Comparison

ast-grep vs Psalm

No leader: the top candidate Psalm has only 0.33 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

ast-grep full profile →Psalm full profile →

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ast-grep60

Psalm73

Attribute comparison across 2 tools
Attribute	ast-grep	Psalm
Vioscale score	60 / 100low · 45%	73 / 100low · 33%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	free	free
Transparentpricing.transparent	-	✓
Security
Scorecardsecurity.scorecard	-	4.5
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=packagist&package_name=vimeo%2Fpsalm&per_page=100 · Last 12m: 0
Adoption
Dependent reposadoption.dependent_repos	177	15,920
Github starsadoption.github_stars	15,649	5,884
Activity
Commits last 30dactivity.commits_last_30d	49	-
Release
Cadence daysrelease.cadence_days	14	1
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	MIT	MIT
Language
Primarylanguage.primary	Rust	PHP

Score

Vioscale score

ast-grep60 / 100low · 45%

Psalm73 / 100low · 33%

Pricing

Free tier

ast-grep✓

Psalm✓

Model

ast-grepcommercial

Psalmcommercial

Price level

ast-grepfree

Psalmfree

Transparent

ast-grep–

Psalm✓

Security

Scorecard

ast-grep–

Psalm4.5

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

PsalmCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=packagist&package_name=vimeo%2Fpsalm&per_page=100 · Last 12m: 0

Adoption

Dependent repos

ast-grep177

Psalm15,920

Github stars

ast-grep15,649

Psalm5,884

Activity

Commits last 30d

ast-grep49

Psalm–

Release

Cadence days

ast-grep14

Psalm1

History

ast-grep20 items

Psalm20 items

License

Spdx

ast-grepMIT

PsalmMIT

Language

Primary

ast-grepRust

PsalmPHP

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	Psalm
Core
Function	Static analyzer	Static analyzer
Language scope	Multi-language	Single-language
Implementation language	Rust	PHP
Capability
Autofix	✓	✓
Config
Config model	Rule packs	Config file
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

PsalmStatic analyzer

Language scope

ast-grepMulti-language

PsalmSingle-language

Implementation language

ast-grepRust

PsalmPHP

Capability

Autofix

ast-grep✓

Psalm✓

Config

Config model

ast-grepRule packs

PsalmConfig file

Extensibility

Custom rules

ast-grep✓

Psalm✓

Deployment

ast-grepCLI-local

PsalmCLI-local

Delivery

Editor integration

ast-grep✓

Psalm-

CI / VCS gating

ast-grep-

Psalm-

Insight

Code metrics

ast-grep-

Psalm✓

Performance

Incremental / monorepo aware

ast-grep-

Psalm-

Licensing

Open-source

ast-grepOSS

PsalmOSS

Commercial

Pricing model

ast-grepFree

PsalmFree

What each one is

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

ast-grep

A structural code search and rewriting tool that uses AST analysis to locate and modify code patterns across thousands of files, with support for linting and programmatic access via Node.js bindings.

Independently observed

Psalm

Psalm is a free, open-source static analyzer for PHP that identifies type-related errors and bugs in codebases at their strictest settings. It can automatically fix many common issues and supports safe coding patterns used in other languages.

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 sourceFree tier

as of 2026-08-14verify ↗

Psalm

Open sourceFree tier

Free and open-source. Optional paid support contracts available.

Open SourceFree

as of 2026-08-03verify ↗

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	Psalm
CLIPlatforms	✓	✓
Self-hostedDeployment	✓	✓

Platforms

CLI

ast-grep✓

Psalm✓

Deployment

Self-hosted

ast-grep✓

Psalm✓

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