Instantbird is a cross-platform instant messaging client based on Mozillas XULRunner and the open source library libpurple used in Pidgin. Developed by Florian Quèze and Quentin Castier
License: Open Source
Facebook Messenger is a feature-rich, widely used app offering voice and video call functionalities, making it ideal for users deeply integrated with the Facebook ecosystem. In contrast, Instantbird is an open-source, customizable messaging client that prioritizes privacy and allows multiple account support, but lacks some of the advanced communication features of Messenger.