Ruby on Rails, or simply Rails, is a server-side web application framework written in Ruby under the MIT License. Developed by David Heinemeier Hansson
License: Open Source
Zend Framework is a robust, enterprise-level PHP framework known for its flexibility and customizability, making it suitable for large applications. Ruby on Rails, on the other hand, emphasizes rapid development and ease of use, favored by startups for its convention-over-configuration approach.