Softwr

APIs · head to head

Aiia vs Highnote

Aiia logo

Aiia

APIs

Open banking and open finance API platform, now operating as Mastercard Open Banking

From
On request
Rated
-
Full reviewWebsite
Highnote logo

Highnote

APIs

Card issuing, acquiring and ledger on one platform for embedded payments

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Aiia it is now part of Mastercard rather than an independent company, so a business specifically wanting to avoid card network dependency in its banking infrastructure no longer gets that separation by choosing Aiia.; Highnote card issuing requires a sponsor bank, and that bank sets programme approval, compliance obligations and often minimum volumes, so a small programme can be rejected regardless of technical fit.
  • They diverge on capability: Aiia covers Bank account data access, Highnote covers Card issuing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Aiia and Highnote actually diverge.

Attributes where Aiia and Highnote differ
AttributeAiiaHighnote

Identical on both: starting price (On request), pricing model (quote), free tier (No), platforms (Web, API), user rating (Not yet rated), category (APIs).

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 Aiia

  • Bank account data access
  • Payment initiation
  • Mastercard Open Finance integration
  • Modern authentication support
  • Multi-country coverage
  • Developer documentation and sandbox

Only in Highnote

  • Card issuing
  • Merchant acquiring
  • Unified ledger
  • Spend controls
  • GraphQL API
  • Programme management
  • Dispute handling
  • Real time authorisation webhooks

What people use each for

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

Aiia

  • A lending or credit product needing affordability checks via European bank account datanot Highnote
  • A personal finance or accounting product needing transaction history across Nordic and European banksnot Highnote
  • A payments product wanting account-to-account payment initiation under open banking regulationnot Highnote
  • A business wanting the stability and continued investment of Mastercard ownership behind its banking connectivity providernot Highnote

Highnote

  • A marketplace that both pays out to sellers and issues them spend cards, wanting one settlement ledgernot Aiia
  • A vertical software company embedding card acceptance and card issuing for the same customer basenot Aiia
  • A fintech launching a commercial charge card programme with custom authorisation logicnot Aiia
  • A platform replacing separate issuing and acquiring vendors to remove cross system reconciliationnot Aiia

Where each one falls short

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

Aiia

  • It is now part of Mastercard rather than an independent company, so a business specifically wanting to avoid card network dependency in its banking infrastructure no longer gets that separation by choosing Aiia.
  • Pricing is not published and requires engaging Mastercard's open finance sales process, which can be a heavier sales motion than dealing with a smaller independent open banking provider.
  • Its strongest bank coverage remains concentrated in the Nordics and Northern Europe, so companies needing dense coverage in Southern or Eastern Europe should verify current bank connectivity before committing.
  • Brand confusion is real: developer documentation, login portals and older case studies still reference "Aiia" while newer Mastercard material refers to "Mastercard Open Banking," and a company researching either name in isolation may miss half the relevant material.
  • As with any open banking platform, reliability still depends on the consistency of the underlying banks' own APIs, which is a systemic industry issue rather than something Aiia specifically controls.

Highnote

  • Card issuing requires a sponsor bank, and that bank sets programme approval, compliance obligations and often minimum volumes, so a small programme can be rejected regardless of technical fit.
  • Pricing is entirely quoted, including platform fees, per active card charges and monthly minimums that do not appear on the website, so the true cost per card is only visible late in a sales process.
  • Interchange sharing is the real revenue model for most customers, and the split is negotiated, capped for regulated debit under the Durbin amendment and sensitive to your spend mix, so revenue projections built on headline interchange rates overstate income.
  • Running issuing and acquiring with one provider concentrates risk: an outage or a compliance action affects both money in and money out at the same time.
  • Highnote is a younger company than the established issuer processors, so long term programme continuity, network certifications in new geographies and international coverage are thinner than the incumbent alternatives.

Pricing, plan by plan

Aiia

On request
  • Aiia Enterprise (Mastercard Open Banking)$undefined/year
    • Pricing not published, quote via Mastercard Open Finance sales

Highnote

On request
  • Highnote platform$undefined/year
    • Quoted per programme with no public rate card
    • Requires a sponsor bank relationship for card issuing
    • Interchange sharing terms negotiated per programme

Which should you pick?

Choose Aiia if

  • You need bank account data access.
  • You work on Web, API.
  • You also want payment initiation.
Aiia review

Choose Highnote if

  • You need card issuing.
  • You work on Web, API.
  • You also want merchant acquiring.
Highnote review

Questions people ask

Is Aiia or Highnote better?
Neither clearly leads. Aiia starts at On request and Highnote at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Aiia or Highnote?
Aiia starts at On request and Highnote at On request.
Does Aiia or Highnote run on more platforms?
Both run on Web, API, so platform support will not decide this one for you.
What is Aiia best used for?
Aiia is most often used for a lending or credit product needing affordability checks via european bank account data, a personal finance or accounting product needing transaction history across nordic and european banks, a payments product wanting account-to-account payment initiation under open banking regulation, a business wanting the stability and continued investment of mastercard ownership behind its banking connectivity provider. Of those, a lending or credit product needing affordability checks via european bank account data and a personal finance or accounting product needing transaction history across nordic and european banks are not what Highnote is typically brought in for.
What can Aiia do that Highnote cannot?
Aiia covers Bank account data access, Payment initiation, Mastercard Open Finance integration, Modern authentication support. Highnote covers Card issuing, Merchant acquiring, Unified ledger, Spend controls.

Answered from the vendors’ own pages

Aiia: Is Aiia still an independent company?

No, it was acquired by Mastercard in 2021 and now operates as part of Mastercard Open Finance Solutions, referenced as Aiia Enterprise.

Highnote: Do I need a sponsor bank?

Yes for card issuing in the United States. Highnote is a processor and programme platform, not a bank, and the sponsor bank sets approval and compliance terms.

Aiia: Does the Aiia brand still exist?

Yes, in developer documentation and login portals, but the company behind it is Mastercard.

Highnote: How do customers make money on a card programme?

Mostly interchange sharing. Negotiate the split explicitly and model it against your actual spend mix, since regulated debit interchange is capped.

Aiia: Which banks does it cover?

Around 3,000 European banks, with strongest coverage in the Nordics and Northern Europe.

Highnote: Can Highnote handle both accepting and issuing payments?

Yes since its 2025 acquiring launch, on the same ledger, which is its main structural differentiator.

Share

Related pages

More on Aiia

More on Highnote

Keep looking

Other head to heads