,250 a month
  • Advanced reports and priced currencies require the Standard plan or higher
  • Published prices are the billed yearly rates, so monthly billing costs more

Pricing, plan by plan

Klarna

On request
  • Klarna for Business$undefined/year
    • Per-transaction percentage plus a fixed fee, negotiated by merchant
    • No published rate card; rates vary by market, product and volume
    • Short-term products priced materially above card interchange

Swell Commerce

$29/month
  • Starter$29/month
    • Up to $50K annual revenue
    • Basic reports
    • Up to 5 admin users
  • Basic$79/month
    • Up to $250K annual revenue
    • Most popular plan
    • Basic reports
  • Standard$299/month
    • Up to $1M annual revenue
    • Advanced reports
    • Up to 15 admin users
  • Unlimited$2250/month
    • Up to $5M annual revenue
    • Unlimited scalability and granular control
    • Unlimited admin users

Which should you pick?

Choose Klarna if

  • You need pay in 4.
  • You work on Web, iOS, Android.
  • You also want pay in 30 days.
Klarna review

Choose Swell Commerce if

  • You need headless architecture.
  • You also want graphql & rest apis.
Swell Commerce review

Questions people ask

Is Klarna or Swell Commerce better?
Neither clearly leads. Klarna starts at On request and Swell Commerce at $29/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Klarna or Swell Commerce?
Klarna starts at On request and Swell Commerce at $29/month.
Does Klarna or Swell Commerce run on more platforms?
Klarna runs on Web, iOS, Android. Swell Commerce runs on Web.
What is Klarna best used for?
Klarna is most often used for a fashion or furniture retailer with average order values high enough that a 3% fee uplift is repaid by a larger basket, a merchant selling to younger shoppers who have low credit card penetration and would otherwise abandon at checkout, a european retailer wanting a single hosted checkout that handles instalments, invoice and card in one flow, a brand that wants distribution inside klarna's shopping app as an acquisition channel rather than only a payment option. Of those, a fashion or furniture retailer with average order values high enough that a 3% fee uplift is repaid by a larger basket and a merchant selling to younger shoppers who have low credit card penetration and would otherwise abandon at checkout are not what Swell Commerce is typically brought in for.
What can Klarna do that Swell Commerce cannot?
Klarna covers Pay in 4, Pay in 30 days, Longer-term financing, Klarna app placement. Swell Commerce covers Headless architecture, GraphQL & REST APIs, Subscription commerce, Multi-currency support.

Answered from the vendors’ own pages

Klarna: What does Klarna cost a merchant?

Klarna does not publish a rate card. In the United States most merchants pay around 5.99% plus $0.30 for short-term products, with longer-term financing nearer 3.29% plus $0.30, and large merchants negotiate lower.

Swell Commerce: How much does Swell Commerce cost?

Swell offers four tiers starting at $29 per month for Starter and going up to $2,250 per month for Unlimited. Annual billing provides a 25% discount compared to monthly billing. All prices are in USD.

Source
Klarna: Does the merchant carry the credit risk?

No. Klarna pays the merchant the full amount less fees and takes the risk of the shopper not paying.

Swell Commerce: What are Swell's revenue tier overages?

Each plan includes a revenue ceiling based on 12-month trailing sales. Starter allows up to $50K with 2% overage, Basic allows $250K with 1.5% overage, Standard allows $1M with 1% overage, and Unlimited allows $5M with 0.4% overage. Custom plans are available for merchants exceeding $10M annually.

Source
Klarna: Can I use Klarna alongside my existing processor?

Yes. It is normally added as an additional payment method through Shopify, Adyen, Stripe or a direct integration rather than replacing your card acquirer.

Klarna: Is Klarna still independent?

Yes. It listed on the New York Stock Exchange in September 2025 and holds a Swedish banking licence.

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