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APIs · head to head

Temenos Transact vs Zeplo

Temenos Transact logo

Temenos Transact

APIs

Established core banking system used by banks in over a hundred countries

From
On request
Rated
-
Full reviewWebsite
Zeplo logo

Zeplo

APIs

Message queue as a URL prefix, adding retries and delays to any HTTP request

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Zeplo has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; Zeplo zeplo sits directly in the execution path of your background work, so an outage at a very small vendor means your jobs do not run at all, and there is no published SLA below Enterprise.
  • They diverge on capability: Temenos Transact covers Country model banks, Zeplo covers URL prefix interface.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Temenos Transact and Zeplo actually diverge.

Attributes where Temenos Transact and Zeplo differ
AttributeTemenos TransactZeplo
Starting priceOn requestFree
Pricing modelquotePer month by request count
Free tierNoYes
PlatformsWeb, Linux, Windows, REST APIWeb, Cloud

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 Temenos Transact

  • Country model banks
  • Multi-product core
  • Payments processing
  • API layer
  • Cloud deployment
  • Accounting engine

Only in Zeplo

  • URL prefix interface
  • Retries with backoff
  • Delayed delivery
  • Cron scheduling
  • Concurrency limits
  • Deduplication keys
  • Request logs
  • Team workspaces

What people use each for

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

Temenos Transact

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

Zeplo

  • A Vercel or Cloudflare Workers application that needs retried background jobs without deploying a separate always-on workernot Temenos Transact
  • A team that wants a webhook receiver protected by a concurrency limit so a burst does not overwhelm a downstream APInot Temenos Transact
  • A small product needing cron jobs against HTTP endpoints without adding a scheduler to its infrastructurenot Temenos Transact
  • A developer adding idempotent retries to an unreliable third-party API call with a one-line URL changenot Temenos Transact

Where each one falls short

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

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.

Zeplo

  • Zeplo sits directly in the execution path of your background work, so an outage at a very small vendor means your jobs do not run at all, and there is no published SLA below Enterprise.
  • The free Developer tier includes only 500 requests a month and one team member, so it is a demonstration allowance rather than a usable free plan for anything real.
  • Overage on the Developer tier is 20 US dollars per 100,000 requests, two hundred times the marginal rate on the Company tier, so exceeding the free allowance without upgrading is expensive.
  • Team members cost 15 US dollars each beyond the plan allowance, which is an odd charge on an infrastructure product billed by request volume.
  • Log retention is 30 days on both published tiers, so anything requiring longer audit trails on job execution has to be logged separately.

Pricing, plan by plan

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

Zeplo

Free
  • DeveloperFree
    • 500 requests a month included
    • $20 per additional 100,000 requests
    • 1 team member
  • Company$39/month
    • 1,000,000 requests a month included
    • $10 per additional million requests
    • Up to 3 team members
  • Enterprise$undefined/month
    • Volume discounts
    • Custom team size
    • Support with SLA

Which should you pick?

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

Choose Zeplo if

  • You need url prefix interface.
  • You want to start without paying.
  • You work on Web, Cloud.
  • You also want retries with backoff.
Zeplo review

Questions people ask

Is Temenos Transact or Zeplo better?
Neither clearly leads. Temenos Transact starts at On request and Zeplo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Temenos Transact or Zeplo?
Zeplo has a free tier; the other does not. Paid plans start at On request for Temenos Transact and Free for Zeplo.
Does Temenos Transact or Zeplo run on more platforms?
Temenos Transact runs on Web, Linux, Windows, REST API. Zeplo runs on Web, Cloud.
Can I use Zeplo for free?
Yes. Zeplo has a free tier, so you can try it without paying. Temenos Transact starts at On request.
What is Temenos Transact best used for?
Temenos Transact is most often used for a bank in an emerging market needing local regulatory compliance without building it from scratch, an institution running islamic banking products alongside conventional ones on one core, a bank that needs a large pool of experienced implementation consultants to de-risk a migration, a group standardising subsidiaries in several countries onto one core banking system. Of those, a bank in an emerging market needing local regulatory compliance without building it from scratch and an institution running islamic banking products alongside conventional ones on one core are not what Zeplo is typically brought in for.
What can Temenos Transact do that Zeplo cannot?
Temenos Transact covers Country model banks, Multi-product core, Payments processing, API layer. Zeplo covers URL prefix interface, Retries with backoff, Delayed delivery, Cron scheduling.

Answered from the vendors’ own pages

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.

Zeplo: How does Zeplo work?

You prefix your endpoint URL with zeplo.to and add query parameters for retries, delay, cron or concurrency. No SDK or broker is needed.

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.

Zeplo: What does it cost?

Free for 500 requests a month; 39 US dollars a month for a million requests, then 10 dollars per additional 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.

Zeplo: Is it suitable for critical jobs?

It is a small vendor in your execution path with no published SLA below Enterprise, so weigh that against the convenience.

Zeplo: Does it work with serverless platforms?

Yes, that is its main use, covering Vercel, Cloudflare Workers, Netlify and similar environments that lack long-running workers.

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