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Technology · head to head

Finxact vs Tuum

Finxact logo

Finxact

Technology

Cloud native core banking, sold as Finxact from Fiserv since the 2022 acquisition

From
On request
Rated
-
Full reviewWebsite
Tuum logo

Tuum

APIs

Modular core banking platform from Estonia, formerly branded Modularbank

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Finxact fiserv sells several core platforms, so a buyer should demand written investment and support commitments for Finxact specifically rather than trusting that the surviving brand implies a protected roadmap.; Tuum it is a smaller, younger company than Mambu, so it has fewer live reference deployments and a shorter track record to evaluate risk against.
  • They diverge on capability: Finxact covers Cloud native core, Tuum covers Modular product structure.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Finxact and Tuum actually diverge.

Attributes where Finxact and Tuum differ
AttributeFinxactTuum
PlatformsWeb, API, CloudWeb, API
CategoryTechnologyAPIs

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 Finxact

  • Cloud native core
  • Real time posting
  • Configurable product definitions
  • Fiserv ecosystem access
  • Embedded banking support
  • Open API model
  • Multi tenant deployment
  • Regulatory reporting hooks

Only in Tuum

  • Modular product structure
  • Low-code integration middleware
  • Cloud-agnostic deployment
  • Multi-currency real-time accounts
  • Cards and lending modules
  • Faster migration timeline

What people use each for

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

Finxact

  • A United States regional bank replacing a legacy core but unwilling to take supplier viability risk on an independent challengernot Tuum
  • A community bank launching an embedded banking or sponsor bank programme on modern railsnot Tuum
  • An institution already running Fiserv card and payment services that wants the core on the same vendor relationshipnot Tuum
  • A bank standing up a new digital brand on a clean core while leaving the existing back book in placenot Tuum

Tuum

  • A bank wanting to migrate specific banking products to the cloud within months rather than replacing its entire core at oncenot Finxact
  • A fintech in the DACH region or Middle East wanting a European core banking vendor with regional expansion focusnot Finxact
  • An institution wanting low-code middleware to connect new modules to an existing legacy core rather than a full rebuildnot Finxact
  • A company researching "Modularbank" that needs to confirm it is the same company now branded Tuumnot Finxact

Where each one falls short

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

Finxact

  • Fiserv sells several core platforms, so a buyer should demand written investment and support commitments for Finxact specifically rather than trusting that the surviving brand implies a protected roadmap.
  • Core migration is a multi year programme where the licence is a small share of total cost against integration, data migration and parallel running.
  • Buying the core from Fiserv strengthens a relationship that already covers cards and payments, which weakens your negotiating position across the whole estate at renewal.
  • It is a United States product with United States regulatory and product assumptions, so international banks get little from it.
  • Being part of a very large vendor changes the service experience: the responsiveness that made Finxact attractive as a startup is not guaranteed inside a company of Fiserv's scale.

Tuum

  • It is a smaller, younger company than Mambu, so it has fewer live reference deployments and a shorter track record to evaluate risk against.
  • The 2022-era rebrand from Modularbank to Tuum means older funding records, case studies and press coverage appear under a different name, complicating due diligence for anyone unaware of the change.
  • Pricing is entirely unpublished, requiring a sales conversation to budget against competing composable core vendors.
  • Its geographic expansion into DACH and the Middle East is comparatively recent, so support depth and local regulatory expertise in those markets are less proven than in its home Baltic and Nordic base.
  • As with any core banking platform, choosing Tuum is a multi-year infrastructure commitment; switching cores after implementation is a major undertaking regardless of how modular the initial adoption was.

Pricing, plan by plan

Finxact

On request
  • Finxact from Fiserv$undefined/year
    • Quoted per institution, commonly on accounts or asset size
    • Implementation and integration costs typically exceed the licence fee
    • Bundled commercially with other Fiserv services in many deals

Tuum

On request
  • Tuum$undefined/year
    • Subscription and module-based pricing, not published
    • Custom quote required via sales

Which should you pick?

Choose Finxact if

  • You need cloud native core.
  • You work on Web, API, Cloud.
  • You also want real time posting.
Finxact review

Choose Tuum if

  • You need modular product structure.
  • You work on Web, API.
  • You also want low-code integration middleware.
Tuum review

Questions people ask

Is Finxact or Tuum better?
Neither clearly leads. Finxact starts at On request and Tuum at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Finxact or Tuum?
Finxact starts at On request and Tuum at On request.
Does Finxact or Tuum run on more platforms?
Finxact runs on Web, API, Cloud. Tuum runs on Web, API.
What is Finxact best used for?
Finxact is most often used for a united states regional bank replacing a legacy core but unwilling to take supplier viability risk on an independent challenger, a community bank launching an embedded banking or sponsor bank programme on modern rails, an institution already running fiserv card and payment services that wants the core on the same vendor relationship, a bank standing up a new digital brand on a clean core while leaving the existing back book in place. Of those, a united states regional bank replacing a legacy core but unwilling to take supplier viability risk on an independent challenger and a community bank launching an embedded banking or sponsor bank programme on modern rails are not what Tuum is typically brought in for.
What can Finxact do that Tuum cannot?
Finxact covers Cloud native core, Real time posting, Configurable product definitions, Fiserv ecosystem access. Tuum covers Modular product structure, Low-code integration middleware, Cloud-agnostic deployment, Multi-currency real-time accounts.

Answered from the vendors’ own pages

Finxact: Is Finxact still sold under its own name?

Yes. Fiserv acquired it in 2022 and continues to market it as Finxact from Fiserv, winning named core deals with it.

Tuum: Is Tuum the same company as Modularbank?

Yes, Modularbank rebranded to Tuum; it is the same company and platform.

Finxact: Is it genuinely cloud native?

Yes, API first with real time posting on public cloud, rather than a hosted version of a legacy core.

Tuum: Where is it strongest geographically?

Its base is Estonia and the Nordic and Baltic region, with newer expansion into DACH and the Middle East.

Finxact: How long is a migration?

Plan in years. Even a focused deployment is a multi year programme once integration and data migration are counted.

Tuum: Is pricing published?

No, subscription and module pricing require a sales conversation.

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