WebdriverIO vs Endtest

WebdriverIO lets you use your favorite testing framework (Jasmine, Mocha, Cucumber) and assertion library (Chai for Mocha). Other projects implement their own testing and assertion APIs, for example Nightwatch, Intern.

It should be mentioned though that v4.2.16 has an incompatibility with at least tap v7.1.2: stdout/stderr written during a run gets lost.

Chimp.js, is an emerging web application test framework that implements easy sync tests using WebdriverIO, CucumberJS and Chai. Features include:

• synchronous style
• built-in "widget framework" (an implementation of the PageObject pattern)
• automatically downloads dependencies (ChromeDriver, PhantomJS etc.)
• works with SauceLabs and BrowserStack (CrossBrowserTesting TBD)
• automatically takes screenshots on failures
• works on Windows in addition to Linux and OS X
• automatically produces boilerplate code for step definitions, which you can copy, paste and edit
• file watcher reuses the browser sessions and can run only the tests you tag, to maximize development speed

So you don't need to worry about promises

Run wdio config and WebdriverIO will generate a config file for testing locally vs. in the cloud, specifying the test framework (Jasmine, Cucumber, Mocha), where to find tests and store screenshots etc.

WebdriverIO has a plugin called WebdriverCSS that allows you to do cross visual platfrom/browser tests with an integration to Applitools.

WebdriverIO is accessible via gulp and grunt and even has a Sublime Text plugin for autocompletion.

selenium-webdriverjs:

driver.get('http://www.google.com');
driver.findElement(webdriver.By.id('q')).sendKeys('webdriver');
driver.findElement(webdriver.By.id('btnG')).click();

WD.js:

browser
  .get("http://www.google.com")
  .elementById('q')
  .sendKeys('webdriver')
  .elementById('btnG')
  .click()

WebdriverIO:

client
    .url('http://google.com')
    .setValue('#q','webdriver')
    .click('#btnG')

If you develop web applications with Meteor.js, you might want to use the xlovio:webdriver wrapper, because it's the Selenium binding behind the preferred testing framework (Chimp) promoted by the Velocity (Meteor's official testing framework) team for using BDD via Cucumber.

Service is provided by WebdriverIO which over comes the con of starting selenium server independently.
Reference: http://webdriver.io/guide/services/selenium-standalone.html

Endtest allows you to create automated tests for web applications, directly on their cloud infrastructure. No coding skills are required.
You can also choose the action "Execute Javascript" for a more flexible test run.

You can easily run your automated tests on their platform, just by clicking the run button.

It has an API which allows testers to run it on Jenkins or Team City. Other than that, it has a built-in test scheduler to allow testers to preset test executions.

Endtest has added a new feature which now supports mobile testing for both Android and iOS (.apk and .ipa).

You can export your automated tests in a variety of different formats, and run them on your own infrastructure. The formats are either in Python file format or executable file format (.EXE).

As of March 2018, Endtest can now support multiple platforms (Windows, MAC, Android and iOS), Operating Systems, and more than a handful of devices for both Android and iOS.

Their pricing plan ($79/month or $650/year) includes team plan upgrade, which means the whole team, regardless of the number of users, will only need to subscribe to the $79/month or $650/year plan. This includes unlimited test runs, test exports, recordings, etc.

The free plan covers a lot, you can have up to 3 test suites, and you can run your automated tests as many times as you want. The pro plan includes some very advanced options that you might need only if you're working with a team (for example, the collaboration feature, schedule test run, API for Jenkins, etc.).