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APIs · head to head

Ozone API vs Thunder Client

Ozone API logo

Ozone API

APIs

Standards-compliant open banking API layer for banks and regulators

From
On request
Rated
-
Full reviewWebsite
Thunder Client logo

Thunder Client

APIs

Lightweight REST API client built as VSCode extension

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Thunder Client 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.; Thunder Client paid plans are billed annually only: Starter is $3 per user per month and capped at a maximum of 10 seats, Business is $7 per user per month with 500 monthly collection runs per user, and Enterprise is $16 per user per month for unlimited runs
  • They diverge on capability: Ozone API covers Multi-standard support, Thunder Client covers REST Client.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Ozone API and Thunder Client actually diverge.

Attributes where Ozone API and Thunder Client differ
AttributeOzone APIThunder Client
Starting priceOn requestFree
Pricing modelquotefreemium
Free tierNoYes
PlatformsWeb, REST API, LinuxVSCode extension, Web
FoundedUnknown2021

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 Thunder Client

  • REST Client
  • Environment variables
  • Response testing
  • VSCode
  • GitHub
  • Webhook support
  • VSCode extension support
  • Web support

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 Thunder Client
  • A bank operating in several jurisdictions that must satisfy different open banking standards at oncenot Thunder Client
  • A regulator or standards body building national open finance infrastructurenot Thunder Client
  • A bank wanting to sell premium APIs beyond the regulatory minimum without building entitlement plumbingnot Thunder Client

Thunder Client

  • API Developmentnot Ozone API
  • API Gatewaynot Ozone API
  • API Testingnot Ozone API
  • API Documentationnot Ozone API
  • Microservicesnot 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.

Thunder Client

  • Paid plans are billed annually only: Starter is $3 per user per month and capped at a maximum of 10 seats, Business is $7 per user per month with 500 monthly collection runs per user, and Enterprise is $16 per user per month for unlimited runs

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

Thunder Client

Free
  • FreeFree
    • REST client
    • Collection management
    • Local testing
  • Pro$8/monthly
    • Cloud sync
    • Team collaboration
    • Advanced features

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 Thunder Client if

  • You need rest client.
  • You want to start without paying.
  • You work on VSCode extension, Web.
  • You also want environment variables.
Thunder Client review

Questions people ask

Is Ozone API or Thunder Client better?
Neither clearly leads. Ozone API starts at On request and Thunder Client at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Ozone API or Thunder Client?
Thunder Client has a free tier; the other does not. Paid plans start at On request for Ozone API and Free for Thunder Client.
Does Ozone API or Thunder Client run on more platforms?
Ozone API runs on Web, REST API, Linux. Thunder Client runs on VSCode extension, Web.
Can I use Thunder Client for free?
Yes. Thunder Client 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 Thunder Client is typically brought in for.
What can Ozone API do that Thunder Client cannot?
Ozone API covers Multi-standard support, Consent management, Developer portal, Regulatory reporting. Thunder Client covers REST Client, Environment variables, Response testing, VSCode.

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.

Thunder Client: How much does Thunder Client cost?

Thunder Client publishes a free plan at no cost, then Starter at $3, Business at $7 and Enterprise at $16, all priced annually.

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.

Thunder Client: Is Thunder Client free?

Yes, there is a free plan. It is used through the Thunder Client extension for VS Code, available from the marketplace, with limits applied compared with the paid tiers.

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.

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