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Qlty

Qlty is a code quality platform and source-available CLI (Business Source License 1.1) that runs 70+ linters, formatters and security tools across 40+ languages, with cloud coverage and maintainability tracking.

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Introduction

Qlty CLI is a multi-language code quality tool for linting, auto-formatting, maintainability and security. The README says it supports more than 70 static analysis tools for over 40 languages and technologies, giving polyglot teams fast, consistent checks from one command.

The CLI downloads and runs each underlying tool in a managed way, caches results, and can check only changed lines. It adds its own maintainability analysis, such as duplication and complexity smells. Qlty Cloud, the hosted service from the team behind Code Climate Quality, adds code coverage tracking, quality metrics over time and pull request comments.

The CLI is source-available under the Business Source License 1.1 rather than an OSI-approved licence. In the quality loop Qlty is a release gate for code health and coverage.

The source code is at qltysh/qlty on GitHub under the Business Source License 1.1 licence, with about 3,200 stars; the most recent commit was on 9 November 2026.

Features

  1. Unified CLI: One command for 70+ tools.
  2. Changed-lines mode: Check only what changed.
  3. Auto-format: Run formatters consistently.
  4. Maintainability smells: Duplication and complexity checks.
  5. Coverage tracking: Upload coverage to Qlty Cloud.
  6. Git hooks and CI: Pre-commit and pipeline integration.

Pros

  1. Polyglot consistency: Same experience across languages.
  2. Free to use: Open source under the Business Source License 1.1 licence, so the core tool costs nothing to use.
  3. Actively maintained: The repository had commits as recent as 9 November 2026.
  4. Community: About 3,200 GitHub stars.

Cons

  1. BSL licence: Source-available, not OSI open source.
  2. Cloud for history: Trends and coverage need the hosted service.
  3. Young CLI: Rapid releases mean frequent changes.
curl https://qlty.sh | sh
qlty init
qlty check --all
qlty fmt

Resources:

Pricing

The Qlty CLI is free to use under the Business Source License 1.1. Qlty Cloud offers free and paid plans; see qlty.sh for current pricing.

  1. Polyglot teams consolidating linters.
  2. Former Code Climate users looking for its successor.

Conclusion

Qlty brings many linters under one fast CLI with maintainability insights on top.

Check the BSL terms and Qlty Cloud pricing before standardising on it.

On CheckOps, Qlty is filed under the Release & CI gates stage. Related tools listed here include SonarQube, MegaLinter, Super-Linter, Codacy, DeepSource and reviewdog. Which one fits best depends mostly on your stack, your team’s size and skills, and whether you prefer to run tools yourself or pay for a managed service. This page reflects the official website, documentation and repository as they stood on 11 November 2026.

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Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Qlty side by side.