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APIs · head to head

AWS API Gateway vs Temenos Transact

AWS API Gateway logo

AWS API Gateway

APIs

Fully managed API gateway service for creating and managing APIs at scale

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 AWS API Gateway has a free tier, so it costs nothing to try first.
  • Each has a real cost: AWS API Gateway rEST APIs cost $3.50 per million calls against $1.00 for HTTP APIs, so the older and more featureful type is three and a half times dearer; 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: AWS API Gateway covers REST APIs, 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 AWS API Gateway and Temenos Transact actually diverge.

Attributes where AWS API Gateway and Temenos Transact differ
AttributeAWS API GatewayTemenos Transact
Starting priceFreeOn request
Pricing modelusage-basedquote
Free tierYesNo
PlatformsAWS CloudWeb, Linux, Windows, REST API
Founded2006Unknown

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 AWS API Gateway

  • REST APIs
  • WebSocket APIs
  • HTTP APIs
  • Lambda
  • EC2
  • DynamoDB
  • CloudWatch
  • IAM

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.

AWS API Gateway

  • Fronting Lambda functions with an HTTP endpointnot Temenos Transact
  • REST and HTTP API management with throttling and keysnot Temenos Transact
  • WebSocket APIs for real-time clientsnot Temenos Transact
  • Private APIs reachable only inside a VPCnot Temenos Transact
  • Publishing a developer portal for API consumersnot Temenos Transact

Temenos Transact

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

Where each one falls short

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

AWS API Gateway

  • REST APIs cost $3.50 per million calls against $1.00 for HTTP APIs, so the older and more featureful type is three and a half times dearer
  • Data transfer out is charged at $0.09 per GB on top of request pricing
  • WebSocket APIs bill connection minutes as well as messages, at $0.25 per million minutes
  • Private APIs avoid data transfer charges but incur AWS PrivateLink costs instead
  • The developer portal is $125 a month, with additional portal products at $12.50 each
  • The free tier lasts 12 months rather than being ongoing

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

AWS API Gateway

Free
  • Free Tier (12 months)Free
    • 1M REST API calls per month
    • 1M HTTP API calls per month
    • 1M WebSocket messages plus 750K connection minutes per month
  • HTTP APIs$1/per million requests (first 300M)
    • First 300M: $1.00 per million
    • Next 132M: $0.90 per million
    • Data transfer varies by volume
  • REST APIs$3.5/per million API calls
    • Edge Optimized and Regional: $3.50 per million (first tier)
    • Higher volumes: $2.80 then $2.38 per million
    • Data transfer: $0.09 per GB
  • WebSocket APIs$1/per million messages
    • Messages: $1.00 per million
    • Connection minutes: $0.25 per million minutes

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 AWS API Gateway if

  • You need rest apis.
  • You want to start without paying.
  • You work on AWS Cloud.
  • You also want websocket apis.
AWS API 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 AWS API Gateway or Temenos Transact better?
Neither clearly leads. AWS API 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, AWS API Gateway or Temenos Transact?
AWS API Gateway has a free tier; the other does not. Paid plans start at Free for AWS API Gateway and On request for Temenos Transact.
Does AWS API Gateway or Temenos Transact run on more platforms?
AWS API Gateway runs on AWS Cloud. Temenos Transact runs on Web, Linux, Windows, REST API.
Can I use AWS API Gateway for free?
Yes. AWS API Gateway has a free tier, so you can try it without paying. Temenos Transact starts at On request.
What is AWS API Gateway best used for?
AWS API Gateway is most often used for fronting lambda functions with an http endpoint, rest and http api management with throttling and keys, websocket apis for real-time clients, private apis reachable only inside a vpc. Of those, fronting lambda functions with an http endpoint and rest and http api management with throttling and keys are not what Temenos Transact is typically brought in for.
What can AWS API Gateway do that Temenos Transact cannot?
AWS API Gateway covers REST APIs, WebSocket APIs, HTTP APIs, Lambda. Temenos Transact covers Country model banks, Multi-product core, Payments processing, API layer.

Answered from the vendors’ own pages

AWS API Gateway: How much does AWS API Gateway cost?

AWS API Gateway pricing varies by API type. HTTP APIs cost $1.00 per million requests for the first 300M monthly, then $0.90 per million. REST APIs cost $3.50 per million, and WebSocket APIs cost $1.00 per million messages plus $0.25 per million connection minutes. Data transfer charges ($0.09 per GB) apply separately.

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.

AWS API Gateway: Is AWS API Gateway free?

New AWS customers receive 12 months of free tier access including 1 million REST API calls, 1 million HTTP API calls, and 1 million WebSocket messages plus 750,000 connection minutes per month. Starting July 15, 2025, new customers receive up to $200 in AWS Free Tier credits.

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.

AWS API Gateway: What is the price difference between HTTP and REST APIs?

HTTP APIs are significantly cheaper at $1.00 per million requests compared to REST APIs at $3.50 per million (first tier). REST API pricing decreases to $2.80 and $2.38 per million for higher volumes, while HTTP API pricing drops to $0.90 per million after 300M monthly requests.

Source
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.

AWS API Gateway: How much does an API Gateway Portal cost?

API Gateway Portals require a base fee of $125 per month (includes 10 PortalProducts with 40 endpoints each) plus $12.50 per month for each additional PortalProduct beyond the included 10.

Source
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