Developer Tools · head to head
ESLint vs Feedzai
Feedzai
Cybersecurity
Real-time transaction fraud and financial crime detection for banks and payment processors
- 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; Feedzai pricing is per transaction with an annual minimum, so a bank with seasonal or growing volume commits to a floor it may not use and pays overage above the band.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which ESLint and Feedzai 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 Feedzai does not also cover.
Only in Feedzai
- Real-time scoring
- Rule and model hybrid
- Case manager
- Behavioural biometrics
- Model explainability
- Deployment options
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 Feedzai
- Automatically fixing issues with syntax-aware rewritesnot Feedzai
- Enforcing a consistent code style across a teamnot Feedzai
- Running as a CI step to block non-conforming codenot Feedzai
- Writing custom rules for project-specific conventionsnot Feedzai
Feedzai
- A bank joining an instant payments scheme where transfers are irrevocable and post-hoc recovery is impossiblenot ESLint
- A card issuer whose existing rules engine cannot be changed without a release, so fraud waves run for daysnot ESLint
- An acquirer needing per-merchant risk models rather than one portfolio-wide modelnot ESLint
- A bank required by its regulator to explain automated declines to customers, which rules out opaque scoringnot 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
Feedzai
- Pricing is per transaction with an annual minimum, so a bank with seasonal or growing volume commits to a floor it may not use and pays overage above the band.
- It sits in the authorisation path, which makes every upgrade a change-controlled event with rollback plans, and the operational burden falls on the bank rather than the vendor.
- Out of the box models need months of the customer own labelled fraud history before they beat the rules they replace, so the value case starts late.
- AML and fraud are licensed as separate modules, so institutions expecting one platform fee find the transaction monitoring capability is a second line item.
- The buyer profile is large institutions, so smaller banks and fintechs face minimums that make per-transaction economics unattractive below significant scale.
Pricing, plan by plan
ESLint
FreeNo published plan breakdown. See the ESLint review.
Feedzai
On request- Feedzai Financial Crime Platform$undefined/year
- Priced by transaction volume with annual minimum commitment
- Modules for fraud, AML and account opening licensed separately
- Cloud, private cloud and on-premises deployment
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 Feedzai if
- You need real-time scoring.
- You work on Web, Linux.
- You also want rule and model hybrid.
Questions people ask
- Is ESLint or Feedzai better?
- Neither clearly leads. ESLint starts at Free and Feedzai at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, ESLint or Feedzai?
- ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and On request for Feedzai.
- Does ESLint or Feedzai run on more platforms?
- ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. Feedzai runs on Web, Linux.
- Can I use ESLint for free?
- Yes. ESLint has a free tier, so you can try it without paying. Feedzai 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 Feedzai is typically brought in for.
- What can ESLint do that Feedzai cannot?
- Feedzai covers Real-time scoring, Rule and model hybrid, Case manager, Behavioural biometrics.
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.
SourceFeedzai: Can Feedzai run on-premises?
Yes. On-premises and private cloud deployments are supported, which is why it appears in markets where transaction data cannot legally leave the country.
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.
SourceFeedzai: Does it cover AML as well as fraud?
It does, but transaction monitoring is a separately licensed module. Assume two line items if you want both.
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.
SourceFeedzai: How fast are decisions?
Designed for the authorisation window, typically tens of milliseconds. This is the constraint that rules out batch scoring architectures.
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- Feedzai vs Sumsub
- Feedzai vs iDenfy
- Feedzai vs BeyondTrust
- Feedzai vs Bitdefender VPN
- Feedzai vs Burp Suite
- Feedzai vs Check Point Software
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