Signal is an instant messaging platform focused on privacy and security. The application, with the same name, acts as an official client and allows access to its services. Behind Signal is a non-profit foundation that aims to provide users with a solvent, open-source, and tracker-free alternative to WhatsApp. Signal can be used on Android and iOS, as well as Windows, macOS, and Linux.

Some of the main functions of Signal are the following:

  • Secure and private sending of messages between two or more users. Signal lets users send text messages to other users. This data transfer is end-to-end encrypted.
  • Secure and private sending of files between two or more users. Signal supports the sending of a variety of additional formats, such as images, videos, documents, or voice notes. It is also possible to send contacts and locations. Everything is transmitted using the same security system used for sending messages.
  • Voice and video calls. This application can also be used to make calls and video calls between several users. As in the previous cases, these communications are point-to-point encrypted.
  • Creation of groups of up to 1000 participants. Signal groups work in much the same way as WhatsApp and Telegram groups. It is possible to define a user as an administrator and invite other users via a link. You can also customize the group icon or add a description.

The reality is that the functions of Signal are quite common. Why use it? The main reason why this application is recommended is because of its high degree of privacy and because it is presented as a secure environment. Although its direct competitors offer similar security systems for transmitting information, such as point-to-point encryption, its application does not collect personal data and does not send it to any server for analysis. All this is possible as a full-featured messaging application with all kinds of functionalities available.