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APIs · head to head

Codat vs Ozone API

Codat logo

Codat

APIs

One API for small business accounting, banking and commerce data

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: Codat the accounting platforms are metering developer access themselves, with Xero introducing tiered connection based developer pricing from 2 March 2026, so a cost you do not control has been inserted between you and the data and it scales with the number of customers you connect.; 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: Codat covers Normalised accounting API, 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 Codat and Ozone API actually diverge.

Attributes where Codat and Ozone API differ
AttributeCodatOzone API
PlatformsAPI, WebWeb, 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 Codat

  • Normalised accounting API
  • Banking and commerce data
  • Lending products
  • Write-back
  • Business verification
  • Supplier onboarding
  • Connection management
  • Data quality handling

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.

Codat

  • A business lender that wants live ledger data for underwriting rather than a borrower emailing exported PDF accountsnot Ozone API
  • A commercial bank monitoring covenant compliance across a portfolio of small business borrowers continuously rather than quarterlynot Ozone API
  • A payment company verifying a merchant trading history before extending working capitalnot Ozone API
  • A B2B platform writing bills and payments back into a customer accounting system so reconciliation happens automaticallynot Ozone API

Ozone API

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

Where each one falls short

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

Codat

  • The accounting platforms are metering developer access themselves, with Xero introducing tiered connection based developer pricing from 2 March 2026, so a cost you do not control has been inserted between you and the data and it scales with the number of customers you connect.
  • Pricing is opaque and enterprise shaped for a product developers expect to evaluate technically first, so build decisions get made before anyone knows the unit economics.
  • Normalisation hides but does not remove the underlying differences between accounting systems, and edge cases in multi-currency, journals and tax handling surface as data quality problems that your team must reason about in each source system anyway.
  • Data quality depends on the small business keeping its books properly, so a lender using ledger data for underwriting inherits the bookkeeping standard of its worst borrower and needs its own validation layer regardless.
  • Connection breakage from expired tokens and platform API changes is an ongoing operational load, and a borrower whose connection lapses stops being monitored silently, which is the failure mode that matters most in a lending portfolio.

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

Codat

On request
  • Codat Platform$undefined/year
    • Priced by connected companies, data types and products
    • Lending and verification products priced above core data access
    • Annual enterprise agreements

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 Codat if

  • You need normalised accounting api.
  • You work on API, Web.
  • You also want banking and commerce data.
Codat 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 Codat or Ozone API better?
Neither clearly leads. Codat 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, Codat or Ozone API?
Codat starts at On request and Ozone API at On request.
Does Codat or Ozone API run on more platforms?
Codat runs on API, Web. Ozone API runs on Web, REST API, Linux.
What is Codat best used for?
Codat is most often used for a business lender that wants live ledger data for underwriting rather than a borrower emailing exported pdf accounts, a commercial bank monitoring covenant compliance across a portfolio of small business borrowers continuously rather than quarterly, a payment company verifying a merchant trading history before extending working capital, a b2b platform writing bills and payments back into a customer accounting system so reconciliation happens automatically. Of those, a business lender that wants live ledger data for underwriting rather than a borrower emailing exported pdf accounts and a commercial bank monitoring covenant compliance across a portfolio of small business borrowers continuously rather than quarterly are not what Ozone API is typically brought in for.
What can Codat do that Ozone API cannot?
Codat covers Normalised accounting API, Banking and commerce data, Lending products, Write-back. Ozone API covers Multi-standard support, Consent management, Developer portal, Regulatory reporting.

Answered from the vendors’ own pages

Codat: What is changing with Xero in 2026?

Xero is introducing a tiered, usage based developer pricing model effective 2 March 2026, with tiers based on the number of customer connections an app holds. That is a new cost in the chain for anyone reading Xero data at scale, whether directly or through Codat.

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.

Codat: Can Codat write data back?

Yes. It supports pushing bills, payments and journal entries into accounting systems, not only reading from them.

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.

Codat: Is pricing published?

No. It is quoted by connected companies, data types and products, and users consistently describe it as opaque.

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.

Codat: Does it replace bank data aggregation?

Not entirely. It covers banking alongside accounting and commerce, but lenders commonly run it beside a bank aggregator for transaction level cash flow.

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