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APIs · head to head

curl vs Ozone API

curl logo

curl

APIs

Command-line tool for transferring data using URLs with wide protocol support

From
Free
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

  • Only curl has a free tier, so it costs nothing to try first.
  • Each has a real cost: curl open-source with no vendor pricing: curl is free and open-source under GPL 3.0; no subscription or licensing costs apply; 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: curl covers HTTP/HTTPS, 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 curl and Ozone API actually diverge.

Attributes where curl and Ozone API differ
AttributecurlOzone API
Starting priceFreeOn request
Pricing modelopen-sourcequote
Free tierYesNo
PlatformsLinux, MacOS, Windows, Unix, MobileWeb, REST API, Linux
Founded1997Unknown

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 curl

  • HTTP/HTTPS
  • FTP
  • Multiple protocols
  • Universal compatibility
  • Scripting tools
  • Linux support
  • MacOS support
  • Windows support

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.

curl

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

Ozone API

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

Where each one falls short

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

curl

  • Open-source with no vendor pricing: curl is free and open-source under GPL 3.0; no subscription or licensing costs apply
  • Commercial support costs hidden: site references 'commercial support available' but pricing is not detailed or accessible from homepage
  • No SaaS model: curl is a command-line tool and library; costs are limited to optional commercial support contracts (pricing unknown)
  • Self-support burden: free software means customers rely on community forums or undisclosed commercial support pricing

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

curl

Free
  • Open SourceFree
    • Full curl functionality
    • Community support

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 curl if

  • You need http/https.
  • You want to start without paying.
  • You work on Linux, MacOS, Windows, Unix, Mobile.
  • You also want ftp.
curl 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 curl or Ozone API better?
Neither clearly leads. curl starts at Free and Ozone API at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, curl or Ozone API?
curl has a free tier; the other does not. Paid plans start at Free for curl and On request for Ozone API.
Does curl or Ozone API run on more platforms?
curl runs on Linux, MacOS, Windows, Unix, Mobile. Ozone API runs on Web, REST API, Linux.
Can I use curl for free?
Yes. curl has a free tier, so you can try it without paying. Ozone API starts at On request.
What is curl best used for?
curl is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what Ozone API is typically brought in for.
What can curl do that Ozone API cannot?
curl covers HTTP/HTTPS, FTP, Multiple protocols, Universal compatibility. Ozone API covers Multi-standard support, Consent management, Developer portal, Regulatory reporting.

Answered from the vendors’ own pages

curl: How much does curl cost?

curl is free and open-source software under the GPL 3.0 license. There is no cost to download, use, or modify the software.

Source
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.

curl: Is commercial support available for curl?

Yes. The curl website references 'commercial support available,' but pricing and details are not disclosed on the homepage and require visiting the support page.

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.

curl: Can I sponsor curl financially?

Yes. The curl website offers an option to 'Sponsor curl financially.' Visitors can donate to support curl development, but the donation link must be accessed through the site's support section.

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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