SimpleCov

Web · Windows · Mac · Linux

Freedom report

Three barsScore 6.6

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely4 of 6 device platforms
DocumentedPlans, terms and facts published

SimpleCov is ranked #2 of 26 in test coverage tools on Freedom251. It runs on Linux, macOS, Web, Windows. There is a free plan.

SimpleCov plans and pricing

All plans

SimpleCov Free Ruby code coverage · MIT licensed github.com · 30 Sept 2026

Compared on test coverage tools

Free plan: Yes
Coverage types: line, branch, method, oneshot-line, eval
Supported languages: Ruby
Report formats: HTML, JSON
Historical trends: Yes
Coverage gates: Yes

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The record

Purpose: SimpleCov analyzes Ruby code coverage using Ruby’s built-in Coverage library.
Reports: It includes HTML and JSON formatters and can merge coverage results across test suites.
Configuration: Configuration supports filters, groups, profiles, line and branch coverage, and coverage thresholds.
Test mapping: Opt-in test tracking can show which RSpec examples or Minitest tests cover a line.
Production usage: Oneshot coverage can record production code usage for identifying code that tests or live traffic do not touch.
Change coverage: The CLI can calculate coverage for changed lines and use a minimum threshold as a gate.
View templates: With the Rails profile, it can include ERB, Haml, and Slim templates in coverage reports.
CLI: The command line includes report viewing, test selection, patch coverage, history, status, and badge commands.
Integrations: The README points to open source formatter and integration plugins, editor integrations, and hosted commercial services.
Compatibility: The project says it is built in CI on Ruby 3.2+ and JRuby 10+; JRuby supports line coverage only.
Setup constraint: SimpleCov must start before application code is required to track those files.
Support: The project directs users to its issue tracker for code and bug reports and its Google Groups mailing list for discussion and announcements.
License: The repository identifies SimpleCov as MIT licensed.
Security and compliance: The repository page shows a Security and quality section but states no security certification or compliance standard in the README.
Price from: Free

Where it ranks on Freedom251

Best Test Coverage Tools in 2026#2 of 26

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Sources

github.com/simplecov-ruby/simplecov· checked 30 Sept 2026