Reviewable vs Scrutinizer: What are the differences?

Developers describe Reviewable as "GitHub code reviews done right". A code review tool for GitHub pull requests inspired by Google's internal tool. Powerful diffing and workflow features wrapped in a beautiful UI, with seamless GitHub integration. Free for public repos. On the other hand, Scrutinizer is detailed as "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.

Reviewable and Scrutinizer can be primarily classified as "Code Review" tools.

Some of the features offered by Reviewable are:

• See only what changed since last time you looked (even if rebased).
• Instantly diff any two revisions of a file, in one or two columns.
• Customize code font, syntax highlighting, max line length.

On the other hand, Scrutinizer provides the following key features:

• Continuously measure and track your code quality
• Project quality broken down
• Know your problem areas

"Batch commenting" is the primary reason why developers consider Reviewable over the competitors, whereas "Github integration / sync" was stated as the key factor in picking Scrutinizer.