Selenium vs TestingBot: What are the differences?
Selenium: Web Browser Automation. Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that. Boring web-based administration tasks can (and should!) also be automated as well; TestingBot: Automated and manual cross browser testing. TestingBot provides automated and Manual cross browser testing in the cloud. Make sure your website looks ok in all browsers.
Selenium and TestingBot belong to "Browser Testing" category of the tech stack.
Selenium is an open source tool with 14.9K GitHub stars and 4.97K GitHub forks. Here's a link to Selenium's open source repository on GitHub.