RuffCheck Python files and folders for common mistakes, with local fixes and CI exit codes.
Free MIT software · local Python checks · no scan allowance or API bill
Developer tools
Biome
Free optionOpen sourceLocal
Lint JavaScript and TypeScript projects locally and use findings as a CI gate.
What you can use it for
Lint JavaScript and TypeScript projects locally and use findings as a CI gate.
- Project-wide linting without buying a workspace scan plan.
- Actionable diagnostics and nonzero exit codes for automated checks.
Workflow coverage and comparison notes
Replace JavaScript/TypeScript project linting and configured CI pass/fail checks. Not Iris scoring, broad security detection, dependency audits or managed cloud history. Free software; hardware and any hosted CI are extra, no paid API needed.
Before you switch
Language support and rules differ from Iris. Replaces JS/TS static linting and configured CI gates, not Iris health scoring, full cross-language analysis, secrets detection, dependency CVE audits, SBOM or hosted audit history. Not a type checker or AI code reviewer; configure the tool and review changes yourself. Your computer and any CI/build hosting cost extra. No paid AI API is required. Verification used JavaScript fixtures, not a TypeScript application or IDE integration.
Alternatives to these paid apps
Each comparison covers the workflow described above, rather than every paid feature.
More for the same workflow
See alternatives →Ruff