Developer Tools · head to head
ESLint vs Zeta
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 ESLint has a free tier, so it costs nothing to try first.
- Each has a real cost: ESLint slow performance on large codebases compared to newer tools like Oxlint and Biome; 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 ESLint 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 ESLint
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.
ESLint
- Statically analysing JavaScript and JSX to find problems before runtimenot Zeta
- Automatically fixing issues with syntax-aware rewritesnot Zeta
- Enforcing a consistent code style across a teamnot Zeta
- Running as a CI step to block non-conforming codenot Zeta
- Writing custom rules for project-specific conventionsnot Zeta
Zeta
- A United States bank whose card platform makes launching a new rewards product a multi quarter vendor projectnot ESLint
- An issuer that wants authorisation level controls and real time data rather than end of day filesnot ESLint
- A large fintech launching a credit card programme at scale with custom product logicnot ESLint
- A bank consolidating card and deposit processing onto one modern platformnot ESLint
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
ESLint
- Slow performance on large codebases compared to newer tools like Oxlint and Biome
- Complexity in configuration from scratch, particularly for TypeScript support
- Limited built-in TypeScript support, requiring separate parsers and coordination with new TypeScript features
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
ESLint
FreeNo published plan breakdown. See the ESLint review.
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 ESLint if
- You want to start without paying.
- You work on Browser-based JavaScript, Node.js, Any JavaScript environment.
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 ESLint or Zeta better?
- Neither clearly leads. ESLint 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, ESLint or Zeta?
- ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and On request for Zeta.
- Does ESLint or Zeta run on more platforms?
- ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. Zeta runs on Web, API, Cloud, iOS, Android.
- Can I use ESLint for free?
- Yes. ESLint has a free tier, so you can try it without paying. Zeta starts at On request.
- What is ESLint best used for?
- ESLint is most often used for statically analysing javascript and jsx to find problems before runtime, automatically fixing issues with syntax-aware rewrites, enforcing a consistent code style across a team, running as a ci step to block non-conforming code. Of those, statically analysing javascript and jsx to find problems before runtime and automatically fixing issues with syntax-aware rewrites are not what Zeta is typically brought in for.
- What can ESLint 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
ESLint: Does ESLint automatically fix code issues?
Many problems ESLint finds can be automatically fixed via the --fix flag. ESLint fixes are syntax-aware so you won't experience errors introduced by traditional find-and-replace algorithms.
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.
ESLint: How much does ESLint cost?
ESLint is completely free and open-source software maintained by the OpenJS Foundation. The project accepts voluntary donations from sponsors.
SourceZeta: What is its strongest use case?
United States credit card issuing and processing, where legacy platforms make product changes slow and expensive.
ESLint: Can I write custom ESLint rules?
Yes. You can develop custom rules that work alongside built-in functionality through ESLint's plugin system, allowing complete customization for your project needs.
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 Buildkite
- Zeta vs Argo CD
- Zeta vs GitLab CI/CD
- Zeta vs HCP Terraform
- Zeta vs Helm
- Zeta vs Earthly
- Zeta vs Eclipse IDE
- Zeta vs Moonrepo
- Zeta vs Nx Cloud
- Zeta vs Pants Build
- Zeta vs Finxact
- Zeta vs Thought Machine
- Zeta vs Alkami
- Zeta vs Apache Spark
- Zeta vs Nagios XI
- Zeta vs Shortcut
- Zeta vs Linear
- Zeta vs Datadog
- Zeta vs Greenhouse
- Zeta vs Google Chrome
- Zeta vs Mozilla Firefox
- Zeta vs Confluent Cloud
- Zeta vs Heap
- Zeta vs Microsoft Edge
- Zeta vs Netlify
- Zeta vs Productboard
- Zeta vs Sentry
- Zeta vs Trino