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Best Ruby Static Analysis Tools in 2026

  1. 1

    DeepSource

    Free plan APILinuxMac+3

    DeepSource combines pull request review with security scans and code-coverage thresholds. Compare the free tier’s monthly allowances with your review volume, and note the annual billing on Team.

    7.5 Free plan · paid from $24/user/mo (annual) · 14-day trial Visit site
  2. 2

    Brakeman

    Free plan LinuxSelf-hosted

    Brakeman focuses on security analysis for Rails code and offers multiple ways to install, report results, and automate scans.

    7.4 Visit site
  3. 3

    bundler-audit

    Free plan LinuxMac

    bundler-audit focuses on lockfile checks for Ruby and Bundler projects, with offline use, advisory controls and Rake tasks.

    7.4 Open source Visit site
  4. 4

    GitHub CodeQL

    Free plan ExtensionLinuxMac+3
    7.4 Free plan · paid from $30/mo Visit site
  5. 5

    Codacy

    Free plan ExtensionWeb

    Codacy brings code review, security scanning, and coding standards into a cloud platform for engineering teams.

    7.3 Free plan · paid from $18/user/mo (annual) · 14-day trial Visit site
  6. 6

    Dawnscanner

    Free plan LinuxSelf-hosted

    Dawnscanner combines framework-aware Ruby checks with view-code analysis and mitigation guidance. Its text-only results and separate knowledge-base download are worth considering before adopting it.

    7.3 Open source Visit site
  7. 7

    Qlty Cloud

    Free plan APIExtensionLinux+3

    Qlty Cloud combines code analysis, pull-request feedback, and coverage workflows. Compare the monthly analysis and autofix allowances with your team's usage before choosing a plan.

    7.3 Free plan · paid from $20/mo Visit site
  8. 8

    Semgrep Supply Chain

    Free plan APILinuxMac+2

    Semgrep Supply Chain combines dependency security, reachability analysis, malware detection, and upgrade workflows in one service.

    7.1 Free plan · paid from $30/mo Visit site
  9. 9

    RuboCop

    Free plan LinuxSelf-hosted

    RuboCop provides configurable Ruby linting, formatting, editor integration, and CI reporting at no cost. Its plugin and autocorrection options support both new projects and legacy codebases.

    6.9 Open source Visit site
  10. 10

    Reek

    Free plan Linux

    Reek provides configurable Ruby smell detection with several output formats and integrations.

    6.8 Open source Visit site
  11. 11

    Flay

    Free plan LinuxMacWindows
    6.2 Free plan Visit site
  12. 12

    Rails Best Practices

    Free plan LinuxMacWindows
    6.0 Free plan Visit site
  13. 13

    RubyCritic

    Free plan LinuxMacWindows
    5.9 Free plan Visit site
  14. 14

    ERB Lint

    Free plan
    5.8 Free plan Visit site
  15. 15

    Flog

    Free plan
    5.7 Free plan Visit site
  16. 16

    Snyk Code

    Free plan Web
    5.7 Free plan · paid from $25/mo Visit site
  17. 17

    Steep

    Free plan LinuxMacWindows
    5.7 Free plan Visit site
  18. 18

    Sorbet

    Free plan LinuxMac
    5.6 Free plan Visit site
  19. 19

    Slim-Lint

    Free plan
    5.4 Free plan Visit site
  20. 20

    TypeProf

    Free plan
    5.2 Free plan Visit site
  21. 21

    OpenText Fortify SAST

    Paid LinuxMacWeb+1

    Choose OpenText Fortify SAST if your team needs static analysis across source code, bytecode, or binaries, with development workflow support and custom rules.

    4.8 Pricing on request Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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