Black vs Qlty
On the evidence we track, Black leads this comparison with a composite score of 74/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
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.
Black
LeaderA Python code formatter that automatically reformats entire files to enforce consistent styling. It produces minimal diffs to accelerate code review and ensures uniform appearance across projects.
Qlty
A code quality and coverage platform combining linting, auto-formatting, security scanning, duplication detection, and code coverage analysis with AI-powered fix suggestions, deployed as a cloud service with a local CLI.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Qlty
Free plan available. Pro from $20/contributor/month. Enterprise $30/contributor/month with volume discounts (5% off 100+ seats, 10% off 200+ seats annually).
- FreeFree
- Linting & auto-formatting
- Code coverage
- Maintainability & duplication
- Open, extensible Rust CLI
- Unlimited private/public contributors
- +1 more
- Pro$20/contributor/month
- Everything from Free
- Shared configurations
- Trends & hotspots
- One year of history
- Accelerated analysis
- +10 more
- EnterpriseContact sales
- Everything from Pro
- Advanced analytics
- Organization policies
- Custom permissions
- Audit logs
- +6 more
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.
- Visual Studio Code
- GitHub Actions
Black
Leader- Neovim
- conform.nvim
- ALE
- SublimeText
- Pre-commit
- Jupyter Notebooks
- blacken-docs
- blackdoc
- Vim
Qlty
- GitHub
- CircleCI
- Chrome
- Firefox
Black or Qlty: 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.