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APIs · head to head

Temenos Transact vs Zeta

Temenos Transact logo

Temenos Transact

APIs

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

From
On request
Rated
-
Full reviewWebsite
Zeta logo

Zeta

Technology

Cloud native credit card processing and core banking from Bhavin Turakhia's Zeta

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Zeta it competes against card processors with decades of production track record, and in card processing an outage is a public event, so a shorter operational history is a genuine risk factor rather than a technicality.
  • They diverge on capability: Temenos Transact covers Country model banks, Zeta covers Tachyon card processing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

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

Attributes where Temenos Transact and Zeta differ
AttributeTemenos TransactZeta
PlatformsWeb, Linux, Windows, REST APIWeb, API, Cloud, iOS, Android
CategoryAPIsTechnology

Identical on both: starting price (On request), pricing model (quote), free tier (No), user rating (Not yet rated).

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 Temenos Transact

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

Only in Zeta

  • Tachyon card processing
  • Real time authorisation
  • Rewards and offers engine
  • Core banking modules
  • Programme configuration
  • Mobile and web SDKs
  • Fraud and controls

Both cover

  • Cloud deployment

What people use each for

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

Temenos Transact

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

Zeta

  • A United States bank whose card platform makes launching a new rewards product a multi quarter vendor projectnot Temenos Transact
  • An issuer that wants authorisation level controls and real time data rather than end of day filesnot Temenos Transact
  • A large fintech launching a credit card programme at scale with custom product logicnot Temenos Transact
  • A bank consolidating card and deposit processing onto one modern platformnot Temenos Transact

Where each one falls short

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

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.

Zeta

  • It competes against card processors with decades of production track record, and in card processing an outage is a public event, so a shorter operational history is a genuine risk factor rather than a technicality.
  • Contracts are enterprise scale and quoted with volume minimums, which puts it out of reach of small issuers who would otherwise benefit most from modern tooling.
  • A card portfolio migration runs twelve to twenty four months at minimum, during which the issuer runs two platforms and pays for both.
  • Zeta is a processor rather than a licence holder, so network membership, BIN sponsorship and regulatory obligations remain entirely with the issuer.
  • Public references for large live United States production volumes are fewer than the announcements imply, so diligence should insist on active account counts and uptime history rather than partnership press releases.

Pricing, plan by plan

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

Zeta

On request
  • Tachyon platform$undefined/year
    • Quoted per institution, commonly on active accounts or transaction volume
    • Implementation for a card portfolio migration measured in quarters to years
    • Minimum volume commitments typical on enterprise contracts

Which should you pick?

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

Choose Zeta if

  • You need tachyon card processing.
  • You work on Web, API, Cloud, iOS, Android.
  • You also want real time authorisation.
Zeta review

Questions people ask

Is Temenos Transact or Zeta better?
Neither clearly leads. Temenos Transact starts at On request and Zeta at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Temenos Transact or Zeta?
Temenos Transact starts at On request and Zeta at On request.
Does Temenos Transact or Zeta run on more platforms?
Temenos Transact runs on Web, Linux, Windows, REST API. Zeta runs on Web, API, Cloud, iOS, Android.
What is Temenos Transact best used for?
Temenos Transact is most often used for a bank in an emerging market needing local regulatory compliance without building it from scratch, an institution running islamic banking products alongside conventional ones on one core, a bank that needs a large pool of experienced implementation consultants to de-risk a migration, a group standardising subsidiaries in several countries onto one core banking system. Of those, a bank in an emerging market needing local regulatory compliance without building it from scratch and an institution running islamic banking products alongside conventional ones on one core are not what Zeta is typically brought in for.
What can Temenos Transact do that Zeta cannot?
Temenos Transact covers Country model banks, Multi-product core, Payments processing, API layer. Zeta covers Tachyon card processing, Real time authorisation, Rewards and offers engine, Core banking modules. Both handle Cloud deployment.

Answered from the vendors’ own pages

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.

Zeta: Which Zeta is this?

The banking technology company founded by Bhavin Turakhia, which builds the Tachyon card processing and core banking platform. Not any similarly named payroll or accounting product.

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.

Zeta: What is its strongest use case?

United States credit card issuing and processing, where legacy platforms make product changes slow and expensive.

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.

Zeta: Does Zeta provide the BIN or licence?

No. It processes. Network membership, BIN sponsorship and regulatory obligations stay with the issuer.

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