Psalm vs Ruff
No clear leader: Ruff (74.0) and Psalm (72.8) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for code quality tools. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
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.
Ruff
A fast Python linter built in Rust that consolidates multiple linting tools into a single interface. It supports over 500 rules, provides automated fixes for common issues, and runs significantly faster than traditional Python linters on even very large codebases.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Psalm
Free and open-source. Optional paid support contracts available.
- Open SourceFree
Ruff
Pricing not documented yet.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Psalm
Not documented yet.
Ruff
- Flake8
- isort
- Autoflake
- Pyflakes
- pycodestyle
- Pylint
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.