XO vs ESLint

Side-by-side — pricing, strengths, tradeoffs, and fit.

XO

Enforce strict JavaScript happiness style code formatting.

ESLint

Pluggable linting utility for JavaScript.

At a glance

Open SourceFree Tier
● Established·From $0
Open SourceFree Tier
● Established·From $0

Overview

One-liner

Enforce strict JavaScript happiness style code formatting.

One-liner

Pluggable linting utility for JavaScript.

Maturity

Established

Maturity

Established

Open source

✓ Yes

Open source

✓ Yes

Pricing

Free tier

✓ Available

Open source — free to use

Free tier

✓ Available

Open source — free to use

Starts at

$0

Starts at

$0

Model

Flat rate

Model

Flat rate

Enterprise

✕ None

Enterprise

✕ None

Best for

✓ Best for

JavaScript developers who need to enforce a consistent coding standard.
Teams working on large-scale projects where uniformity is crucial for maintainability.

✓ Best for

Teams working on large JavaScript projects who need strict coding standards.
Projects that require integration with multiple development environments or editors.
Developers looking for a customizable linting solution.

Not ideal for

✕ Not for

Projects that require support for multiple programming languages beyond JavaScript.
Developers looking for real-time code style enforcement within an IDE without additional setup.

✕ Not for

Small projects where the overhead of configuration outweighs benefits.
Scenarios requiring real-time code analysis in cloud-based IDEs (ESLint is primarily local).

Strengths

↑ Strengths

Enforces the JavaScript happiness style for consistent code formatting.
Integrates with various editors and build systems via plugins.
Provides a simple command-line interface for easy use.

↑ Strengths

Extensive rule set for identifying problematic patterns in code.
Highly configurable to fit team-specific coding standards.
Supports plugins and custom rules.
Integrates with various editors and build systems.

Weaknesses

↓ Weaknesses

Limited support for non-JavaScript languages
Configuration complexity can be overwhelming
Performance issues with large codebases
Documentation lacks depth for advanced use cases

↓ Weaknesses

Steep learning curve for new users
Performance overhead in large projects
Complex configuration management
Dependency on plugins for advanced features
Full XO profile →Full ESLint profile →