What are some alternatives?
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Refactor.io - Share your code instantly for refactoring and code review
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
CodeFactor.io - Automated Code Review for GitHub & BitBucket
Redmine - Flexible project management web application