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Robot Framework vs cucumber-ruby: open-source BDD tools compared

Metrics as of , from the GitHub or GitLab API of each repository. Refreshed monthly.

Summary

Robot Framework: Python automation framework with a plain text, keyword-based syntax for acceptance testing, ATDD and RPA.

cucumber-ruby: Ruby implementation of Cucumber that runs Gherkin feature files with Ruby step definitions.

Both are listed under BDD. The table gives repository metrics from the GitHub API with their fetch date, then the documented facts used for every comparison in this category, each linked to the README or docs page it comes from. A cell reads "not documented" when the fact was not found in the project's documentation (1 of 12 fact cells here); that does not mean the feature is absent.

Side by side

Robot Framework and cucumber-ruby: metrics and documented facts, in the fixed row order used for BDD comparisons.
FactRobot Frameworkcucumber-ruby
Stars11,90615,2121
Forks2,56611,1181
Contributors23714651
Last release2026-09-1412026-06-251
Last commit2026-09-2112026-09-181
Commits in 90 days2021541
LicenseApache-2.01MIT1
Primary languagePython1Ruby1
Statusactive1active1
Languages for writing testsRobot Framework plain text syntax; Python as the primary language for extending it source: READMERuby source: README
Specification formatPlain text keyword-driven test and task files (.robot), extended with libraries source: READMEGherkin feature files with Ruby step definitions source: README
Parallel or distributed executionExternal tools, developed as separate projects, for parallel execution source: Docs: Robot Framework User Guidenot documentednot found in the project's documentation as of
CI integrationxUnit compatible output for CI servers such as Jenkins; Jenkins Robot Framework plugin source: Docs: Robot Framework User GuideCI guide: run through Rake, Ant or Maven; JUnit formatter output for Jenkins source: Docs: Continuous Integration
Report formatsHTML log and report, XML and JSON output files, xUnit compatible XML source: Docs: Robot Framework User GuideBuilt-in formatters: message, progress, pretty, html, json, rerun, junit source: Docs: Reporting
Install methodpip (pip install robotframework) source: READMERubyGems (gem install cucumber) or Bundler (gem 'cucumber' in the Gemfile) source: README

1 Fetched from the GitHub or GitLab API on . Hover a value for its own date.

When each fits

Written from each project's documented scope, not from preference. Neither tool is ranked.

Robot Framework

Fits projects that automate acceptance testing, acceptance test driven development or robotic process automation; its README describes a plain text syntax extended with generic and custom libraries. source: README

cucumber-ruby

Fits projects that run automated tests for Ruby code written in plain language; its README describes plain-language tests that anyone on the team can read. source: README

More on these tools

Sources

  1. GitHub REST API: repository, read
  2. GitHub REST API: repository, read
  3. GitHub REST API: contributors, read
  4. GitHub REST API: contributors, read
  5. GitHub REST API: latest release, read
  6. GitHub REST API: latest release, read
  7. GitHub REST API: commits, read
  8. GitHub REST API: commits, read
  9. README, read
  10. README, read
  11. Docs: Robot Framework User Guide, read
  12. Docs: Continuous Integration, read
  13. Docs: Reporting, read

Documented facts collected 2026-09-22. See the methodology for how metrics and facts are gathered.