Side by side
Intern vs Japa
Both stand on javascript testing frameworks. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan AndroidiPhoneLinux+4
Choose Intern if you need a free, extensible test system for JavaScript or TypeScript projects across Node.js, browsers, or mobile application interfaces. Teams that need Internet Explorer 9 support should look elsewhere.
Visit Intern Free plan ExtensionWeb
Japa brings backend, API, and browser testing into a single framework with multiple assertion options. Its ES module requirement and project-level setup are important fit considerations.
Visit JapaThe facts
| Intern | Japa | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Android, iPhone, Linux, Mac, Self-hosted, Web, Windows | Extension, Web |
| Lowest paid plan | Not published | Not published |
| Plans published | None | None |
| Maker | Not published | Not published |
| Website | theintern.io | japa.dev |
| On javascript testing frameworks | #4 of 23 | #8 of 23 |
Intern: what it does well
- Free and open source under the New BSD license
- Tests can be written in JavaScript or TypeScript
- Runs tests in browsers and Node.js
- Provides code coverage reporting
- Supports cloud testing and local Selenium setups
What to know first
- Does not support Internet Explorer 9
- Mobile application UI testing relies on tools such as Appium, ios-driver, or Selendroid
Japa: what it does well
- Supports API and browser testing.
- Includes datasets, snapshots, filtering, and lifecycle hooks.
- OpenAPI plugin checks response structure.
- Official VS Code extension can run tests.
- Free plan available.
What to know first
- Requires Node.js 18 or later.
- Works only with the ES module system.
- No separate CLI; requires a configured entry point.