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Developer Tools · head to head

ESLint vs PlanetScale

ESLint logo

ESLint

Developer Tools

Find and fix problems in JavaScript code

From
Free
Free plan
Yes
Visit ESLintFull review
PlanetScale logo

PlanetScale

Databases

The MySQL-compatible serverless database

From
Free
Free plan
Yes
Visit PlanetScaleFull review

The short version

  • PlanetScale is a MySQL-compatible serverless database platform.
  • ESLint is free; PlanetScale starts at $15/mo.
  • Where ESLint falls short: slow performance on large codebases compared to newer tools like Oxlint and Biome.
  • Where PlanetScale falls short: pricing varies significantly across 17+ AWS and GCP regions.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which ESLint and PlanetScale actually diverge.

Attributes where ESLint and PlanetScale differ
AttributeESLintPlanetScale
PlatformsAPIWeb
CategoryDeveloper ToolsDatabases
Founded20192018

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

Not yet recorded: pricing model for ESLint.

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 PlanetScale does not also cover.

Only in PlanetScale

  • Database Branching
  • Non-blocking Schema Changes
  • Insights
  • Horizontal Scaling
  • Connection Pooling
  • Query Caching
  • Automatic Backups
  • Global Replication

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

PlanetScale

  • MySQL-compatible applications requiring horizontal scalingnot ESLint
  • PostgreSQL deployments with custom cluster configurationsnot ESLint
  • Multi-region database deployments on AWS or GCPnot ESLint
  • Applications requiring transparent sharding via Vitessnot 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

PlanetScale

  • Pricing varies significantly across 17+ AWS and GCP regions
  • Additional costs for EBS storage beyond base tier, backup storage, and egress
  • Dedicated PgBouncer and replicas incur separate charges
  • Metal tier pricing increases sharply with larger configurations

Pricing, plan by plan

ESLint

Free

No published plan breakdown. See the ESLint review.

PlanetScale

Free
  • Postgres EBS Single-Node (ARM64 PS-5)$5/mo
    • 512 MiB RAM
    • Single-node configuration
    • EBS storage included
  • Postgres EBS HA (ARM64 PS-5)$15/mo
    • 512 MiB RAM
    • 3-node high-availability setup
    • 1 primary + 2 replicas
  • Postgres Metal (M-10)$50/mo
    • 1/8 vCPU, 1 GiB RAM
    • 3-node HA configuration
    • 10 GiB NVMe storage included
  • Vitess Non-Metal 3-Node$39/mo
    • Sharding-capable database
    • x86-64 architecture
    • 3-node configuration

Which should you pick?

Choose ESLint if

  • You want to start without paying.
  • You work on API.
ESLint review

Choose PlanetScale if

  • You need database branching.
  • You want to start without paying.
  • You also want non-blocking schema changes.
PlanetScale review

Questions people ask

Is ESLint or PlanetScale better?
Neither clearly leads. ESLint starts at Free and PlanetScale at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ESLint or PlanetScale?
ESLint starts at Free and PlanetScale at Free.
Does ESLint or PlanetScale run on more platforms?
ESLint runs on API. PlanetScale runs on Web.
Can I use ESLint for free?
Both have a free tier, so you can try either at no cost before committing.
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 PlanetScale is typically brought in for.
What can ESLint do that PlanetScale cannot?
PlanetScale covers Database Branching, Non-blocking Schema Changes, Insights, Horizontal Scaling.

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
PlanetScale: How much does a PlanetScale Postgres database cost per month?

PlanetScale Postgres pricing starts at $5/month for single-node ARM64 configurations with 512 MiB RAM and $15/month for the same specs in high-availability mode with 1 primary and 2 replicas. Metal tier starts at $50/month for M-10 configuration (1/8 vCPU, 1 GiB RAM). Exact pricing depends on cluster size, node architecture (ARM64 vs x86-64), storage configuration, and selected AWS/GCP region.

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
PlanetScale: Is there a free tier for PlanetScale?

PlanetScale offers a free tier for development and testing workloads. After free tier limits are reached, usage-based pricing applies starting at $5/month for the smallest Postgres single-node configuration, with costs scaling based on cluster size, compute, storage, and additional features like dedicated PgBouncer or replicas.

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
PlanetScale: What is the difference between PlanetScale ARM64 and x86-64 pricing?

ARM64 instances cost significantly less than x86-64 equivalents. For example, a Postgres EBS HA cluster with 512 MiB RAM costs $15/month on ARM64 but $39/month on x86-64. This pricing difference extends across all cluster sizes, with larger x86-64 configurations reaching up to $5,599/month compared to ARM64 alternatives.

Source
PlanetScale: What is included in a PlanetScale cluster price versus additional costs?

The advertised cluster price covers the base compute and configured storage. Additional charges apply for EBS storage beyond the base allocation, backup storage, data egress, optional dedicated PgBouncer connections, and replicas beyond the base high-availability configuration. Regional pricing varies across 17+ AWS and GCP zones.

Source
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