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Databases · head to head

Apache Solr vs Temenos Transact

Apache Solr logo

Apache Solr

Databases

Enterprise search platform built on Apache Lucene

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 Apache Solr has a free tier, so it costs nothing to try first.
  • Each has a real cost: Apache Solr xML-heavy configuration and a developer experience that feels dated beside newer engines; 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: Apache Solr covers Lucene-based indexing, 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 Apache Solr and Temenos Transact actually diverge.

Attributes where Apache Solr and Temenos Transact differ
AttributeApache SolrTemenos Transact
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsLinux, Docker, Kubernetes, Self-hostedWeb, Linux, Windows, REST API
CategoryDatabasesAPIs

Identical on both: 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 Apache Solr

  • Lucene-based indexing
  • Faceted search
  • SolrCloud
  • Schema control

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.

Apache Solr

  • Library, archive and catalogue search where faceting is centralnot Temenos Transact
  • Long-lived enterprise deployments valuing stability over noveltynot Temenos Transact
  • Search requiring precise, explicitly configured relevance tuningnot Temenos Transact

Temenos Transact

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

Where each one falls short

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

Apache Solr

  • XML-heavy configuration and a developer experience that feels dated beside newer engines
  • SolrCloud depends on ZooKeeper, adding a component Elasticsearch removed years ago
  • Smaller mindshare now, so newer tutorials, hiring and integrations favour Elasticsearch
  • Considerably heavier than a purpose-built application search engine

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

Apache Solr

Free
  • Apache SolrFree
    • Full functionality
    • No usage limits
    • Community 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 Apache Solr if

  • You need lucene-based indexing.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Self-hosted.
  • You also want faceted search.
Apache Solr 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 Apache Solr or Temenos Transact better?
Neither clearly leads. Apache Solr 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, Apache Solr or Temenos Transact?
Apache Solr has a free tier; the other does not. Paid plans start at Free for Apache Solr and On request for Temenos Transact.
Does Apache Solr or Temenos Transact run on more platforms?
Apache Solr runs on Linux, Docker, Kubernetes, Self-hosted. Temenos Transact runs on Web, Linux, Windows, REST API.
Can I use Apache Solr for free?
Yes. Apache Solr has a free tier, so you can try it without paying. Temenos Transact starts at On request.
What is Apache Solr best used for?
Apache Solr is most often used for library, archive and catalogue search where faceting is central, long-lived enterprise deployments valuing stability over novelty, search requiring precise, explicitly configured relevance tuning. Of those, library, archive and catalogue search where faceting is central and long-lived enterprise deployments valuing stability over novelty are not what Temenos Transact is typically brought in for.
What can Apache Solr do that Temenos Transact cannot?
Apache Solr covers Lucene-based indexing, Faceted search, SolrCloud, Schema control. Temenos Transact covers Country model banks, Multi-product core, Payments processing, API layer.

Answered from the vendors’ own pages

Apache Solr: Is Apache Solr free?

Yes, open source under the Apache Software Foundation.

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.

Apache Solr: Solr or Elasticsearch?

Both are built on Lucene. Elasticsearch has the larger ecosystem and a friendlier API; Solr is very mature and strong on faceted search, and remains common in library and catalogue systems.

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.

Apache Solr: Is Solr still maintained?

Yes, actively, as a top-level Apache 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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