FuelPHP vs Zend Framework: What are the differences?

What is FuelPHP? A fast, lightweight, community driven PHP5 framework. FuelPHP is a fast, lightweight PHP 5.4 framework. In an age where frameworks are a dime a dozen, We believe that FuelPHP will stand out in the crowd. It will do this by combining all the things you love about the great frameworks out there, while getting rid of the bad.

What is Zend Framework? An open source, object-oriented web application framework implemented in PHP 5. Zend Framework 2 is an open source framework for developing web applications and services using PHP 5.3+. Zend Framework 2 uses 100% object-oriented code and utilises most of the new features of PHP 5.3, namely namespaces, late static binding, lambda functions and closures.

FuelPHP and Zend Framework can be primarily classified as "Frameworks (Full Stack)" tools.

FuelPHP and Zend Framework are both open source tools. Zend Framework with 5.71K GitHub stars and 2.87K forks on GitHub appears to be more popular than FuelPHP with 284 GitHub stars and 57 GitHub forks.