Code Quality

  • beanstalkapp.com — A complete workflow to write, review, and deploy code), a free account for one user, and one repository with 100 MB of storage
  • browserling.com — Live interactive cross-browser testing, free only 3 minutes sessions with MS IE 9 under Vista at 1024 x 768 resolution
  • codacy.com — Automated code reviews for PHP, Python, Ruby, Java, JavaScript, Scala, CSS, and CoffeeScript, free for unlimited public and private repositories
  • Codeac.io - Automated Infrastructure as Code review tool for DevOps integrates with GitHub, Bitbucket, and GitLab (even self-hosted). In addition to standard languages, it also analyzes Ansible, Terraform, CloudFormation, Kubernetes, and more. (open-source free)
  • CodeBeat — Automated Code Review Platform available for many languages. Free forever for public repositories with Slack and e-mail integration.
  • codeclimate.com — Automated code review, free for Open Source and unlimited organisation-owned private repos (up to 4 collaborators). Also free for students and institutions.
  • codecov.io — Code coverage tool (SaaS), free for Open Source and one free private repo
  • CodeFactor — Automated Code Review for Git. The free version includes unlimited users, public repositories, and one private repo.
  • coderabbit.ai — AI-powered code review tool that integrates with GitHub/GitLab. Free tier includes 200 files/hour, 3 reviews per hour, and 50 conversations/hour. Free forever for open source projects.
  • codescene.io - CodeScene prioritizes technical debt based on how the developers work with the code and visualizes organizational factors like team coupling and system mastery. Free for Open Source.
  • CodSpeed - Automate performance tracking in your CI pipelines. Catch performance regressions before deployment, thanks to precise and consistent metrics. Free forever for Open Source projects.
  • coveralls.io — Display test coverage reports, free for Open Source
  • dareboost - 5 free analysis reports for web performance, accessibility, and security each month
  • deepcode.ai — DeepCode finds bugs, security vulnerabilities, performance and API issues based on AI. DeepCode’s speed of analysis allows us to analyze your code in real time and deliver results when you hit the save button in your IDE. Supported languages are Java, C/C++, JavaScript, Python, and TypeScript. Integrations with GitHub, BitBucket, and GitLab. Free for open source and private repos and up to 30 developers.
  • deepscan.io — Advanced static analysis for automatically finding runtime errors in JavaScript code, free for Open Source
  • DeepSource - DeepSource continuously analyzes source code changes, finding and fixing issues categorized under security, performance, anti-patterns, bug-risks, documentation, and style. Native integration with GitHub, GitLab, and Bitbucket.
  • DiffText - Instantly find the differences between two blocks of code. Completely free to use.
  • eversql.com — EverSQL - The #1 platform for database optimization. Gain critical insights into your database and SQL queries automatically.
  • gerrithub.io — Gerrit code review for GitHub repositories for free
  • gocover.io — Code coverage for any Go package
  • goreportcard.com — Code Quality for Go projects, free for Open Source
  • gtmetrix.com — Reports and thorough recommendations to optimize websites
  • holistic.dev - The #1 static code analyzer for Postgresql optimization. Performance, security, and architect database issues automatic detection service
  • houndci.com — Comments on GitHub commits about code quality, free for Open Source
  • Moderne.io — Automatic source code refactoring. Moderne offers framework migrations, code analysis with remediation, and unrivaled code transformation at scale, so developers can spend their time building new things instead of maintaining the old. Free for Open Source.
  • reviewable.io — Code review for GitHub repositories, free for public or personal repos.
  • parsers.dev - Abstract syntax tree parsers and intermediate representation compilers as a service
  • scan.coverity.com — Static code analysis for Java, C/C++, C# and JavaScript, free for Open Source
  • scrutinizer-ci.com — Continuous inspection platform, free for Open Source
  • semanticdiff.com — Programming language aware diff for GitHub pull requests and commits, free for public repositories
  • shields.io — Quality metadata badges for open source projects
  • sonarcloud.io — Automated source code analysis for Java, JavaScript, C/C++, C#, VB.NET, PHP, Objective-C, Swift, Python, Groovy and even more languages, free for Open Source
  • SourceLevel — Automated Code Review and Team Analytics. Free for Open Source and organizations up to 5 collaborators.
  • webceo.com — SEO tools but with also code verifications and different types of devices
  • zoompf.com — Fix the performance of your web sites, detailed analysis