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APIs · head to head

Solaris vs Temenos Transact

Solaris logo

Solaris

APIs

German banking as a service with a full banking licence and a live regulatory problem

From
On request
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

  • Each has a real cost: Solaris baFin appointed a special representative in 2022 and extended the mandate in July 2024, so a partner is joining a bank under active supervisory monitoring, with slower approvals and heavier compliance demands as a direct consequence.; 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: Solaris covers German banking licence, 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 Solaris and Temenos Transact actually diverge.

Attributes where Solaris and Temenos Transact differ
AttributeSolarisTemenos Transact
PlatformsWeb, APIWeb, Linux, Windows, REST API

Identical on both: starting price (On request), pricing model (quote), free tier (No), 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 Solaris

  • German banking licence
  • IBAN accounts
  • Card issuing
  • Lending as a service
  • Digital assets and custody
  • SEPA payments
  • KYC and onboarding
  • Deposit protection

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.

Solaris

  • A retailer or platform launching a German current account or card product without applying for its own licencenot Temenos Transact
  • A fintech that needs deposit taking and lending, which an e-money licence cannot providenot Temenos Transact
  • A European business needing German IBANs because customers reject foreign IBANs for salary and direct debitnot Temenos Transact
  • A company requiring German statutory deposit protection on customer balances as a product claimnot Temenos Transact

Temenos Transact

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

Where each one falls short

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

Solaris

  • BaFin appointed a special representative in 2022 and extended the mandate in July 2024, so a partner is joining a bank under active supervisory monitoring, with slower approvals and heavier compliance demands as a direct consequence.
  • BaFin fined Solaris EUR 6.5 million in March 2024 for systematically late suspicious activity reports and EUR 500,000 for breaching large exposure limits between January 2022 and March 2024, which is a track record a partner inherits reputationally.
  • Solaris has previously needed BaFin approval before onboarding new corporate clients, which can turn a commercial decision to launch into a regulatory timetable outside your control.
  • The 2024 restructuring involved job cuts and the closure of parts of a business unit, so product lines a partner depends on may not have the engineering behind them that the sales process implies.
  • SBI Holdings acquired majority control in 2025, so strategic direction now sits with a Japanese financial group whose priorities for the European business may differ from the roadmap you were sold.

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

Solaris

On request
  • Solaris banking as a service$undefined/year
    • Quoted per partner, typically setup fee plus monthly platform fee
    • Per account, per card and per transaction charges on top
    • Interchange sharing arrangements negotiated per programme

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 Solaris if

  • You need german banking licence.
  • You work on Web, API.
  • You also want iban accounts.
Solaris 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 Solaris or Temenos Transact better?
Neither clearly leads. Solaris starts at On request and Temenos Transact at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Solaris or Temenos Transact?
Solaris starts at On request and Temenos Transact at On request.
Does Solaris or Temenos Transact run on more platforms?
Solaris runs on Web, API. Temenos Transact runs on Web, Linux, Windows, REST API.
What is Solaris best used for?
Solaris is most often used for a retailer or platform launching a german current account or card product without applying for its own licence, a fintech that needs deposit taking and lending, which an e-money licence cannot provide, a european business needing german ibans because customers reject foreign ibans for salary and direct debit, a company requiring german statutory deposit protection on customer balances as a product claim. Of those, a retailer or platform launching a german current account or card product without applying for its own licence and a fintech that needs deposit taking and lending, which an e-money licence cannot provide are not what Temenos Transact is typically brought in for.
What can Solaris do that Temenos Transact cannot?
Solaris covers German banking licence, IBAN accounts, Card issuing, Lending as a service. Temenos Transact covers Country model banks, Multi-product core, Payments processing, API layer.

Answered from the vendors’ own pages

Solaris: Does Solaris have a real banking licence?

Yes. Solaris SE is a German credit institution, which is why it can offer deposits and lending, unlike e-money based competitors.

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.

Solaris: Is the BaFin action still live?

The special representative appointed in 2022 had the mandate extended in July 2024, and fines were issued in March 2024. Treat supervisory oversight as an active condition in your diligence.

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.

Solaris: Who owns Solaris now?

SBI Holdings of Japan agreed in December 2024 and January 2025 to take a majority stake of over seventy per cent for around EUR 100 million.

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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