Codacy is described as 'Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints' and is an app in the development category. There are more than 25 alternatives to Codacy for a variety of platforms, including Linux, Windows, Web-based, Mac and SaaS apps. The best Codacy alternative is SonarQube, which is both free and Open Source. Other great apps like Codacy are Pyrefly, Ruff, Codenudge and PyLint.
Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. It automates the process of checking Java code to spare humans of this boring (but important) task. This makes it ideal for projects that want to enforce a coding standard.
