Reek vs RuboCop: What are the differences?
Reek: Code smell detector for Ruby. Reek is a tool that examines Ruby classes, modules, and methods and reports any Code Smells it finds; RuboCop: A Ruby static code analyzer, based on the community Ruby style guide. RuboCop is a Ruby static code analyzer. Out of the box it will enforce many of the guidelines outlined in the community Ruby Style Guide.
Reek and RuboCop can be categorized as "Code Review" tools.
Reek and RuboCop are both open source tools. It seems that RuboCop with 10.1K GitHub stars and 2.11K forks on GitHub has more adoption than Reek with 3.08K GitHub stars and 225 GitHub forks.