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APIs · head to head

Janus Gateway vs Temenos Transact

Janus Gateway logo

Janus Gateway

APIs

WebRTC gateway and media server for real-time communication

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 Janus Gateway has a free tier, so it costs nothing to try first.
  • Each has a real cost: Janus Gateway no commercial pricing published; open-source project without official commercial offerings; 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: Janus Gateway covers WebRTC Gateway, 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 Janus Gateway and Temenos Transact actually diverge.

Attributes where Janus Gateway and Temenos Transact differ
AttributeJanus GatewayTemenos Transact
Starting priceFreeOn request
Pricing modelopen-sourcequote
Free tierYesNo
PlatformsLinux, MacOS, BSDWeb, Linux, Windows, REST API
Founded2010Unknown

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 Janus Gateway

  • WebRTC Gateway
  • Media Routing
  • Video Conferencing
  • RTP
  • SRTP
  • REST API
  • Linux support
  • MacOS 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.

Janus Gateway

  • 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 Janus Gateway
  • An institution running Islamic banking products alongside conventional ones on one corenot Janus Gateway
  • A bank that needs a large pool of experienced implementation consultants to de-risk a migrationnot Janus Gateway
  • A group standardising subsidiaries in several countries onto one core banking systemnot Janus Gateway

Where each one falls short

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

Janus Gateway

  • No commercial pricing published; open-source project without official commercial offerings
  • Community-supported only; no vendor commercial support or SLA available

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

Janus Gateway

Free
  • Open SourceFree
    • Core WebRTC gateway
    • 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 Janus Gateway if

  • You need webrtc gateway.
  • You want to start without paying.
  • You work on Linux, MacOS, BSD.
  • You also want media routing.
Janus Gateway 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 Janus Gateway or Temenos Transact better?
Neither clearly leads. Janus Gateway 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, Janus Gateway or Temenos Transact?
Janus Gateway has a free tier; the other does not. Paid plans start at Free for Janus Gateway and On request for Temenos Transact.
Does Janus Gateway or Temenos Transact run on more platforms?
Janus Gateway runs on Linux, MacOS, BSD. Temenos Transact runs on Web, Linux, Windows, REST API.
Can I use Janus Gateway for free?
Yes. Janus Gateway has a free tier, so you can try it without paying. Temenos Transact starts at On request.
What is Janus Gateway best used for?
Janus Gateway 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 Janus Gateway do that Temenos Transact cannot?
Janus Gateway covers WebRTC Gateway, Media Routing, Video Conferencing, RTP. Temenos Transact covers Country model banks, Multi-product core, Payments processing, API layer.

Answered from the vendors’ own pages

Janus Gateway: How much does Janus Gateway cost?

Janus Gateway has no pricing model; it is a free open-source WebRTC server developed by Meetecho. The general-purpose server is available for download at no cost. There are no subscription tiers or commercial licensing fees.

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.

Janus Gateway: Is Janus Gateway supported commercially?

Janus Gateway is community-supported open-source software with no official commercial support or SLA from the vendors. While Meetecho developed the project, users must rely on community documentation and forums for assistance.

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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