Open Source Alternatives to Messenger

A messaging application that provides instant communication through text, voice, and video. The software allows users to send messages and make calls to contacts across different devices. It is designed for personal and professional communication and is deployed as a web application and mobile app. Users can maintain real time conversations with individuals or groups, sharing media and updates through a unified interface. The platform integrates with other social services to facilitate contact discovery and connectivity. It operates as a cross platform service available for download on mobile operating systems or accessible via a standard web browser. The service provides a way for people to stay connected regardless of their physical location or the specific hardware they use for communication.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to Messenger give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 1 open source alternative to Messenger. The most popular is Signal. It uses the AGPL-3.0 license and ships an official Docker image.