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Best Ruby Static Analysis Tools in 2026

Ruby static analysis tools check Ruby code for concerns such as security analysis and type checking. This list helps developers and teams compare tools before adding checks to a project.

  1. 01 DeepSource

    DeepSource suits software teams that want automated pull-request checks, security scanning, and code coverage controls.

    From $2/mo Free plan Web · Windows · macOS · Linux
    9.3 Visit Specs
  2. 02 GitHub CodeQL
    From $30/mo Free plan Web · Windows · macOS · Linux
    8.5 Visit Specs
  3. 03 Codacy

    Codacy suits engineering teams seeking pull-request review and security scanning in a cloud platform.

    From $1.50/mo Free plan Web · Browser extension
    8.4 Visit Specs
  4. 04 Semgrep Supply Chain
    From $30/mo Free plan Web · macOS · Linux · API
    8.2 Visit Specs
  5. 05 Brakeman
    Free plan Linux · Self-hosted
    8.1 Visit Specs
  6. 06 Reek
    Free plan Linux
    8.1 Visit Specs
  7. 07 bundler-audit
    Free plan macOS · Linux
    7.9 Visit Specs
  8. 08 Qlty Cloud

    It suits software teams that want code and coverage feedback in pull requests, especially teams using GitHub.

    From $20/mo Web · Windows · macOS · Linux
    7.9 Visit Specs
  9. 09 Dawnscanner
    Free plan Linux · Self-hosted
    7.8 Visit Specs
  10. 10 RuboCop
    Free plan Linux · Self-hosted
    7.6 Visit Specs
  11. 11 OpenText Fortify SAST
    Web · Windows · macOS · Linux
    6.1 Visit Specs
  12. 12 Flay
    Windows · macOS · Linux
    6.0 Visit Specs
  13. 13 ERB Lint
    5.7 Visit Specs
  14. 14 Rails Best Practices
    Windows · macOS · Linux
    5.7 Visit Specs
  15. 15 Flog
    5.6 Visit Specs
  16. 16 RubyCritic
    Windows · macOS · Linux
    5.6 Visit Specs
  17. 17 Snyk Code
    Web
    5.4 Visit Specs
  18. 18 Steep
    Windows · macOS · Linux
    5.4 Visit Specs
  19. 19 Sorbet
    macOS · Linux
    5.3 Visit Specs
  20. 20 Slim-Lint
    5.2 Visit Specs
  21. 21 TypeProf
    5.0 Visit Specs
How this list is ordered. Specifiction scores each tool on how fully its maker documents it, whether its prices are published, where the research puts it, the platforms it runs on and whether it can be tried for free (how we rank). Makers can also buy a numbered place (how Specifiction is paid for).

Before choosing, compare the free plan, paid-from price, trial terms, automated fixes, custom rules, hosted or self-hosted use, and supported platforms.

Compare DeepSource and GitHub CodeQL Get a place on this list

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