Softwr

Accounting · head to head

Adyen vs Affirm

Adyen logo

Adyen

Accounting

The payments platform built for growth

From
$0.13/per-transaction
Rated
-
Full reviewWebsite
Affirm logo

Affirm

Personal Finance

Buy now pay later app offering short interest-free plans and longer plans that charge real APR interest

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Affirm has a free tier, so it costs nothing to try first.
  • Each has a real cost: Adyen there is a minimum monthly invoice, set by industry and business model and only disclosed through the sales team, so small volumes are not economic; Affirm longer instalment plans carry real interest, up to roughly 36 percent APR depending on the retailer, item and applicant, which is a genuine borrowing cost that the buy now pay later framing can obscure for shoppers who do not read the terms shown before accepting.
  • They diverge on capability: Adyen covers Payment processing, Affirm covers Pay in 4.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Adyen and Affirm actually diverge.

Attributes where Adyen and Affirm differ
AttributeAdyenAffirm
Starting price$0.13/per-transactionFree
Pricing modelusage-basedFree for short Pay in 4 plans; longer plans carry a disclosed APR up to roughly 36 percent, merchant pays a transaction fee
Free tierNoYes
PlatformsWeb, Api, PosiOS, Android, Web
CategoryAccountingPersonal Finance
Founded2006Unknown

Identical on both: user rating (Not yet rated).

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 Adyen

  • Payment processing
  • Risk management
  • Unified commerce
  • Issuing
  • Platform payments
  • SAP
  • Salesforce
  • Oracle

Only in Affirm

  • Pay in 4
  • Monthly instalment loans
  • Soft credit check
  • No late fees
  • Affirm Card
  • Pre-purchase terms disclosure

What people use each for

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

Adyen

  • Card acquiring with interchange plus pricing for larger merchantsnot Affirm
  • Accepting local payment methods across multiple countriesnot Affirm
  • Settling in several currencies through linked bank accountsnot Affirm
  • Unified online and in-person paymentsnot Affirm

Affirm

  • A shopper financing a large purchase such as furniture or electronics who wants disclosed APR terms compared directly against a credit card before committingnot Adyen
  • Someone using the short Pay in 4 plan for a smaller purchase who intends to pay it off within six weeks with no interestnot Adyen
  • A borrower who has missed a payment before and specifically wants a lender that does not charge late feesnot Adyen
  • A retailer offering point-of-sale financing to reduce cart abandonment on higher-ticket items, in exchange for paying Affirm a transaction feenot Adyen

Where each one falls short

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

Adyen

  • There is a minimum monthly invoice, set by industry and business model and only disclosed through the sales team, so small volumes are not economic
  • Published fees are indicative rather than a rate card, with real pricing negotiated
  • Interchange++ means the card cost varies per transaction rather than being a single predictable percentage
  • Alternative payment methods carry their own rates on top, such as 3.3 percent plus $0.10 for American Express in North America

Affirm

  • Longer instalment plans carry real interest, up to roughly 36 percent APR depending on the retailer, item and applicant, which is a genuine borrowing cost that the buy now pay later framing can obscure for shoppers who do not read the terms shown before accepting.
  • Even with no late fees, Affirm reports many loans to credit bureaus, so a missed or late payment on a longer plan can affect a credit score in a way the marketing around interest-free short plans does not prepare shoppers for.
  • Approval and APR both vary by individual loan, so the same shopper can be offered interest-free terms on one purchase and a high APR on another, making the cost unpredictable until checkout.
  • Merchants pay a transaction fee to offer Affirm at checkout, a cost typically built into retail pricing, so shoppers who pay by other means still indirectly subsidise the option even if they never use it.
  • The Affirm Card blurs the line between buy now pay later and a general-purpose credit card, and using it for everyday spending on interest-bearing terms can compound borrowing cost in a way a single point-of-sale purchase would not.

Pricing, plan by plan

Adyen

$0.13/per-transaction
  • Transaction-Based Pricing$undefined/mo
    • Fixed $0.13 USD per transaction
    • Variable fee determined by payment method
    • No setup fees

Affirm

Free
  • Pay in 4Free
    • No interest if paid on time over six weeks
    • No late fees for a missed payment
    • Soft credit check at application
  • Monthly instalmentsFree
    • APR disclosed before the loan is accepted, up to roughly 36 percent depending on retailer and applicant
    • Terms from three to 36 months depending on purchase amount
    • Payment history can be reported to credit bureaus

Which should you pick?

Choose Adyen if

  • You need payment processing.
  • You work on Web, Api, Pos.
  • You also want risk management.
Adyen review

Choose Affirm if

  • You need pay in 4.
  • You want to start without paying.
  • You work on iOS, Android, Web.
  • You also want monthly instalment loans.
Affirm review

Questions people ask

Is Adyen or Affirm better?
Neither clearly leads. Adyen starts at $0.13/per-transaction and Affirm at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Adyen or Affirm?
Affirm has a free tier; the other does not. Paid plans start at $0.13/per-transaction for Adyen and Free for Affirm.
Does Adyen or Affirm run on more platforms?
Adyen runs on Web, Api, Pos. Affirm runs on iOS, Android, Web.
Can I use Affirm for free?
Yes. Affirm has a free tier, so you can try it without paying. Adyen starts at $0.13/per-transaction.
What is Adyen best used for?
Adyen is most often used for card acquiring with interchange plus pricing for larger merchants, accepting local payment methods across multiple countries, settling in several currencies through linked bank accounts, unified online and in-person payments. Of those, card acquiring with interchange plus pricing for larger merchants and accepting local payment methods across multiple countries are not what Affirm is typically brought in for.
What can Adyen do that Affirm cannot?
Adyen covers Payment processing, Risk management, Unified commerce, Issuing. Affirm covers Pay in 4, Monthly instalment loans, Soft credit check, No late fees.

Answered from the vendors’ own pages

Adyen: How much does Adyen charge per transaction?

Adyen charges a fixed $0.13 USD per transaction plus a variable fee based on the payment method used. Credit cards typically cost $0.13 + 0.60% + interchange, while digital wallets and BNPL options cost between $0.13 + 0.99% to $0.13 + 4.99%+, depending on the specific method and region.

Source
Affirm: Does Affirm always charge interest?

No, short Pay in 4 plans over six weeks are typically interest-free if paid on time; longer instalment plans of three to 36 months can carry a disclosed APR up to roughly 36 percent.

Adyen: Does Adyen have monthly subscription or setup fees?

No, Adyen has no setup fees or monthly recurring charges. You pay only for each transaction processed. The transaction fee structure remains the same regardless of transaction volume or business size.

Source
Affirm: Does Affirm charge late fees?

No, Affirm does not charge late fees for a missed payment, unlike some buy now pay later competitors, but missed payments can still be reported to credit bureaus.

Adyen: What's Adyen's Interchange++ pricing option?

Adyen offers an Interchange++ transparent pricing model that passes interchange and scheme fees directly to merchants instead of bundling them into a percentage rate. This allows visibility into exact costs for each payment method.

Source
Affirm: Will using Affirm affect my credit score?

The initial application uses a soft credit check that does not affect your score, but Affirm reports many resulting loans to credit bureaus, so payment history on the loan itself can affect your score.

Adyen: Can I process payments in multiple currencies with Adyen?

Yes, Adyen supports 100+ payment methods across multiple currencies. You can link multiple bank accounts in different currencies to avoid currency conversion fees on international transactions.

Source
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