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Cybersecurity · head to head

Authelia vs ESLint

Authelia logo

Authelia

Cybersecurity

Open-source authentication and two-factor portal for reverse proxies

From
Free
Rated
-
Full reviewWebsite
ESLint logo

ESLint

Developer Tools

Find and fix problems in JavaScript code

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Authelia depends on a reverse proxy: it is not a standalone identity provider; ESLint slow performance on large codebases compared to newer tools like Oxlint and Biome

Where they differ

Only the attributes on which Authelia and ESLint actually diverge.

Attributes where Authelia and ESLint differ
AttributeAutheliaESLint
Pricing modelOpen source, no licence feeUnknown
PlatformsDocker, Kubernetes, Linux, Self-hostedBrowser-based JavaScript, Node.js, Any JavaScript environment
CategoryCybersecurityDeveloper Tools
FoundedUnknown2019

Identical on both: starting price (Free), free tier (Yes), 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 Authelia

  • Reverse proxy integration
  • Two-factor authentication
  • Access control rules
  • Lightweight backends

Only in ESLint

Nothing recorded that Authelia does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Authelia

  • Putting a login and 2FA in front of self-hosted services that have nonenot ESLint
  • Adding SSO across a small set of internal tools without a full identity platformnot ESLint
  • Home and small-team infrastructure behind a single reverse proxynot ESLint

ESLint

  • Statically analysing JavaScript and JSX to find problems before runtimenot Authelia
  • Automatically fixing issues with syntax-aware rewritesnot Authelia
  • Enforcing a consistent code style across a teamnot Authelia
  • Running as a CI step to block non-conforming codenot Authelia
  • Writing custom rules for project-specific conventionsnot Authelia

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Authelia

  • Depends on a reverse proxy: it is not a standalone identity provider
  • Configuration is YAML-first with no administrative interface, so changes mean editing files
  • Not a full IAM: user management, provisioning and federation are limited compared with Keycloak
  • Scales poorly as an organisation-wide identity solution, which is not its target

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

Pricing, plan by plan

Authelia

Free
  • AutheliaFree
    • Full functionality
    • No usage limits
    • Community support

ESLint

Free

No published plan breakdown. See the ESLint review.

Which should you pick?

Choose Authelia if

  • You need reverse proxy integration.
  • You want to start without paying.
  • You work on Docker, Kubernetes, Linux, Self-hosted.
  • You also want two-factor authentication.
Authelia review

Choose ESLint if

  • You want to start without paying.
  • You work on Browser-based JavaScript, Node.js, Any JavaScript environment.
ESLint review

Questions people ask

Is Authelia or ESLint better?
Neither clearly leads. Authelia starts at Free and ESLint at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Authelia or ESLint?
Authelia starts at Free and ESLint at Free.
Does Authelia or ESLint run on more platforms?
Authelia runs on Docker, Kubernetes, Linux, Self-hosted. ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment.
Can I use Authelia for free?
Both have a free tier, so you can try either at no cost before committing.
What is Authelia best used for?
Authelia is most often used for putting a login and 2fa in front of self-hosted services that have none, adding sso across a small set of internal tools without a full identity platform, home and small-team infrastructure behind a single reverse proxy. Of those, putting a login and 2fa in front of self-hosted services that have none and adding sso across a small set of internal tools without a full identity platform are not what ESLint is typically brought in for.
What can Authelia do that ESLint cannot?
Authelia covers Reverse proxy integration, Two-factor authentication, Access control rules, Lightweight backends.

Answered from the vendors’ own pages

Authelia: Is Authelia free?

Yes, open source with no licence fee.

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.

Source
Authelia: Does Authelia need a reverse proxy?

Yes. It integrates through forward authentication with Nginx, Traefik, Caddy or HAProxy rather than sitting in front of traffic itself.

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.

Source
Authelia: Authelia or Keycloak?

Authelia is far lighter and aimed at protecting self-hosted services behind a proxy. Keycloak is a full identity and access management platform, and much more to run.

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.

Source
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