Who was the founder of messenger?

Messenger, originally known as Facebook Messenger, was developed by Facebook, which was founded by Mark Zuckerberg along with his college roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes in 2004. Messenger was launched as a standalone app in 2011, building on the messaging features integrated within the Facebook platform. While Zuckerberg is often recognized as the leading figure behind Facebook, the development of Messenger involved contributions from various engineers and designers at the company.