Azure DevOps Repos vs Reviewable

Azure DevOps Repos provides Git repositories as part of the Azure DevOps suite. It offers unlimited private Git repos with branch policies, pull request workflows, and code search capabilities for team collaboration.

Reviewable is Code review tool that layers on top of GitHub pull requests with line-by-line discussions and customizable review workflows.. It is available under a freemium model. This tool falls under the version control category.