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APIs · head to head

Highnote vs Ozone API

Highnote logo

Highnote

APIs

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

From
On request
Rated
-
Full reviewWebsite
Ozone API logo

Ozone API

APIs

Standards-compliant open banking API layer for banks and regulators

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Ozone API it provides the API layer, not the core connectivity, so the bulk of the project is still integrating your own core banking systems and that cost is not in the licence.
  • They diverge on capability: Highnote covers Card issuing, Ozone API covers Multi-standard support.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Highnote and Ozone API actually diverge.

Attributes where Highnote and Ozone API differ
AttributeHighnoteOzone API
PlatformsWeb, APIWeb, REST API, Linux

Identical on both: starting price (On request), pricing model (quote), free tier (No), 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 Highnote

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

Only in Ozone API

  • Multi-standard support
  • Consent management
  • Developer portal
  • Regulatory reporting
  • Premium API monetisation
  • Deployment flexibility

What people use each for

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

Highnote

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

Ozone API

  • A building society facing an open banking compliance deadline with no API team of its ownnot Highnote
  • A bank operating in several jurisdictions that must satisfy different open banking standards at oncenot Highnote
  • A regulator or standards body building national open finance infrastructurenot Highnote
  • A bank wanting to sell premium APIs beyond the regulatory minimum without building entitlement plumbingnot Highnote

Where each one falls short

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

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.

Ozone API

  • It provides the API layer, not the core connectivity, so the bulk of the project is still integrating your own core banking systems and that cost is not in the licence.
  • Value is driven by regulatory obligation, so an institution not under a mandate struggles to build a business case for the spend.
  • It is a small UK vendor selling to large regulated institutions, which raises procurement and vendor viability questions during bank due diligence.
  • Premium API monetisation is a genuine capability but few banks have found real demand, so revenue projections used to justify the purchase often do not materialise.
  • Standards evolve continuously and each revision means a change programme in your own systems, even where Ozone absorbs the specification work at the API edge.

Pricing, plan by plan

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

Ozone API

On request
  • Ozone API$undefined/year
    • Annual licence or managed service subscription, quoted
    • Scaling by institution size, standards in scope and API call volume
    • Implementation and core integration charged separately

Which should you pick?

Choose Highnote if

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

Choose Ozone API if

  • You need multi-standard support.
  • You work on Web, REST API, Linux.
  • You also want consent management.
Ozone API review

Questions people ask

Is Highnote or Ozone API better?
Neither clearly leads. Highnote starts at On request and Ozone API at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Highnote or Ozone API?
Highnote starts at On request and Ozone API at On request.
Does Highnote or Ozone API run on more platforms?
Highnote runs on Web, API. Ozone API runs on Web, REST API, Linux.
What is Highnote best used for?
Highnote is most often used for a marketplace that both pays out to sellers and issues them spend cards, wanting one settlement ledger, a vertical software company embedding card acceptance and card issuing for the same customer base, a fintech launching a commercial charge card programme with custom authorisation logic, a platform replacing separate issuing and acquiring vendors to remove cross system reconciliation. Of those, a marketplace that both pays out to sellers and issues them spend cards, wanting one settlement ledger and a vertical software company embedding card acceptance and card issuing for the same customer base are not what Ozone API is typically brought in for.
What can Highnote do that Ozone API cannot?
Highnote covers Card issuing, Merchant acquiring, Unified ledger, Spend controls. Ozone API covers Multi-standard support, Consent management, Developer portal, Regulatory reporting.

Answered from the vendors’ own pages

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.

Ozone API: Is this a competitor to Plaid or TrueLayer?

No, the opposite side. Ozone is bought by the bank exposing data; Plaid and TrueLayer consume it on behalf of third parties.

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.

Ozone API: Does it connect to my core banking system?

It provides the standards-compliant API surface and adapters, but connecting your core is an integration project you scope separately.

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.

Ozone API: Which standards does it support?

UK Open Banking, Berlin Group, FDX, Consumer Data Right and Gulf regional standards, among others, from one platform.

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