Developer Tools · head to head
Keycloak vs Zeta
Keycloak
Developer Tools
Open-source identity and access management server.
- From
- Free
- Free plan
- Yes
Zeta
Technology
Cloud native credit card processing and core banking from Bhavin Turakhia's Zeta
- From
- On request
- Free plan
- No
The short version
- Only Keycloak has a free tier, so it costs nothing to try first.
- Each has a real cost: Keycloak requires self-hosted deployment and operational expertise to install, configure and maintain; 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.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Keycloak and Zeta actually diverge.
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 Keycloak
Nothing recorded that Zeta does not also cover.
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.
Keycloak
- Organisations requiring self-hosted identity infrastructure for compliance or data residencynot Zeta
- Companies with existing LDAP/Active Directory systems needing federated authenticationnot Zeta
- Open-source projects and communities requiring free IAM without licensing costsnot Zeta
- Enterprises building custom identity workflows requiring fine-grained authorisationnot Zeta
- Teams with sufficient operational expertise to manage infrastructurenot Zeta
Zeta
- A United States bank whose card platform makes launching a new rewards product a multi quarter vendor projectnot Keycloak
- An issuer that wants authorisation level controls and real time data rather than end of day filesnot Keycloak
- A large fintech launching a credit card programme at scale with custom product logicnot Keycloak
- A bank consolidating card and deposit processing onto one modern platformnot Keycloak
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Keycloak
- Requires self-hosted deployment and operational expertise to install, configure and maintain
- No managed cloud option provided by Red Hat; organisations must operate infrastructure themselves or use third-party distributions
- Clustering and high-availability configurations require additional operational knowledge
- Community support only; commercial support requires third-party vendors or distributions
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
Keycloak
Free- Open-sourceFree
- Full platform functionality
- Self-hosted deployment
- Community 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 Keycloak if
- You want to start without paying.
- You work on Self-hosted, Docker, Kubernetes, Linux, Windows, API.
Choose Zeta if
- You need tachyon card processing.
- You work on Web, API, Cloud, iOS, Android.
- You also want real time authorisation.
Questions people ask
- Is Keycloak or Zeta better?
- Neither clearly leads. Keycloak 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, Keycloak or Zeta?
- Keycloak has a free tier; the other does not. Paid plans start at Free for Keycloak and On request for Zeta.
- Does Keycloak or Zeta run on more platforms?
- Keycloak runs on Self-hosted, Docker, Kubernetes, Linux, Windows, API. Zeta runs on Web, API, Cloud, iOS, Android.
- Can I use Keycloak for free?
- Yes. Keycloak has a free tier, so you can try it without paying. Zeta starts at On request.
- What is Keycloak best used for?
- Keycloak is most often used for organisations requiring self-hosted identity infrastructure for compliance or data residency, companies with existing ldap/active directory systems needing federated authentication, open-source projects and communities requiring free iam without licensing costs, enterprises building custom identity workflows requiring fine-grained authorisation. Of those, organisations requiring self-hosted identity infrastructure for compliance or data residency and companies with existing ldap/active directory systems needing federated authentication are not what Zeta is typically brought in for.
- What can Keycloak do that Zeta cannot?
- Zeta covers Tachyon card processing, Real time authorisation, Rewards and offers engine, Core banking modules.
Answered from the vendors’ own pages
Keycloak: What protocols does Keycloak support?
Keycloak supports OpenID Connect, OAuth 2.0 and SAML 2.0 protocols for authentication and authorisation.
SourceZeta: 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.
Keycloak: Can Keycloak integrate with existing user directories?
Yes. Keycloak supports user federation with LDAP and Active Directory systems, allowing organisations to leverage existing user directories.
SourceZeta: What is its strongest use case?
United States credit card issuing and processing, where legacy platforms make product changes slow and expensive.
Keycloak: Is Keycloak free?
Yes. Keycloak is fully open-source and free to deploy and use. No licensing fees are required.
SourceZeta: Does Zeta provide the BIN or licence?
No. It processes. Network membership, BIN sponsorship and regulatory obligations stay with the issuer.
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