Developer Tools · head to head
ESLint vs Signicat
Signicat
Cybersecurity
European digital identity hub connecting national eID schemes
- 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; Signicat national eID scheme fees are passed through on top of Signicat's own charge, so a single-country business almost always pays less by integrating with the scheme directly.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which ESLint and Signicat 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 Signicat does not also cover.
Only in Signicat
- eID scheme brokering
- Qualified electronic signatures
- Document verification
- AML screening
- Authentication
- Digital onboarding flows
- eIDAS compliance
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 Signicat
- Automatically fixing issues with syntax-aware rewritesnot Signicat
- Enforcing a consistent code style across a teamnot Signicat
- Running as a CI step to block non-conforming codenot Signicat
- Writing custom rules for project-specific conventionsnot Signicat
Signicat
- A lender expanding from Norway into Sweden, Denmark and the Netherlands without four separate eID integrationsnot ESLint
- An insurer needing eIDAS qualified signatures on policy documents that will hold up in a European courtnot ESLint
- A bank that wants customers to onboard with their existing national bank ID rather than photographing a passportnot ESLint
- A public sector body needing cross-border recognition of notified eID schemes under eIDASnot 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
Signicat
- National eID scheme fees are passed through on top of Signicat's own charge, so a single-country business almost always pays less by integrating with the scheme directly.
- Value is concentrated in Northern and Western Europe, and coverage in Southern and Eastern Europe is thinner, so a pan-European rollout still hits gaps requiring document fallback.
- Pricing is per transaction and quoted, and because scheme rates vary by country the cost per onboarded customer differs materially between markets in ways that complicate unit economics.
- Each eID scheme connection typically carries its own setup fee and approval process, so adding a country is a project with a lead time rather than a configuration change.
- Availability is tied to the national schemes, meaning an outage at BankID or MitID stops your onboarding entirely and there is no vendor-side mitigation for it.
Pricing, plan by plan
ESLint
FreeNo published plan breakdown. See the ESLint review.
Signicat
On request- Signicat Platform$undefined/year
- Priced per transaction with national scheme fees passed through
- Signature and verification products licensed separately
- Setup fee per eID scheme connected
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 Signicat if
- You need eid scheme brokering.
- You work on Web, iOS, Android.
- You also want qualified electronic signatures.
Questions people ask
- Is ESLint or Signicat better?
- Neither clearly leads. ESLint starts at Free and Signicat at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, ESLint or Signicat?
- ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and On request for Signicat.
- Does ESLint or Signicat run on more platforms?
- ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. Signicat runs on Web, iOS, Android.
- Can I use ESLint for free?
- Yes. ESLint has a free tier, so you can try it without paying. Signicat 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 Signicat is typically brought in for.
- What can ESLint do that Signicat cannot?
- Signicat covers eID scheme brokering, Qualified electronic signatures, Document verification, AML screening.
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.
SourceSignicat: Is this an alternative to a document verification vendor?
Only where national eID exists. In markets with a mature bank ID scheme it is better; elsewhere you fall back to document checks, which Signicat also provides.
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.
SourceSignicat: Do we still pay the eID schemes?
Yes. Scheme fees are passed through in addition to Signicat charges. Ask for the split when comparing to a direct integration.
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.
SourceSignicat: Are signatures legally qualified?
Signicat supports eIDAS qualified electronic signatures, which carry the highest legal standing in the EU, as well as advanced signatures.
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