EarlGrey vs Selenium: What are the differences?
EarlGrey: iOS UI Automation Test Framework, by Google. EarlGrey is a native iOS UI automation test framework that enables you to write clear, concise tests. With the EarlGrey framework, you have access to enhanced synchronization features. EarlGrey automatically synchronizes with the UI, network requests, and various queues; but still allows you to manually implement customized timings, if needed; 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.
EarlGrey and Selenium are primarily classified as "Mobile Testing Frameworks" and "Browser Testing" tools respectively.
EarlGrey and Selenium are both open source tools. It seems that Selenium with 14.9K GitHub stars and 4.97K forks on GitHub has more adoption than EarlGrey with 4.74K GitHub stars and 616 GitHub forks.