A Ruby static code analyzer, based on the community Ruby style guide.

A static analysis security vulnerability scanner for Ruby on Rails applications.

A fast, powerful type checker designed for Ruby.

Flay analyzes code for structural similarities.

Flog reports the most tortured code in an easy to read pain report. The higher the score, the more pain the code is in.

Code smell detector for Ruby.

Code quality threshold checking as part of your build.

A static analysis security scanner for ruby written web applications. It supports Sinatra, Padrino and Ruby on Rails frameworks.

Ruby classes interactive dependency graph generator.

A Ruby code quality reporter.

Audit Gemfile.lock for gems with security vulnerabilities reported in Ruby Advisory Database.

Static analysis and style linter for Ruby code.

A Project to give the churn file, class, and method for a project for a given checkin. Over time the tool adds up the history of churns to give the number of times a file, class, or method is changing during the life of a project.

Lint your ERB or HTML files

Common Ruby idioms checker.

A tool for measuring code complexity in Ruby class files. Its analysis generates scores based on cyclomatic complexity algorithms with no added "opinions".

A normaliser/beautifier for HTML that also understands embedded Ruby. Ideal for tidying up Rails templates.

MetricFu is a set of tools to provide reports that show which parts of your code might need extra work.

Static analysis Lint-type tool to improve your OO Ruby code.

Runs quality checks on your code using community tools, and makes sure your numbers don't get any worse over time.

Pattern Based Checking Tool for Ruby.

An open source static analysis security vulnerability scanner for Ruby on Rails applications.

A code metric tool for Rails projects

Roodi stands for Ruby Object Oriented Design Inferometer. It parses your Ruby code and warns you about design issues you have based on the checks that it has configured.

Static code analysis for Ruby.

An opinionated ruby formatter, intended to be used via the command line as a text-editor plugin, to autoformat files on save or on demand.

A Ruby cyclomatic complexity analyzer.

Static analysis tool for checking Ruby code for Sandi Metz' rules.

Ruby Style Guide, with linter & automatic code fixer

Gradual Typing for Ruby.

A Ruby gem that helps you refactor your legacy code by the result of some old behavior with a new version.

Mega-Linter can handle any type of project thanks to its 70+ embedded Linters, its advanced reporting, runnable on any CI system or locally, with assisted installation and configuration, able to apply formatting and fixes

A fast, open-source, static analysis tool for finding bugs and enforcing code standards at editor, commit, and CI time. Its rules look like the code you already write; no abstract syntax trees or regex wrestling. Supports 17+ languages.

SonarQube empowers development teams with a code quality and security solution that deeply integrates into your enterprise environment; enabling you to deploy clean code consistently and reliably. SonarQube provides a free and open source Community Edition.

Open-Source static code analysis tool to discover, filter and prioritize security risks and vulnerabilities leading to sensitive data exposures (PII, PHI, PD). Highly configurable and easily extensible, built for security and engineering teams.

Reports known vulnerabilities in common dependencies and recommends updated packages to minimize breaking changes

Vulnerability Scanner and Risk Evaluation for containers, serverless and hosts at runtime. ThreatMapper generates runtime BOMs from dependencies and operating system packages, matches against multiple threat feeds, scans for unprotected secrets, and scores issues based on severity and risk-of-exploit.

CodeScene is a quality visualization tool for software. Prioritize technical debt, detect delivery risks, and measure organizational aspects. Fully automated.

Modern repositories include many technologies, each with its own set of linters. With 30+ linters and counting, Trunk makes it dead-simple to identify, install, configure, and run the right linters, static analyzers, and formatters for all your repos.

In-depth static analysis to find issues in verticals of bug risks, security, anti-patterns, performance, documentation and style. Native integrations with GitHub, GitLab and Bitbucket. Less than 5% false positives.

Better Code Hub checks your GitHub codebase against 10 engineering guidelines devised by the authority in software quality, Software Improvement Group.

Statically generates a call graph image and displays it on screen.

Code Analysis to ship Better Code, Faster.

Automated code review tool integrates with GitHub, Bitbucket and GitLab (even self-hosted). Available for JavaScript, TypeScript, Python, Ruby, Go, PHP, Java, Docker, and more. (open-source free)

Commercial Static Code Analysis which doesn't require pre-compilation.

Beautify HTML, CSS, JavaScript, PHP, Python, Ruby, Java, C, C++, C#, Objective-C, CoffeeScript, TypeScript, Coldfusion, SQL, and more in Atom editor.

Automated Code Reviews and Technical Debt management platform that supports 12+ languages.

A Simple and Comprehensive Vulnerability Scanner for Containers and other Artifacts, Suitable for CI. Trivy detects vulnerabilities of OS packages (Alpine, RHEL, CentOS, etc.) and application dependencies (Bundler, Composer, npm, yarn, etc.). Checks containers and filesystems.

Lizard is an extensible Cyclomatic Complexity Analyzer for many programming languages including C/C++ (doesn't require all the header files or Java imports). It also does copy-paste detection (code clone detection/code duplicate detection) and many other forms of static code analysis. Counts lines of code without comments, CCN (cyclomatic complexity number), token count of functions, parameter count of functions.

A proprietary code quality checker that can be integrated with GitHub.

A commercial static analysis platform that allows for scanning of multiple languages (C/C++, Android, C#, Java, JS, PHP, Python, Node.JS, Ruby, Fortran, and Swift).

Betterscan.io - Betterscan.io checks your code and infra (various Git repositories supported, cloud stacks, CLI, Web Interface platform, integrationss available) for security and quality issues. Code Scanning/SAST/Linting using many tools/Scanners deduplicated with One Report (AI optional). Free to use in noncommerical way, commercial requires license.

A commercial static analysis platform that supports the scanning of C/C++, C#, VB.NET, VB6, ABAP/BSP, ActionScript, Apex, ASP.NET, Classic ASP, VB Script, Cobol, ColdFusion, HTML, Java, JS, JSP, MXML/Flex, Objective-C, PHP, PL/SQL, T-SQL, Python (2.6, 2.7), Ruby (1.9.3), Swift, Scala, VB, and XML.

Comments on style violations in GitHub pull requests. Supports Coffeescript, Go, HAML, JavaScript, Ruby, SCSS and Swift.

Comment on commits coming into your repository and check for syntactic errors and general lint warnings.

Snyk Code finds security vulnerabilities based on AI. Its speed of analysis allow us to analyse your code in real time and deliver results when you hit the save button in your IDE. Supported languages are Java, JavaScript, Python, PHP, C#, Go and TypeScript. Integrations with GitHub, BitBucket and Gitlab. It is free to try and part of the Snyk platform also covering SCA, containers and IaC.

SonarCloud enables your team to deliver clean code consistently and efficiently with a code review tool that easily integrates into the cloud DevOps platforms and extend your CI/CD workflow. SonarCloud is free for open source projects.

Creates reports of over 400 rule patterns for feature detection (e.g. the use of cryptography or version control in apps).

A linter and formatter to help you to improve copywriting, correct spaces, words, punctuations between CJK (Chinese, Japanese, Korean).

Automated Code Analysis for repos on GitHub or BitBucket.

Automated code analysis tool to deal with technical depth. Integrates with Bitbucket and Gitlab. (free for Open Source Projects)

A multi-language static analyzer for C/C++/Obj-C/Python/Ruby to create a graph (in dot or graphml format) which shows all #include relations of a given set of files.

Quickly find and remediate high-priority security issues. Semgrep Supply Chain prioritizes the 2% of vulnerabilities that are reachable from your code.

Sigrid helps you to improve your software by measuring your system's code quality, and then compares the results against a benchmark of thousands of industry systems to give you concrete advice on areas where you can improve.

Combination of multiple linters to install as a GitHub Action.

Grep rough audit - source code auditing tool.

Quick automated code review of your changes. Supports more than 40 runners for various languages, including Clang, Elixir, JavaScript, PHP, Ruby and more.

SonarLint is a free IDE extension available for IntelliJ, VS Code, Visual Studio, and Eclipse, to find and fix coding issues in real-time, flagging issues as you code, just like a spell-checker. More than a linter, it also delivers rich contextual guidance to help developers understand why there is an issue, assess the risk, and educate them on how to fix it.

Regex-based static analysis tool for Visual Studio, VS Code, and Sublime Text - C/C++, C#, PHP, ASP, Python, Ruby, Java, and others.

Emerge is a source code and dependency visualizer that can be used to gather insights about source code structure, metrics, dependencies and complexity of software projects. After scanning the source code of a project it provides you an interactive web interface to explore and analyze your project by using graph structures.

Scan is a free open-source DevSecOps platform for detecting security issues in source code and dependencies. It supports a broad range of languages and CI/CD pipelines.