bitHound (JS and Dependency Management) https://www.bithound.io/
Sensio Insight (PHP) https://insight.sensiolabs.com
Code Climate (lots) https://codeclimate.com/engines
Codacy (Scala Ruby JS Java PHP Python) https://www.codacy.com/
Scrutinizer-CI () https://scrutinizer-ci.com/
Continuous Integration and Testing https://travis-ci.com
Landscape (Python) https://landscape.io/
Coverty (C/C++ but not also Java, JS, C#) https://scan.coverity.com/projects
...as well as https://en.wikipedia.org/wiki/List_of_tools_for_static_code_analysis