Comparison

ast-grep vs Biome

On the evidence we track, Biome leads this comparison with a composite score of 68/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

ast-grep full profile →Biome full profile →

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ast-grep55

★Biome68

Attribute comparison across 2 tools
Attribute	ast-grep	BiomeLeader
vioscaleAI score	55 / 100low · 35%	68 / 100medium · 68%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	open_source	freemium
Price levelpricing.price_level	free	low
Transparentpricing.transparent	-	✗
Integrations
Countintegrations.count	-	3
Security
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40ast-grep%2Fnapi&per_page=100 · Last 12m: 0	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40biomejs%2Fbiome&per_page=100 · Last 12m: 0
Adoption
Dependent reposadoption.dependent_repos	177	587
Github starsadoption.github_stars	16,225	25,952
Package downloads weeklyadoption.package_downloads_weekly	-	17,944,016
Activity
Commits last 30dactivity.commits_last_30d	33	100
Release
Cadence daysrelease.cadence_days	15	6
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	Apache-2.0
Language
Primarylanguage.primary	Rust	Rust
Market
Availabilitymarket.availability	-	Available worldwide
Content
Faqcontent.faq	5 items	5 items

Score

vioscaleAI score

ast-grep55 / 100low · 35%

Biome68 / 100medium · 68%

Pricing

Free tier

ast-grep✓

Biome✓

Model

ast-grepopen_source

Biomefreemium

Price level

ast-grepfree

Biomelow

Transparent

ast-grep–

Biome✗

Integrations

Count

ast-grep–

Biome3

Security

Vulnerabilities

ast-grepCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40ast-grep%2Fnapi&per_page=100 · Last 12m: 0

BiomeCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40biomejs%2Fbiome&per_page=100 · Last 12m: 0

Adoption

Dependent repos

ast-grep177

Biome587

Github stars

ast-grep16,225

Biome25,952

Package downloads weekly

ast-grep–

Biome17,944,016

Activity

Commits last 30d

ast-grep33

Biome100

Release

Cadence days

ast-grep15

Biome6

History

ast-grep20 items

Biome20 items

License

Spdx

ast-grepMIT

BiomeApache-2.0

Language

Primary

ast-grepRust

BiomeRust

Market

Availability

ast-grep–

BiomeAvailable worldwide

Content

Faq

ast-grep5 items

Biome5 items

Capabilities

Feature-by-feature on the axes that matter for code quality tools. “-” means undocumented, not absent.

Capability comparison for Code Quality Tools
Capability	ast-grep	Biome
Core
Function	Static analyzer	Linter + formatter
Language scope	Multi-language	Multi-language
Implementation language	Rust	Rust
Capability
Autofix	✓	✓
Config
Config model	Rule packs	Zero-config
Extensibility
Custom rules	✓	-
Deployment
Deployment	CLI-local	CLI-local
Delivery
Editor integration	✓	✓
CI / VCS gating	-	✓
Insight
Code metrics	-	-
Performance
Incremental / monorepo aware	-	-
Licensing
Open-source	OSS	OSS
Commercial
Pricing model	Free	Free

Core

Function

ast-grepStatic analyzer

BiomeLinter + formatter

Language scope

ast-grepMulti-language

BiomeMulti-language

Implementation language

ast-grepRust

BiomeRust

Capability

Autofix

ast-grep✓

Biome✓

Config

Config model

ast-grepRule packs

BiomeZero-config

Extensibility

Custom rules

ast-grep✓

Biome-

Deployment

ast-grepCLI-local

BiomeCLI-local

Delivery

Editor integration

ast-grep✓

Biome✓

CI / VCS gating

ast-grep-

Biome✓

Insight

Code metrics

ast-grep-

Biome-

Performance

Incremental / monorepo aware

ast-grep-

Biome-

Licensing

Open-source

ast-grepOSS

BiomeOSS

Commercial

Pricing model

ast-grepFree

BiomeFree

What each one is

The product in its own terms, so the numbers below have context.

ast-grep

Find and modify code patterns using abstract syntax tree analysis. Useful for linting, refactoring, and enforcing coding standards.

Independently observed

Biome

Leader

An all-in-one code formatter and linter built with Rust that can format code, identify issues, and improve code quality with high performance and minimal setup required.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

ast-grep

Open source

Free and open source

as of 2026-10-13verify ↗

Biome

Leader

HybridFree tier

Open source with optional commercial support available

as of 2026-10-14verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	ast-grep	Biome
CLIPlatforms	✓	✓
Self-hostedDeployment	✓	✓

Platforms

CLI

ast-grep✓

Biome✓

Deployment

Self-hosted

ast-grep✓

Biome✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

ast-grep

Not documented yet.

Biome

Leader

3 total

ESLint
TypeScript ESLint
Prettier

Independently observed

Still deciding?

ast-grep or Biome: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.