Chromeless vs Selenium: What are the differences?
Developers describe Chromeless as "🖥 Chrome automation made simple. Runs locally or headless on AWS Lambda". Chrome automation made simple. Runs locally or headless on AWS Lambda. On the other hand, Selenium is detailed as "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.
Chromeless and Selenium are primarily classified as "Headless Browsers" and "Browser Testing" tools respectively.
Chromeless 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 Chromeless with 13.2K GitHub stars and 602 GitHub forks.