Side by side

grcov vs Istanbul

Both stand on test coverage tools. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Istanbul provides coverage measurement and reporting for JavaScript projects, with source-mapped coverage also listed for Babel and TypeScript. Consider the lack of pull-request annotations if those are needed in your workflow.

Visit Istanbul

The facts

	grcov	Istanbul
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	Linux, Mac, Windows	API
Lowest paid plan	Not published	Not published
Plans published	None	None
Maker	Not published	Not published
Website	github.com	istanbul.js.org
On test coverage tools	#25 of 27	#21 of 27

grcov: what it does well

Istanbul: what it does well

Tracks line, statement, function, and branch coverage.
Supports ES5 and ES2015+ JavaScript.
Produces text, HTML, and lcov reports.
nyc supports subprocess instrumentation.
Free and open source under the Revised BSD License.

What to know first

Does not provide pull-request annotations.
Listed platform is API.

Alternatives to grcov Alternatives to Istanbul The whole list