§2024-09-07

Signal is an open-source, encrypted messaging service for instant messaging, voice calls, and video calls.[14][15] The instant messaging function includes sending text, voice notes, images, videos, and other files.[16] Communication may be one-to-one between users or may involve group messaging.

Signal uses mobile telephone numbers to register and manage user accounts, though configurable usernames were added in March 2024 to allow users to hide their phone numbers from other users.

The non-profit Signal Foundation was launched in February 2018 with initial funding of $50 million from WhatsApp co-founder Brian Acton. As of January 2022, the platform had approximately 40 million monthly active users. As of May 2021, it was downloaded more than 105 million times

Signal, the popular encrypted messaging app, is primarily written in Java for its Android version and Swift for its iOS version. The desktop application is developed using Electron, which allows it to run on multiple platforms using web technologies like JavaScript, HTML, and CSS. Signal's codebase is open source, and you can find it on GitHub if you're interested in delving deeper into its implementation.

Jitsi Meet is primarily written in JavaScript. It uses React for its user interface, and the backend server components are written in Java. The frontend is built using modern web technologies such as React, Redux, and WebRTC for real-time communication. Jitsi Meet also leverages various libraries and tools from the broader JavaScript ecosystem to provide a robust and scalable video conferencing solution.

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