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Software · head to head

PartyKit vs ESLint

PartyKit logo

PartyKit

Software

Platform for building and deploying realtime multiplayer servers on the edge

From
Free
Rated
-
Full reviewWebsite
ESLint logo

ESLint

Software

Find and fix problems in JavaScript code

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: PartyKit documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.; ESLint slow performance on large codebases compared to newer tools like Oxlint and Biome

Where they differ

Only the attributes on which PartyKit and ESLint actually diverge.

Attributes where PartyKit and ESLint differ
AttributePartyKitESLint
Pricing modelfreemiumUnknown
Platformsweb, apiBrowser-based JavaScript, Node.js, Any JavaScript environment
FoundedUnknown2019

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

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 PartyKit

  • Stateful edge servers
  • WebSocket-first API
  • CRDT library compatibility
  • Framework integrations
  • Global edge deployment
  • Custom domains

Only in ESLint

Nothing recorded that PartyKit does not also cover.

What people use each for

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

PartyKit

  • Multiplayer collaborative appsnot ESLint
  • Realtime AI agent backendsnot ESLint
  • Live cursors and presencenot ESLint
  • Collaborative whiteboards and documentsnot ESLint

ESLint

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

Where each one falls short

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

PartyKit

  • Documentation and FAQ material on the marketing site is sparse compared to larger realtime platforms.
  • Commercial free tier requires deploying to the user's own Cloudflare account, adding setup complexity.
  • Storage on the free Individual plan clears every 24 hours, limiting it to prototyping rather than persistent production data.
  • Smaller ecosystem and community than more established realtime infrastructure providers.

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

PartyKit

Free
  • IndividualFree
    • Up to 10 live projects
    • Deploy to the global edge platform
    • Storage clears every 24 hours
  • CommercialFree
    • Unlimited projects
    • Custom domains
    • Runs on your own Cloudflare account; pay only Cloudflare usage

ESLint

Free

No published plan breakdown. See the ESLint review.

Which should you pick?

Choose PartyKit if

  • You need stateful edge servers.
  • You want to start without paying.
  • You work on web, api.
  • You also want websocket-first api.
PartyKit 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 PartyKit or ESLint better?
Neither clearly leads. PartyKit 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, PartyKit or ESLint?
PartyKit starts at Free and ESLint at Free.
Does PartyKit or ESLint run on more platforms?
PartyKit runs on web, api. ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment.
Can I use PartyKit for free?
Both have a free tier, so you can try either at no cost before committing.
What is PartyKit best used for?
PartyKit is most often used for multiplayer collaborative apps, realtime ai agent backends, live cursors and presence, collaborative whiteboards and documents. Of those, multiplayer collaborative apps and realtime ai agent backends are not what ESLint is typically brought in for.
What can PartyKit do that ESLint cannot?
PartyKit covers Stateful edge servers, WebSocket-first API, CRDT library compatibility, Framework integrations.

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.

Source
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
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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