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APIs · head to head

Swagger vs Temenos Transact

Swagger logo

Swagger

APIs

API design and documentation platform for building, testing, and managing APIs

From
Free
Rated
-
Full reviewWebsite
Temenos Transact logo

Temenos Transact

APIs

Established core banking system used by banks in over a hundred countries

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Swagger has a free tier, so it costs nothing to try first.
  • Each has a real cost: Swagger specific pricing details not published on main website; requires accessing pricing page or contacting sales; Temenos Transact the codebase originates in the 1990s, so banks on older releases face major upgrade programmes to reach current versions, and many defer them for years.
  • They diverge on capability: Swagger covers API Specification, Temenos Transact covers Country model banks.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Swagger and Temenos Transact actually diverge.

Attributes where Swagger and Temenos Transact differ
AttributeSwaggerTemenos Transact
Starting priceFreeOn request
Pricing modelfreemiumquote
Free tierYesNo
PlatformsWeb, CLI, DesktopWeb, Linux, Windows, REST API
Founded2011Unknown

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 Swagger

  • API Specification
  • Interactive Documentation
  • Code Generation
  • GitHub
  • GitLab
  • Azure DevOps
  • Jira
  • Web support

Only in Temenos Transact

  • Country model banks
  • Multi-product core
  • Payments processing
  • API layer
  • Cloud deployment
  • Accounting engine

What people use each for

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

Swagger

  • API Developmentnot Temenos Transact
  • API Gatewaynot Temenos Transact
  • API Testingnot Temenos Transact
  • API Documentationnot Temenos Transact
  • Microservicesnot Temenos Transact

Temenos Transact

  • A bank in an emerging market needing local regulatory compliance without building it from scratchnot Swagger
  • An institution running Islamic banking products alongside conventional ones on one corenot Swagger
  • A bank that needs a large pool of experienced implementation consultants to de-risk a migrationnot Swagger
  • A group standardising subsidiaries in several countries onto one core banking systemnot Swagger

Where each one falls short

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

Swagger

  • Specific pricing details not published on main website; requires accessing pricing page or contacting sales

Temenos Transact

  • The codebase originates in the 1990s, so banks on older releases face major upgrade programmes to reach current versions, and many defer them for years.
  • Total cost is dominated by implementation partner fees rather than licence, and those programmes routinely overrun their original estimates.
  • Product changes that cloud-native cores treat as configuration can require development work and a release cycle, which slows time to market for new products.
  • Heavy customisation is common and it makes every subsequent upgrade harder, creating a compounding cost that banks feel a decade after go-live.
  • Temenos has repeatedly restructured its product line and naming, so buyers must check carefully which components a proposal actually includes and which are separately licensed.

Pricing, plan by plan

Swagger

Free
  • FreeFree
    • OpenAPI specification
    • Swagger UI
    • API documentation
  • Professional$20/monthly
    • Advanced features
    • Team collaboration
    • API testing
  • Enterprise$undefined/monthly
    • Custom deployment
    • Advanced security
    • Dedicated support

Temenos Transact

On request
  • Temenos Transact$undefined/year
    • Perpetual or subscription licence scaled by assets, accounts or users
    • Annual maintenance typically a percentage of licence value
    • Implementation delivered by partners and charged separately

Which should you pick?

Choose Swagger if

  • You need api specification.
  • You want to start without paying.
  • You work on Web, CLI, Desktop.
  • You also want interactive documentation.
Swagger review

Choose Temenos Transact if

  • You need country model banks.
  • You work on Web, Linux, Windows, REST API.
  • You also want multi-product core.
Temenos Transact review

Questions people ask

Is Swagger or Temenos Transact better?
Neither clearly leads. Swagger starts at Free and Temenos Transact at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Swagger or Temenos Transact?
Swagger has a free tier; the other does not. Paid plans start at Free for Swagger and On request for Temenos Transact.
Does Swagger or Temenos Transact run on more platforms?
Swagger runs on Web, CLI, Desktop. Temenos Transact runs on Web, Linux, Windows, REST API.
Can I use Swagger for free?
Yes. Swagger has a free tier, so you can try it without paying. Temenos Transact starts at On request.
What is Swagger best used for?
Swagger is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what Temenos Transact is typically brought in for.
What can Swagger do that Temenos Transact cannot?
Swagger covers API Specification, Interactive Documentation, Code Generation, GitHub. Temenos Transact covers Country model banks, Multi-product core, Payments processing, API layer.

Answered from the vendors’ own pages

Swagger: How much does Swagger cost?

Swagger does not publish specific pricing details on its main website. A free tier is available with a Start Free Trial option. For detailed pricing information, users must visit the dedicated pricing page or contact Swagger sales directly.

Source
Temenos Transact: Is Transact the same as T24?

Yes. T24 was renamed Temenos Transact; older installations and much of the consultant population still use the T24 name.

Swagger: Does Swagger offer a free plan?

Yes, Swagger offers a free tier described as simple, useful, and easy to master for API client functionality. Exact feature details and limitations are not specified on the homepage.

Source
Temenos Transact: Can it run in the cloud?

Yes, it is offered on public cloud, though many existing installations remain on-premises and moving them is a project.

Temenos Transact: What drives the cost?

Licence scaled by size, annual maintenance as a percentage of licence, and implementation partner fees that usually exceed the software cost.

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