The Best Ruby Static Analysis Tools in 2026

• 21 tools ranked
• Updated Sep 2026
• Researched from official sources
• Compare tools in this directory

We researched Ruby static analysis tools using information on their official websites, including pricing pages, plan tables, and product documentation. Rankings focus on how well each product analyzes Ruby code, value for money, and features verified in vendor materials, helping teams compare options for code quality, security, and type checking.

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

The full ranking 21 tools, best first

1. 1
   OF
   OpenText Fortify SAST —not yet scored

   Best forEnterprises needing comprehensive SAST

   Broad code analysis and workflow integrations for teams with enterprise SAST needs.

   • Automated fixes
   • Custom rules

   Pricing on request Our OpenText Fortify SAST verdict → + Compare Visit OpenTextFor vendors Sponsor this spot · #1 · $149/mo →
   —not yet scored

   Visit OpenText
2. 2
   
   Snyk Code 6.3

   Best forTeams prioritizing Ruby application security

   Security-focused code scanning with IDE, pull-request, and CI/CD workflows.

   • Automated fixes
   • Custom rules

   Free plan · paid from $25/mo Our Snyk Code verdict → + Compare Visit Snyk CodeFor vendors Sponsor this spot · #2 · $99/mo →
   6.3/10★★★☆☆

   Visit Snyk Code
3. 3
   
   GitHub CodeQL 6.3

   Best forGitHub-centric teams needing semantic security analysis

   Semantic queries and pull-request alerts for teams working in GitHub-centered workflows.

   • Automated fixes
   • Custom rules

   Free plan · paid from $30/mo Our GitHub CodeQL verdict → + Compare Visit GitHub CodeQLFor vendors Sponsor this spot · #3 · $79/mo →
   6.3/10★★★☆☆

   Visit GitHub CodeQL
4. 4
   
   Codacy 7.3

   Best forTeams seeking broad code quality and security checks

   Broad code and security checks, with pull-request controls and a free plan.

   • Security analysis
   • Custom rules

   Free plan · paid from $18/user/mo (annual) · 14-day trial Our Codacy verdict → + Compare Visit CodacyFor vendors Sponsor this spot · #4 · $69/mo →
   7.3/10★★★★☆

   Visit Codacy
5. 5
   
   DeepSource 6.0

   Best forTeams combining code review, security, and dependencies

   A Ruby-capable analysis platform combining pull-request checks, security, and dependency review.

   Free plan · paid from $24/user/mo (annual) · 14-day trial Our DeepSource verdict → + Compare Visit DeepSourceFor vendors Sponsor this spot · #5 · $59/mo →
   6.0/10★★★☆☆

   Visit DeepSource
6. 6
   SA
   Semgrep Assistant 5.3

   Best forTeams wanting configurable security rules and AI triage

   Semgrep pairs code scanning with AI triage, but Ruby-specific support is unclear.

   • Security analysis
   • Custom rules

   Free plan Our Semgrep Assistant verdict → + Compare Visit Semgrep
   5.3/10★★★☆☆

   Visit Semgrep
7. 7
   
   RuboCop —not yet scored

   Best forRuby teams wanting an open-source linter

   A configurable Ruby linter with formatting, security checks, and CI/editor support.

   • Automated fixes
   • Custom rules

   Open source Our RuboCop verdict → + Compare Visit RuboCop
   —not yet scored

   Visit RuboCop
8. 8
   
   Qlty Cloud 5.0

   Best forTeams wanting broad quality checks with a free tier

   A broad cloud analysis suite with a useful free tier and paid team controls.

   Free plan · paid from $20/mo Our Qlty Cloud verdict → + Compare Visit Qlty Cloud
   5.0/10★★☆☆☆

   Visit Qlty Cloud
9. 9
   
   Brakeman —not yet scored

   Best forRails teams focused on application security

   A Rails-focused security scanner with configurable checks and CI integrations.

   • Custom rules

   Our Brakeman verdict → + Compare Visit Brakeman
   —not yet scored

   Visit Brakeman
10. 10
    R
    Reek —not yet scored

    Best forRuby teams focused on code-smell detection

    Ruby-focused smell detection with configurable rules and extensive editor and CI integrations.

    Open source Our Reek verdict → + Compare Visit Reek
    —not yet scored

    Visit Reek
11. 11
    D
    Dawnscanner —not yet scored

    Best forSmall Ruby apps needing free security scanning

    Local Ruby scanning with dependency checks and mitigation guidance, but no IDE or CI/CD support.

    Open source Our Dawnscanner verdict → + Compare Visit Dawnscanner
    —not yet scored

    Visit Dawnscanner
12. 12
    S
    Sorbet —not yet scored

    Best forRuby teams adopting gradual static typing

    Sorbet adds gradual static type checking and editor support to Ruby projects.

    • Type checking
    • Self-hosted option

    Free plan Our Sorbet verdict → + Compare Visit Sorbet
    —not yet scored

    Visit Sorbet
13. 13
    S
    Steep —not yet scored

    Best forTeams using RBS signatures for Ruby type checks

    A focused, open-source Ruby type checker for teams working with RBS.

    • Type checking
    • Self-hosted option

    Free plan Our Steep verdict → + Compare Visit Steep
    —not yet scored

    Visit Steep
14. 14
    R
    RubyCritic —not yet scored

    Best forRuby teams wanting combined code-smell reports

    Combines Reek, Flay, and Flog into configurable reports for Ruby projects.

    • Self-hosted option
    • Custom rules

    Free plan Our RubyCritic verdict → + Compare Visit RubyCritic
    —not yet scored

    Visit RubyCritic
15. 15
    RB
    Rails Best Practices —not yet scored

    Best forRails teams checking common code practices

    A free, open-source Rails analyzer for configurable code-practice checks and reports.

    • Self-hosted option
    • Custom rules

    Free plan Our Rails Best Practices verdict → + Compare Visit site
    —not yet scored

    Visit site
16. 16
    BA
    bundler-audit —not yet scored

    Best forRuby teams auditing vulnerable gem dependencies

    A focused, open-source CLI for auditing vulnerable gems and insecure sources in Bundler lockfiles.

    Open source Our bundler-audit verdict → + Compare Visit RubySec
    —not yet scored

    Visit RubySec
17. 17
    EL
    ERB Lint —not yet scored

    Best forTeams linting ERB templates and embedded Ruby

    A free, self-hosted command-line linter focused on ERB and HTML templates.

    • Security analysis
    • Automated fixes
    • Self-hosted option

    Free plan Our ERB Lint verdict → + Compare Visit ERB Lint
    —not yet scored

    Visit ERB Lint
18. 18
    F
    Flay —not yet scored

    Best forRuby teams measuring duplicated code

    A focused, open-source Ruby tool for locating duplicated code across files.

    • Self-hosted option

    Free plan Our Flay verdict → + Compare Visit Flay
    —not yet scored

    Visit Flay
19. 19
    F
    Flog —not yet scored

    Best forRuby teams measuring method and class complexity

    An open-source Ruby tool for scoring method and class complexity locally.

    • Self-hosted option

    Free plan Our Flog verdict → + Compare Visit Flog
    —not yet scored

    Visit Flog
20. 20
    SL
    Slim-Lint —not yet scored

    Best forTeams linting Slim templates in CI

    Configurable command-line linting for Slim templates, with local and CI workflows.

    • Self-hosted option
    • Custom rules

    Free plan Our Slim-Lint verdict → + Compare Visit Slim-Lint
    —not yet scored

    Visit Slim-Lint
21. 21
    T
    TypeProf —not yet scored

    Best forRuby 3.3+ developers exploring inferred types

    A focused, open-source Ruby type interpreter for developers evaluating inferred types.

    • Type checking
    • Self-hosted option

    Free plan Our TypeProf verdict → + Compare Visit TypeProf
    —not yet scored

    Visit TypeProf

No tools match those filters.

Compare at a glance

#	Tool	Free plan	Paid from	Security analysis	Type checking	Automated fixes	Custom rules	Score
1	OFOpenText Fortify SAST	—	—	—	—	Yes	Yes	—
2	Snyk Code	Yes	$25/mo	—	—	Yes	Yes	6.3
3	GitHub CodeQL	Yes	$30/mo	—	—	Yes	Yes	6.3
4	Codacy	Yes	—	Yes	—	—	Yes	7.3
5	DeepSource	Yes	—	—	—	—	—	6.0
6	SASemgrep Assistant	Yes	—	Yes	No	—	Yes	5.3
7	RuboCop	—	None	—	—	Yes	Yes	—
8	Qlty Cloud	Yes	$20/mo	—	—	—	—	5.0
9	Brakeman	—	—	—	—	—	Yes	—
10	RReek	—	None	—	—	No	—	—
11	DDawnscanner	—	None	—	—	—	—	—
12	SSorbet	Yes	None	No	Yes	No	No	—
13	SSteep	Yes	None	No	Yes	No	—	—
14	RRubyCritic	Yes	None	No	No	No	Yes	—
15	RBRails Best Practices	Yes	None	No	No	No	Yes	—
16	BAbundler-audit	—	None	—	—	—	—	—
17	ELERB Lint	Yes	None	Yes	—	Yes	Yes	—
18	FFlay	Yes	None	No	No	No	No	—
19	FFlog	Yes	None	No	No	No	—	—
20	SLSlim-Lint	Yes	None	No	No	No	Yes	—
21	TTypeProf	Yes	None	—	Yes	—	—	—

Head-to-head All 21 comparisons →

• OFOpenText Fortify SAST vs Codacy
• OFOpenText Fortify SAST vs DeepSource
• OFSAOpenText Fortify SAST vs Semgrep Assistant
• OFOpenText Fortify SAST vs RuboCop
• OFOpenText Fortify SAST vs Qlty Cloud
• Snyk Code vs DeepSource
• SASnyk Code vs Semgrep Assistant
• Snyk Code vs RuboCop
• Snyk Code vs Qlty Cloud

How we rank ruby static analysis tools

Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026