Qlty (formerly Code Climate Quality) alternatives
7 other tools do this job. Which one is right depends on why Qlty (formerly Code Climate Quality) is not working for you — so start from the reason, not the list.
Why teams leave Qlty (formerly Code Climate Quality)
- Letter grades oversimplify and can drive the wrong behaviour.
- The Code Climate to Qlty transition means older documentation, URLs and integration guides still say Code Climate.
- Velocity, the companion engineering-metrics product, was sunset — do not buy expecting it.
Worth saying: Qlty (formerly Code Climate Quality) is genuinely strong at this — maintainability grading is easy to communicate to non-engineers. If that is the part you rely on, switching may cost more than it saves.
If cost is the problem
Free tools and lower starting prices on the same billing unit. Usage, plan limits and maintenance can change the total cost.
ESLint
Code Quality
The JavaScript and TypeScript linter every project ends up using.
Ruff
Code Quality
Extremely fast Python linter and formatter that replaces most of the toolchain.
Biome
Code Quality
Rust-based linter and formatter that replaces ESLint and Prettier, very fast.
If you need open source
Qlty (formerly Code Climate Quality) is proprietary; these are not.
SonarQube
Code Quality
The static-analysis standard: 30+ languages, quality gates, clean-as-you-code.
ESLint
Code Quality
The JavaScript and TypeScript linter every project ends up using.
Ruff
Code Quality
Extremely fast Python linter and formatter that replaces most of the toolchain.
Biome
Code Quality
Rust-based linter and formatter that replaces ESLint and Prettier, very fast.
If it has to run on your own infrastructure
Qlty (formerly Code Climate Quality) is cloud-only; these can be self-hosted.
SonarQube
Code Quality
The static-analysis standard: 30+ languages, quality gates, clean-as-you-code.
Codacy
Code Quality
Automated code review with security scanning and coverage in the pull request.
DeepSource
Code Quality
Static analysis with autofix, tuned hard for low false-positive rates.
ESLint
Code Quality
The JavaScript and TypeScript linter every project ends up using.
Everything else in Code Quality
Ranked by how widely adopted they are. Compare any two to see the differences that matter.
The static-analysis standard: 30+ languages, quality gates, clean-as-you-code.
Automated code review with security scanning and coverage in the pull request.
Static analysis with autofix, tuned hard for low false-positive rates.
The JavaScript and TypeScript linter every project ends up using.
Extremely fast Python linter and formatter that replaces most of the toolchain.
Rust-based linter and formatter that replaces ESLint and Prettier, very fast.
JetBrains' IDE inspections, running as a CI quality gate.
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