Comparison

ESLint vs Psalm

On the evidence we track, Psalm leads this comparison with a composite score of 81/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

ESLint full profile →Psalm full profile →

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Attribute comparison across 2 tools
Attribute	ESLint	PsalmLeader
Vioscale score	72 / 100low · 44%	81 / 100low · 14%
Commits last 30dactivity.commits_last_30d	92	-
Github starsadoption.github_stars	27,432	5,875
Package downloads weeklyadoption.package_downloads_weekly	152,976,775	-
Optionsdeployment.options	{"self_hosted":true}	{"self_hosted":true}
Longdescription.long	ESLint is an open source pluggable linting utility for JavaScript and JSX that statically analyzes code to find problems. Many issues can be automatically fixed, and it integrates with text editors and CI pipelines.	A free and open-source static analysis tool for PHP that identifies type-related bugs and security vulnerabilities in code, with automatic fixing capabilities.
Capabilitiesfeatures.capabilities	{"autofix":true,"function":"linter","ci_gating":true,"deployment":"cli_local","open_source":"oss","config_model":"config_file","custom_rules":true,"impl_language":"JavaScript","pricing_model":"free","language_scope":"single_language","editor_integration":true}	{"autofix":true,"function":"static_analyzer","ci_gating":true,"deployment":"cli_local","open_source":"oss","config_model":"config_file","custom_rules":true,"pricing_model":"free","language_scope":"single_language","editor_integration":true}
Countintegrations.count	1	-
Listintegrations.list	[{"name":"Codemod"}]	-
Primarylanguage.primary	JavaScript	PHP
Spdxlicense.spdx	MIT	MIT
Supportplatform.support	{"cli":true}	{"cli":true}
Pricingpricing	{"type":"open_source","plans":[{"free":true,"name":"Open Source","features":["Find issues in JavaScript code","Automatically fix problems","Custom parsers","Custom rules","Text editor integration","CI pipeline integration"],"description":"Free open source linter","contactSales":false}],"summary":"Free open source","freeTier":true,"sourceUrl":"https://eslint.org","retrievedAt":"2026-08-05T14:08:29.561Z"}	{"type":"open_source","plans":[{"free":true,"name":"Open Source","description":"Free and open-source static analysis tool for PHP","contactSales":false}],"summary":"Free and open-source. Optional paid support contracts available.","freeTier":true,"sourceUrl":"https://psalm.dev/","retrievedAt":"2026-08-03T22:32:46.041Z"}
Free tierpricing.free_tier	Yes	Yes
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	free	free
Transparentpricing.transparent	-	Yes
Cadence daysrelease.cadence_days	13	1

Capabilities

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

Capability comparison for Code Quality Tools
Capability	ESLint	Psalm
Core
Function	Linter	Static analyzer
Language scope	Single-language	Single-language
Implementation language	JavaScript	-
Capability
Autofix	✓	✓
Config
Config model	Config file	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

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