Rainforest QA vs Selenium: What are the differences?
Rainforest QA: Front-end QA as a service. Rainforest gives you the reliability of a QA team and the speed of automation, without the hassle of managing a team or the pain of writing automated tests; 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.
Rainforest QA and Selenium can be categorized as "Browser Testing" tools.
"Cross-browser testing" is the top reason why over 12 developers like Rainforest QA, while over 149 developers mention "Automates browsers" as the leading cause for choosing Selenium.
Selenium is an open source tool with 14.7K GitHub stars and 4.92K GitHub forks. Here's a link to Selenium's open source repository on GitHub.