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APIs · head to head

Ozone API vs Stainless

Ozone API logo

Ozone API

APIs

Standards-compliant open banking API layer for banks and regulators

From
On request
Rated
-
Full reviewWebsite
Stainless logo

Stainless

APIs

Generates client SDKs, API docs, and MCP servers from an OpenAPI spec

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Stainless has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; Stainless starter and Pro plan prices are not published and require contacting the company.
  • They diverge on capability: Ozone API covers Multi-standard support, Stainless covers SDK generation.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

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

Attributes where Ozone API and Stainless differ
AttributeOzone APIStainless
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
PlatformsWeb, REST API, Linuxweb, api

Identical on both: 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 Ozone API

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

Only in Stainless

  • SDK generation
  • MCP server generation
  • Docs site generation
  • Webhooks and streaming support
  • Automated unit tests
  • Git integration

What people use each for

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

Ozone API

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

Stainless

  • Generating typed SDKs for a public APInot Ozone API
  • Producing an MCP server from an existing OpenAPI specnot Ozone API
  • Building an API documentation site alongside client librariesnot Ozone API
  • Giving open-source APIs a free SDK generation pathnot Ozone API

Where each one falls short

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

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.

Stainless

  • Starter and Pro plan prices are not published and require contacting the company.
  • The free plan caps APIs at 25 endpoints, which excludes larger production APIs.
  • Overage charges apply per SDK/endpoint/month once limits are exceeded, which can make costs unpredictable at scale.

Pricing, plan by plan

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

Stainless

Free
  • FreeFree
    • Up to 5 generators (SDKs, docs, or MCP servers)
    • 5 seats
    • APIs with 25 or fewer endpoints
  • Starter$undefined/mo
    • Unlimited generators
    • Expanded seats
    • Private SDKs of any size
  • Pro$undefined/mo
    • Custom enterprise features and pricing
  • Enterprise$undefined/mo
    • Dedicated support
    • SOC 2 compliance reports
    • Purchase order/invoicing with negotiable terms

Which should you pick?

Choose Ozone API if

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

Choose Stainless if

  • You need sdk generation.
  • You want to start without paying.
  • You work on web, api.
  • You also want mcp server generation.
Stainless review

Questions people ask

Is Ozone API or Stainless better?
Neither clearly leads. Ozone API starts at On request and Stainless at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Ozone API or Stainless?
Stainless has a free tier; the other does not. Paid plans start at On request for Ozone API and Free for Stainless.
Does Ozone API or Stainless run on more platforms?
Ozone API runs on Web, REST API, Linux. Stainless runs on web, api.
Can I use Stainless for free?
Yes. Stainless has a free tier, so you can try it without paying. Ozone API starts at On request.
What is Ozone API best used for?
Ozone API is most often used for a building society facing an open banking compliance deadline with no api team of its own, a bank operating in several jurisdictions that must satisfy different open banking standards at once, a regulator or standards body building national open finance infrastructure, a bank wanting to sell premium apis beyond the regulatory minimum without building entitlement plumbing. Of those, a building society facing an open banking compliance deadline with no api team of its own and a bank operating in several jurisdictions that must satisfy different open banking standards at once are not what Stainless is typically brought in for.
What can Ozone API do that Stainless cannot?
Ozone API covers Multi-standard support, Consent management, Developer portal, Regulatory reporting. Stainless covers SDK generation, MCP server generation, Docs site generation, Webhooks and streaming support.

Answered from the vendors’ own pages

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.

Stainless: Is there a free plan, and what are its limits?

Yes. The Free plan supports up to 5 generators, 5 seats, APIs with 25 or fewer endpoints, and 100 preview builds per month, with email support.

Source
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.

Stainless: Who owns the generated SDK code?

The generated SDK code is owned by the customer and published by Stainless under the Apache 2.0 license.

Source
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.

Stainless: What happens if I exceed my plan's endpoint limit?

Customers exceeding their endpoint limits are billed per SDK, per endpoint, per month for the overage.

Source
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