Codacy

Codacy automates the repetitive stuff (static analysis, code style, coverage, complexity and duplication checks, etc.), and helps improve code quality, security, maintainability, ship code faster and save hours of work weekly. It integrates into your development workflows, so you maintain control of the quality of your code, and reduce technical debt throughout your sprints. Codacy is free for public, open source projects, and has a paid plan for private repositories.