coala vs Scrutinizer: What are the differences?
coala: Linting and fixing code for all languages. coala is a language independent analysis toolkit. It empowers developers to create rules which a project's code should conform to. coala takes care of showing these issues to users in a friendly manner, is versatile and can be used in any environment; Scrutinizer: Continuous inspection platform - improve code quality and find bugs before they hit production. Scrutinizer is a continuous inspection platform helping you to create better software.
coala and Scrutinizer can be categorized as "Code Review" tools.
coala is an open source tool with 2.82K GitHub stars and 1.33K GitHub forks. Here's a link to coala's open source repository on GitHub.