Is ESLint or Heroku better?

Neither clearly leads. ESLint starts at Free and Heroku at $5/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, ESLint or Heroku?

ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and $5/month for Heroku.

Does ESLint or Heroku run on more platforms?

ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. Heroku runs on Web, Api, Workers.

Can I use ESLint for free?

Yes. ESLint has a free tier, so you can try it without paying. Heroku starts at $5/month.

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 Heroku is typically brought in for.

What can ESLint do that Heroku cannot?

Heroku covers Git-based deployment, Buildpacks, Dynos (containers), Add-ons marketplace.

Developer Tools · head to head

ESLint vs Heroku

ESLint

Developer Tools

Find and fix problems in JavaScript code

From: Free
Free plan: Yes

Full review Website

Heroku

Cloud

Cloud Application Platform

From: $5/month
Free plan: No

Full review Website

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; Heroku there is no free dyno tier; the cheapest Eco dyno is $5 per month
Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which ESLint and Heroku actually diverge.

Attributes where ESLint and Heroku differ
Attribute	ESLint	Heroku
Starting price	Free	$5/month
Pricing model	Unknown	subscription
Free tier	Yes	No
Platforms	Browser-based JavaScript, Node.js, Any JavaScript environment	Web, Api, Workers
Category	Developer Tools	Cloud
Founded	2019	2007

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 Heroku does not also cover.

Only in Heroku

Git-based deployment
Buildpacks
Dynos (containers)
Add-ons marketplace
Postgres database
Environment variables
Logging
API

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 Heroku
Automatically fixing issues with syntax-aware rewritesnot Heroku
Enforcing a consistent code style across a teamnot Heroku
Running as a CI step to block non-conforming codenot Heroku
Writing custom rules for project-specific conventionsnot Heroku

Heroku

Application hostingnot ESLint
Database as a servicenot ESLint
CI/CD pipelinesnot ESLint
API deploymentnot 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

Heroku

There is no free dyno tier; the cheapest Eco dyno is $5 per month
Eco dynos sleep after 30 minutes of inactivity, are restricted to personal accounts and allow only 2 process types
Free SSL and 10 process types start at the Basic dyno at $7 per month
Private and Shield dyno types require a Private Space, which is billed on top of the dynos
Private Space dynos start at $250 per month for Private-M and $500 per month for Private-L
Dyno prices are per dyno per month, so an app with several process types multiplies the bill

Pricing, plan by plan

ESLint

Free

No published plan breakdown. See the ESLint review.

Heroku

$5/month

Eco Dyno$5/month
- 0.5 GB RAM
- Git/Docker deploy
- Custom domains
Basic Dyno$7/month
- 0.5 GB RAM
- Always-on
- Free SSL
Standard-1X Dyno$25/month
- 0.5 GB RAM
- Horizontal scaling
- App metrics
Standard-2X Dyno$50/month
- 1 GB RAM
- Horizontal scaling
- App metrics

Which should you pick?

Choose ESLint if

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

ESLint review

Choose Heroku if

You need git-based deployment.
You work on Web, Api, Workers.
You also want buildpacks.

Heroku review

Questions people ask

Is ESLint or Heroku better?: Neither clearly leads. ESLint starts at Free and Heroku at $5/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ESLint or Heroku?: ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and $5/month for Heroku.
Does ESLint or Heroku run on more platforms?: ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. Heroku runs on Web, Api, Workers.
Can I use ESLint for free?: Yes. ESLint has a free tier, so you can try it without paying. Heroku starts at $5/month.
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 Heroku is typically brought in for.
What can ESLint do that Heroku cannot?: Heroku covers Git-based deployment, Buildpacks, Dynos (containers), Add-ons marketplace.

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

Heroku: How much does Heroku cost?

Heroku dyno pricing starts at $5 per month USD for the Eco tier (with 30-minute inactivity sleep), $7 per month for Basic (always-on), and scales up to $1,500 per month for Performance-2XL with 126 GB RAM.

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

Heroku: What is the cheapest always-on Heroku plan?

The Basic Dyno at $7 per month USD is Heroku's cheapest always-on container option. It provides 0.5 GB RAM, free SSL, and support for 10 process types.

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

Heroku: How is Heroku Postgres priced?

Heroku Postgres Essential tier (shared resources) starts at $5-$20 per month for 1-32 GB disk. Standard tier (dedicated) ranges $50-$12,000 per month. Premium, Private, Shield, and Advanced tiers offer higher performance at corresponding prices.

Source

ESLint vs Heroku

ESLint

Heroku

The short version

Where they differ

What each one covers

Only in ESLint

Only in Heroku

What people use each for

ESLint

Heroku

Where each one falls short

ESLint

Heroku

Pricing, plan by plan

ESLint

Heroku

Which should you pick?

Choose ESLint if

Choose Heroku if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on ESLint

More on Heroku

Keep looking

Other head to heads