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Top 18 Ruby Code Analysis and Metric Projects
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Judoscale
Save 47% on cloud hosting with autoscaling that just works. Judoscale integrates with Rails, Sidekiq, Solid Queue, and more to make autoscaling easy and reliable. Save big, and say goodbye to request timeouts and backed-up job queues.
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SimpleCov
Code coverage for Ruby with a powerful configuration library and automatic merging of coverage across test suites
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InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
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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.
Taking actual measurements is pretty easy and usually limited to execution of a single command. In ruby universe that would be flog.
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Traceroute
A Rake task gem that helps you find the unused routes and controller actions for your Rails 3+ app
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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.
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undercover
undercover warns about methods, classes and blocks that were changed without tests, to help you easily find untested code and reduce the number of bugs. It does so by analysing data from git diffs, code structure and SimpleCov coverage reports
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bundler-leak
Known-leaky gems verification for bundler: `bundle leak` to check your app and find leaky gems in your Gemfile :gem::droplet:
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CodeRabbit
CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Ruby Code Analysis and Metrics discussion
Ruby Code Analysis and Metrics related posts
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Practical approach to software complexity
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The flog gem reports the most tortured code in an easy to read pain report
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Pronto: Quick automated code review of your changes
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First commits in a Ruby on Rails app
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Crates that run multiple versions of a function and ensures the return value is the same?
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Scientist: A Ruby library for carefully refactoring critical paths
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Test Against Reality
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A note from our sponsor - Judoscale
judoscale.com | 22 Apr 2025
Index
What are some of the best open-source Code Analysis and Metric projects in Ruby? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Scientist | 7,547 |
| 2 | SimpleCov | 4,818 |
| 3 | rails_best_practices | 4,171 |
| 4 | Reek | 4,079 |
| 5 | Rubycritic | 3,396 |
| 6 | Pronto | 2,641 |
| 7 | Coverband | 2,554 |
| 8 | Fasterer | 1,812 |
| 9 | Barkeep | 1,423 |
| 10 | suture | 1,410 |
| 11 | Cane | 1,313 |
| 12 | Flog | 950 |
| 13 | Traceroute | 901 |
| 14 | Flay | 746 |
| 15 | undercover | 738 |
| 16 | MetricFu | 627 |
| 17 | bundler-leak | 294 |
| 18 | Pippi | 286 |
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