SimpleCov VS Rubocop

Compare SimpleCov vs Rubocop and see what are their differences.


Code coverage for Ruby with a powerful configuration library and automatic merging of coverage across test suites (by simplecov-ruby)


A Ruby static code analyzer and formatter, based on the community Ruby style guide. [Moved to:] (by rubocop-hq)
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SimpleCov Rubocop
10 7
4,630 11,323
0.4% -
0.0 9.8
8 days ago over 2 years ago
Ruby Ruby
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of SimpleCov. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-12-29.
  • My First Code Commit in Ruby
    2 projects | | 29 Dec 2022
    My talk is about different best practices - specifically when adhering to them breaks down. One of those best practices is high test coverage. I start to work on the content for my presentation by building the code samples that I want to use in the slides. For the code coverage section, I'm writing some code with some tests. I'm using SimpleCov to generate code coverage results.
  • Improve Code in Your Ruby Application with RubyCritic
    7 projects | | 26 Oct 2022
    SimpleCov - a tool to check Ruby application code coverage. You can configure it to run alongside your tests. It provides metrics on code coverage so that you can identify what you need to pay attention to and where to invest your time to create better test cases.
  • Paying Down Technical Debt
    2 projects | | 1 Mar 2022
    Ensure that you have sufficient test coverage. You can use code coverage analysis tools like SimpleCov to gain insight into gaps in your coverage.
  • How to test all workers in one big loop?
    2 projects | /r/rails | 2 Dec 2021
    simplecov might the answer you need, it generates a report of the lines of code your test suite hits.
  • How to Improve Code Quality on a Ruby on Rails Application
    8 projects | | 11 Nov 2021
    Use SimpleCov to generate a report of how many statements are covered by your test suite. It won't assess the test suite quality, though.
  • Ruby's Got You Covered
    2 projects | | 21 Oct 2021
    There are many tools for measuring test coverage, but one is SimpleCov. It also supports branches coverage. To measure coverage of production code, check out Coverband, which you can set up to use oneshot lines mode.
  • Como configurar ambiente de testes em Ruby on Rails com RSpec
    7 projects | | 21 Apr 2021
  • Question about wrapping instance vars in attr_reader
    3 projects | /r/ruby | 16 Feb 2021
    Technically you could measure the usage with MethodCoverage. But that is future talk for simplecov. So in theory we could visualize unused instance variables


Posts with mentions or reviews of Rubocop. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-06-28.

What are some alternatives?

When comparing SimpleCov and Rubocop you can also consider the following projects:

Rubycritic - A Ruby code quality reporter

Reek - Code smell detector for Ruby

Brakeman - A static analysis security vulnerability scanner for Ruby on Rails applications

Coverband - Ruby production code coverage collection and reporting (line of code usage)

Pronto - Quick automated code review of your changes

rails_best_practices - a code metric tool for rails projects

Flog - Flog reports the most tortured code in an easy to read pain report. The higher the score, the more pain the code is in.

undercover - Actionable code coverage - detects untested code blocks in recent changes

Fasterer - :zap: Don't make your Rubies go fast. Make them go fasterer ™. :zap:

Flay - Flay analyzes code for structural similarities. Differences in literal values, variable, class, method names, whitespace, programming style, braces vs do/end, etc are all ignored.