Signal – Beautiful Secure Multi-Platform Instant Messaging App

Signal is a free beautiful, open-source, and secure multi-platform instant messaging application. It features a modern design with controls that are easy to use thanks to its familiar user interface that is consistent across the different platforms.

It employs state-of-the-art end-to-end encryption powered by its open-source ‘Signal Protocol‘ which keeps user communication secure. While there are other instant messaging apps that employ end-to-end encryption, Signal is the only app that doesn’t collect any form of user data thanks to its philosophy against ads, affiliate marketers, and trackers.

With Signal, you can send messages to people directly or in groups as well as make audio and voice calls, transfer documents, Gifs, encrypted stickers, and media files.

Signal Instant Messaging App
Signal Instant Messaging App

Features in Signal

  • Free and open-source software with code available on GitHub.
  • Available on Windows, Linux, Mac, Android, and iOS.
  • A minimalist UI design.
  • Modern end-to-end encryption (powered by the open-source Signal Protocol).
  • Send disappearing messages.
  • Create and join groups.
  • Send text, voice, and picture messages.
  • Share document files.
  • Audio and video calls.
  • Custom (encrypted) stickers.

Signal got its much-deserved fame after the latest WhatsApp privacy policy updates hit the Internet shores. While the guys at Facebook can’t “see” the content that you send, WhatsApp uses telemetry algorithms in order to boost their advertising network.  While I am not speaking in favor or against this feature, I must point out that Signal is the privacy app of choice.

Another one of its cool features is the ability to keep your chat history clean by setting messages to disappear after a set time – a feature that not even WhatsApp has in 2021. Telegram does, but if for some reason you don’t like Telegram, Signal is the perfect WhatsApp alternative for you.

Install Signal on Ubuntu

The Signal is available to install on Debian/Ubuntu-based distributions using the following commands.

# NOTE: These instructions only work for 64 bit Debian-based
# Linux distributions such as Ubuntu, Mint, etc.

# 1. Install our official public software signing key
$ wget -O- |\
$ sudo apt-key add -

# 2. Add our repository to your list of repositories
$ echo "deb [arch=amd64] xenial main" |\
$ sudo tee -a /etc/apt/sources.list.d/signal-xenial.list

# 3. Update your package database and install signal
$ sudo apt update && sudo apt install signal-desktop

Are you a veteran Signal user or a recent ‘recruit’? It has become a lot better than it was when we first covered so you can rest assured that you’re using a first-class app.

You’re welcome to share your experiences with Signal and other instant messaging apps in the comments section below.

Divine Okoi is a cybersecurity postgrad with a passion for the open-source community. With 700+ articles covering different topics in IT, you can always trust him to inform you about the coolest tech.

Each tutorial at GeeksMint is created by a team of experienced writers so that it meets our high-quality writing standards.

3 thoughts on “Signal – Beautiful Secure Multi-Platform Instant Messaging App”

    • There is one big issue – Telegram is commercial protocol and sooner or later – the company behind it will try to monetize their users with selling users data to third-party companies and governments. The only difference from Facebook (WhatsApp) is that there are not doing it right now (at least they claim that there are not doing it).

      Signal is open-source and with privacy in mind. So there is no spying modules (so called “telemetry”) that every other commercial chat program have (including Telegram, Discord and of course the worst chat programs like Facebook WhatsApp or Facebook Messenger).


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