Softwr

Technology · head to head

Postman vs Zeta

Postman logo

Postman

Technology

The API platform for building and using APIs

From
Free
Rated
-
Full reviewWebsite
Zeta logo

Zeta

Technology

Cloud native credit card processing and core banking from Bhavin Turakhia's Zeta

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Postman has a free tier, so it costs nothing to try first.
  • Each has a real cost: Postman free plan limited to single user as of March 1, 2026, making it unsuitable for teams without paid plans; Zeta it competes against card processors with decades of production track record, and in card processing an outage is a public event, so a shorter operational history is a genuine risk factor rather than a technicality.
  • They diverge on capability: Postman covers API client, Zeta covers Tachyon card processing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Postman and Zeta actually diverge.

Attributes where Postman and Zeta differ
AttributePostmanZeta
Starting priceFreeOn request
Pricing modelUnknownquote
Free tierYesNo
PlatformsWeb, Windows, macOS, LinuxWeb, API, Cloud, iOS, Android
Founded2014Unknown

Identical on both: user rating (Not yet rated), category (Technology).

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 Postman

  • API client
  • Automated testing
  • Mock servers
  • Documentation
  • Monitors
  • Workspaces
  • Version control
  • API design

Only in Zeta

  • Tachyon card processing
  • Real time authorisation
  • Rewards and offers engine
  • Core banking modules
  • Programme configuration
  • Mobile and web SDKs
  • Fraud and controls
  • Cloud deployment

What people use each for

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

Postman

  • API testingnot Zeta
  • API documentationnot Zeta
  • API monitoringnot Zeta
  • Team collaborationnot Zeta
  • API developmentnot Zeta

Zeta

  • A United States bank whose card platform makes launching a new rewards product a multi quarter vendor projectnot Postman
  • An issuer that wants authorisation level controls and real time data rather than end of day filesnot Postman
  • A large fintech launching a credit card programme at scale with custom product logicnot Postman
  • A bank consolidating card and deposit processing onto one modern platformnot Postman

Where each one falls short

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

Postman

  • Free plan limited to single user as of March 1, 2026, making it unsuitable for teams without paid plans
  • Only 25 collection runs per month and 1,000 API calls/month on free tier
  • Removed local-only Scratch Pad mode in 2023, forcing cloud account creation and sync
  • Requires Postman account and internet connection for most features
  • Cloud-first architecture with mandatory syncing to Postman's cloud servers
  • No CI/CD integration or advanced security features on free plan

Zeta

  • It competes against card processors with decades of production track record, and in card processing an outage is a public event, so a shorter operational history is a genuine risk factor rather than a technicality.
  • Contracts are enterprise scale and quoted with volume minimums, which puts it out of reach of small issuers who would otherwise benefit most from modern tooling.
  • A card portfolio migration runs twelve to twenty four months at minimum, during which the issuer runs two platforms and pays for both.
  • Zeta is a processor rather than a licence holder, so network membership, BIN sponsorship and regulatory obligations remain entirely with the issuer.
  • Public references for large live United States production volumes are fewer than the announcements imply, so diligence should insist on active account counts and uptime history rather than partnership press releases.

Pricing, plan by plan

Postman

Free
  • FreeFree
    • 1 user
    • 25 collection runs/month
    • 1,000 API calls/month
  • Team$14/month
    • Team collaboration
    • Shared workspaces
    • API mocking
  • Professional$29/month
    • Team features
    • Advanced security
    • SSO
  • Enterprise$49/month
    • Professional features
    • Custom integrations
    • Priority support

Zeta

On request
  • Tachyon platform$undefined/year
    • Quoted per institution, commonly on active accounts or transaction volume
    • Implementation for a card portfolio migration measured in quarters to years
    • Minimum volume commitments typical on enterprise contracts

Which should you pick?

Choose Postman if

  • You need api client.
  • You want to start without paying.
  • You work on Web, Windows, macOS, Linux.
  • You also want automated testing.
Postman review

Choose Zeta if

  • You need tachyon card processing.
  • You work on Web, API, Cloud, iOS, Android.
  • You also want real time authorisation.
Zeta review

Questions people ask

Is Postman or Zeta better?
Neither clearly leads. Postman starts at Free and Zeta at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Postman or Zeta?
Postman has a free tier; the other does not. Paid plans start at Free for Postman and On request for Zeta.
Does Postman or Zeta run on more platforms?
Postman runs on Web, Windows, macOS, Linux. Zeta runs on Web, API, Cloud, iOS, Android.
Can I use Postman for free?
Yes. Postman has a free tier, so you can try it without paying. Zeta starts at On request.
What is Postman best used for?
Postman is most often used for api testing, api documentation, api monitoring, team collaboration. Of those, api testing and api documentation are not what Zeta is typically brought in for.
What can Postman do that Zeta cannot?
Postman covers API client, Automated testing, Mock servers, Documentation. Zeta covers Tachyon card processing, Real time authorisation, Rewards and offers engine, Core banking modules.

Answered from the vendors’ own pages

Postman: What is the cost of Postman?

Postman has a free plan limited to 1 user, 25 collection runs/month, 1,000 API calls/month. Team plans start at $14/user/month for Basic. Professional at $29/user/month, and Enterprise at $49/user/month.

Source
Zeta: Which Zeta is this?

The banking technology company founded by Bhavin Turakhia, which builds the Tachyon card processing and core banking platform. Not any similarly named payroll or accounting product.

Postman: Can I use Postman offline?

Postman requires an internet connection to sync collections to the cloud. Since 2023, the Scratch Pad local-only mode was removed. Users must sign in with a Postman account, and collections sync to cloud by default. Offline work is possible but limited without cloud sync features.

Source
Zeta: What is its strongest use case?

United States credit card issuing and processing, where legacy platforms make product changes slow and expensive.

Postman: Does Postman have team collaboration?

Team collaboration is not available on the free plan (limited to 1 user). Team plans start at $14/user/month and include shared workspaces, real-time collaboration, and team management features.

Source
Zeta: Does Zeta provide the BIN or licence?

No. It processes. Network membership, BIN sponsorship and regulatory obligations stay with the issuer.

Postman: What are the free plan limits?

Free plan allows: 1 user only, 25 collection runs per month, 1,000 API calls/month, and 1,000 mock server calls/month. No CI/CD integration or advanced security features.

Source
Postman: Does Postman work with other development tools?

Postman integrates with Git repositories, offers a Node.js runner (Newman) for automation, and connects with popular CI/CD platforms. Teams using git-native workflows may prefer alternatives like Bruno.

Source
Share

Related pages

More on Postman

More on Zeta

Keep looking

Other head to heads