TestingBot is described as 'Cross browser compatibility testing with Selenium Online. Automatically test your website on multiple browsers with Selenium' and is an website in the Web Browsers category. There are more than 10 alternatives to TestingBot, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and SaaS. The best alternative is LambdaTest, which is free. Other great sites and apps similar to TestingBot are BrowserStack (Paid), Browserling (Freemium), CrossBrowserTesting (Paid) and Codeception (Free, Open Source).
Browserling lets you quickly cross-browser test your websites in all the most popular browsers, such as Internet Explorer, Chrome, Safari, Opera and Firefox. We run the browsers in virtual machines and you get live access to them.
The all-in-one web testing platform supports manual, visual, and automated testing across more than 1500 different desktop and mobile browser configurations. Test on Safari, Internet Explorer, Android, iOS, and more.
MultiBrowser (or Multi-Browser Viewer) is a cross browser and functional web testing software tool, using REAL standalone browsers, an accurate mobile emulator and integrates seamlessly with Visual Studio and Selenium for automated testing.