Technology · head to head
Postgres vs Zeta
Zeta
Technology
Cloud native credit card processing and core banking from Bhavin Turakhia's Zeta
- From
- On request
- Rated
- -
The short version
- Only Postgres has a free tier, so it costs nothing to try first.
- Each has a real cost: Postgres each major version is supported for only 5 years after its initial release, after which it is end-of-life; 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: Postgres covers ACID compliance, Zeta covers Tachyon card processing.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Postgres and Zeta actually diverge.
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 Postgres
- ACID compliance
- Complex queries
- Foreign keys
- Triggers
- Views
- Stored procedures
- JSON/JSONB support
- Full-text search
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.
Postgres
- Running a general purpose relational database for applicationsnot Zeta
- Self-hosting an open source SQL database with no licence feenot Zeta
- Workloads needing extensions, JSON and full text search in one enginenot Zeta
Zeta
- A United States bank whose card platform makes launching a new rewards product a multi quarter vendor projectnot Postgres
- An issuer that wants authorisation level controls and real time data rather than end of day filesnot Postgres
- A large fintech launching a credit card programme at scale with custom product logicnot Postgres
- A bank consolidating card and deposit processing onto one modern platformnot Postgres
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Postgres
- Each major version is supported for only 5 years after its initial release, after which it is end-of-life
- Major version upgrades break on-disk compatibility and require a full dump and reload or the pg_upgrade tool
- New major versions ship about once a year, so staying supported means a disruptive upgrade cycle
- Minor releases contain only frequently-encountered bug fixes, low-risk fixes, security issues and data corruption fixes, so feature gaps are not addressed within a major version
- There is no vendor SLA; commercial support must be bought separately from third party professional services listed by the project
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
Postgres
Free- Community EditionFree
- Full database features
- No limitations
- 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 Postgres if
- You need acid compliance.
- You want to start without paying.
- You work on Linux, Windows, Macos, Docker.
- You also want complex queries.
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 Postgres or Zeta better?
- Neither clearly leads. Postgres 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, Postgres or Zeta?
- Postgres has a free tier; the other does not. Paid plans start at Free for Postgres and On request for Zeta.
- Does Postgres or Zeta run on more platforms?
- Postgres runs on Linux, Windows, Macos, Docker. Zeta runs on Web, API, Cloud, iOS, Android.
- Can I use Postgres for free?
- Yes. Postgres has a free tier, so you can try it without paying. Zeta starts at On request.
- What is Postgres best used for?
- Postgres is most often used for running a general purpose relational database for applications, self-hosting an open source sql database with no licence fee, workloads needing extensions, json and full text search in one engine. Of those, running a general purpose relational database for applications and self-hosting an open source sql database with no licence fee are not what Zeta is typically brought in for.
- What can Postgres do that Zeta cannot?
- Postgres covers ACID compliance, Complex queries, Foreign keys, Triggers. Zeta covers Tachyon card processing, Real time authorisation, Rewards and offers engine, Core banking modules.
Answered from the vendors’ own pages
Postgres: How much does PostgreSQL cost to use?
PostgreSQL is completely free to download, install, and use. No licensing fees, subscription costs, or per-seat charges apply. The database is open source under the PostgreSQL License. Source: https://www.postgresql.org
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.
Postgres: Are there commercial PostgreSQL support options available?
Official PostgreSQL (the project) is free. Commercial PostgreSQL services such as hosting, professional support, training, and managed database services are offered by third-party vendors, not the PostgreSQL project itself. Source: https://www.postgresql.org
SourceZeta: What is its strongest use case?
United States credit card issuing and processing, where legacy platforms make product changes slow and expensive.
Postgres: Do I need a license to use PostgreSQL commercially?
No. PostgreSQL is open source under the PostgreSQL License, which permits free commercial use without royalties, licensing fees, or support obligations. Source: https://www.postgresql.org
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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- Zeta vs Datadog
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- Zeta vs Mozilla Firefox
- Zeta vs Confluent Cloud
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- Zeta vs Microsoft Outlook
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- Zeta vs PyCharm
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