No. 11 of 23 ·JavaScript Testing Frameworks

Intern

Web · Windows · Mac · Linux · Android · iPhone · Self-hosted

Freedom report

Two barsScore 5.7

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely6 of 6 device platforms
DocumentedPlans, terms and facts published

Intern is ranked #11 of 23 in JavaScript testing frameworks on Freedom251. It runs on Android, iOS, Linux, macOS, Self-hosted, Web, Windows.

Compared on JavaScript testing frameworks

Coverage reporting: Yes
Supported runtimes: Node.js, web browsers
Parallel execution: Yes

Best Intern alternatives

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The record

Purpose: Intern is a test system for writing and running tests for JavaScript libraries and applications.
Test languages: Tests can be written in JavaScript and TypeScript using styles such as TDD or BDD.
Execution: Tests can run in a browser, in Node.js, or across multiple browsers and platforms with the Intern test runner.
Code coverage: Intern provides code coverage reporting.
Test targets: The project README says Intern can test web pages and native or hybrid iOS and Android applications.
Browser automation: Intern supports WebDriver-compatible applications and services, including Selenium, Appium, and Selendroid.
Cloud integrations: The homepage lists Sauce Labs, BrowserStack, TestingBot, and a user's own Selenium Grid for running tests.
CI integrations: The homepage lists out-of-the-box integration with Travis CI, Jenkins, and TeamCity.
Extensibility: Intern's extensible architecture allows custom test interfaces, executors, and reporters.
Install: The homepage links to GitHub downloads and says to install Intern with `npm install intern`.
License: Intern is offered under the New BSD license.
Support: The homepage says free, community-provided support is available through Stack Overflow, Gitter, and IRC.
Compatibility limit: The project README says Intern does not support Internet Explorer 9.
Security: The GitHub repository links a security policy, but the opened product pages state no security certifications or compliance claims.

Where it ranks on Freedom251

Best JavaScript Testing Frameworks in 2026#11 of 23

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Sources

github.com/theintern/intern· checked 4 Oct 2026
theintern.io· checked 4 Oct 2026