Pure instant messaging — simple, fast, secure, and synced across all your devices. One of the world's top 10 most downloaded apps with over 500 million active users.
      FAST: Telegram is the fastest messaging app on the market, connecting people via a unique, distributed network of data centers around the globe.
      SYNCED: You can access your messages from all your phones, tablets and computers at once. Telegram apps are standalone, so you don’t need to keep your phone connected. Start typing on one device and finish the message from another. Never lose your data again.
      UNLIMITED: You can send media and files, without any limits on their type and size. Your entire chat history will require no disk space on your device, and will be securely stored in the Telegram cloud for as long as you need it.
      SECURE: We made it our mission to provide the best security combined with ease of use. Everything on Telegram, including chats, groups, media, etc. is encrypted using a combination of 256-bit symmetric AES encryption, 2048-bit RSA encryption, and Diffie–Hellman secure key exchange.
      100% FREE &amp; OPEN: Telegram has a fully documented and free API for developers, open source apps and verifiable builds to prove the app you download is built from the exact same source code that is published.
      POWERFUL: You can create group chats with up to 200,000 members, share large videos, documents of any type (.DOCX, .MP3, .ZIP, etc.) up to 2 GB each, and even set up bots for specific tasks. Telegram is the perfect tool for hosting online communities and coordinating teamwork.
      RELIABLE: Built to deliver your messages using as little data as possible, Telegram is the most reliable messaging system ever made. It works even on the weakest mobile connections.
      FUN: Telegram has powerful photo and video editing tools, animated stickers and emoji, fully customizable themes to change the appearance of your app, and an open sticker/GIF platform to cater to all your expressive needs.
      SIMPLE: While providing an unprecedented array of features, we take great care to keep the interface clean. Telegram is so simple you already know how to use it.
      PRIVATE: We take your privacy seriously and will never give any third parties access to your data. You can delete any message you ever sent or received for both sides, at any time and without a trace. Telegram will never use your data to show you ads.
      We keep expanding the boundaries of what you can do with a messaging app. Don’t wait years for older messengers to catch up with Telegram — join the revolution today.
    

Telegram

Feature rich WhatsApp web client based on Qt WebEngine.
      Key features of Whatsie:
      
        Light and Dark Themes with automatic switching
        Customized Notifications &amp; Native Notifications
        Global App shortcuts
        BuiltIn download manager
        Mute Audio, Disable Notifications
        App Lock feature
        Built in Spell Checker (with support for 31 Major languages)
      
      Other settings that let you control every aspect of WebApp like:
      
        Do not disturb mode
        Full view mode, lets you expand the main view to the full width of the window
        Ability to switch between Native &amp; Custom notification
        Configurable notification popup timeout
        Mute all audio from Whatapp
        Minimize to tray on application start
        Enable disable app lock on application start
        Auto-locking after a certain interval of time
      
    

Whatsie


      Nicotine+ is a graphical client for the Soulseek peer-to-peer
      network.
    
      
      Nicotine+ aims to be a lightweight, pleasant, free and open
      source (FOSS) alternative to the official Soulseek client, while
      also providing a comprehensive set of features.
    
    

Nicotine+


      Karere is a production-ready GTK4 WhatsApp client that provides a native desktop experience
      for WhatsApp Web. Built with Vala, GTK4, and Libadwaita, it offers a clean and
      intuitive interface that integrates seamlessly with your Linux desktop.
    
      
      Features:
    
      
        Native GTK4 interface with Libadwaita styling
        Blueprint UI with declarative interface design
        Persistent login data and cookie management
        Settings dialog with theme selection and privacy controls
        Full WhatsApp Web functionality with desktop integration
        Hardware-accelerated WebKit rendering
        Comprehensive crash reporting with privacy controls
        Graceful shutdown with window state persistence
        Production hardening with security enhancements
        Professional logging system with rotation
        Signal handling for proper system integration
      
    

Karere

Telegram Desktop based messenger with Material Design and additional features
    

materialgram

Delta Chat is a reliable decentralized instant messenger that is easy and fun to use for friends, family, groups and organizations.
      Delta Chat is developed by a dedicated FOSS contributor community that jointly releases refinements and new features several times a year,
      across many stores and platforms world-wide.
      Features at a glance:
      
        🌐 Anonymous. Instant onboarding without a phone number, e-mail or other private data.
        📱 Flexible. Supports multiple chat profiles and is easy to setup on multiple devices.
        🧩 Extensible. Add tools like shopping lists, calendars or gaming apps to any chat.
        🌧️ Reliable. Works under bad and adversarial network conditions.
        🛡️ Secure. Audited End-to-End encryption safe against network and server attacks.
        🏠 Sovereign. Can be run with your own e-mail address or server.
        📜 FOSS. Fully Open Source/Free Software, built on Internet Standards.
      
    

Delta Chat

Decentralized private messenger with chat-shared tools and games

Gajim aims to be an easy to use and fully-featured XMPP client. Just chat with your friends or family, easily share pictures and thoughts or discuss the news with your groups.
      
        Chat freely: Take your chats where you want. Use a provider of your choice and synchronize chats between all your devices. Gajim is interoperable with many other chat apps – and it's free.
        Secured conversations: State of the art end-to-end encryption for your conversations. Share messages, pictures, and files with your contacts – and only with them.
        Stay in contact: Chats and groups help you keep in touch with your friends and family. Build communities by connecting to people with the same interests. Use groups to organize the little things or the next big event.
        Express yourself: Sometimes words are not enough. Use reactions, replies, record voice messages, and send status updates to fully express yourself.
      
    

Gajim

Open source, low-latency, high quality voice chat.
    

Mumble

Unofficial messaging app based on Telegram Desktop.
      Telegram is a popular messaging protocol with encryption and security as its key focus.
    

Kotatogram


      Flare is an unofficial app for Signal. It is still in development and doesn't include all the features that the official Signal apps do. More information can be found on its feature roadmap.
    
      
      Please note that using this application will probably worsen your security compared to using official Signal applications.
      Use with care when handling sensitive data.
      Look at the projects README for more information about security.
    
    

Flare

Chats is a simple to use to messaging app for 1:1 communication and small groups supporting SMS, MMS, XMPP and Matrix.
    

Chats

Messaging application for mobile and desktop

Messenger-GTK is a convergent GTK messaging application using the GNUnet Messenger service. The goal is to provide private and secure communication between any group of devices.
      The application provides the following features:
      
        Creating direct chats and group chats
        Managing your contacts and groups
        Invite contacts to a group
        Sending text messages
        Sending voice recordings
        Sharing files privately
        Deleting messages with any custom delay
        Renaming contacts
        Exchanging contact details physically
        Verifying contact identities
        Switching between different accounts
        Chatting live via video or voice streaming
        Sharing your screen with a selected group
      
      Chats will generally created as opt-in. So you can decide who may contact you directly and who does not, accepting to a direct chat. Leaving a chat is also always possible.
    

GNUnet Messenger


Selene is a comprehensive peer-to-peer chat and file sharing application built on the Tor network.
It enables secure, private communication and seamless file transfers between users, leveraging the anonymity and resilience of Tor.

      
Key Features:

      
        True peer-to-peer messaging: messages travel exclusively over the Tor network, never leaving Tor at any point
        End-to-end RSA encryption for messages, with selectable key lengths: 2048, 4096, or 8192 bits
        File sharing via ephemeral Tor hidden service HTTP servers: recipients access files directly using the provided onion address in Tor Browser or any Tor-enabled private window
        Request new Tor circuits and onion addresses for improved connectivity and privacy
        Configurable Tor ports for advanced users
        Contact export/import and rich messaging features including emojis and file transfers
        Advanced logging system and chat history management
        Password protection at startup for enhanced privacy
        Cross-platform: built with Qt Framework
      
      
Selene is designed for privacy advocates and secure communication enthusiasts, offering a robust suite of features for confidential, flexible, and user-friendly Tor-based messaging and file sharing.

    

Selene

Tor-based p2p chat and file sharing manager

Kaidan is a user-friendly and modern chat app for every device. It uses the open communication protocol XMPP (Jabber). Unlike other chat apps, you are not dependent on one specific service provider.
      Kaidan does not have all basic features yet and has still some stability issues. But we do our best to improve it!
    

Kaidan

OkMSG 支持独立私有化部署的集即时消息、语音、视频通话、发送文件、会议等
         多种功能于一身的开源项目，同时让您的企业更加有效开启协作、有效沟通，
         控制成本，开拓新业务，并帮助您加速发展业务。
    

OkMSG Desktop

OkMSG 是由OkStar(okstar.org)社区开发和维护的注重数据安全与保护的企业通讯协同工具。


            signal-cli is an unofficial commandline interface for the Signal Messenger.
            It supports many Signal functions, including registering, verifying, sending and receiving messages.
            For registering you need a phone number where you can receive SMS or incoming calls.
            Alternatively signal-cli can be linked to an existing App account.
        
    

signal-cli

Flathub is the place to get and distribute apps for Linux. It is powered by Flatpak which allows Flathub apps to run on almost any Linux distribution.

Please use the flatpak manager supplied by your distribution to install add-ons.

The source code is public and can be independently audited, which makes the app more likely to be safe

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Can access the contents of the screen or other windows

Upload your app to Flathub by uploading your Flatpak manifest and supporting files to a repository in our GitHub organization. Flathub's buildbot will build the app and publish it to Flathub.

Consulting services for submitting apps to Flathub.

Build your app in your own continuous integration environment and upload it directly to Flathub.

Install Flatpak

<text>Flatpak can be installed from the community repository. Run the following in a terminal:</text> <code></code>

Install the Software Flatpak plugin

<text>You can install the Flatpak plugin for either the GNOME Software (since v3.13) or KDE Discover (since v3.11), making it possible to install apps without needing the command line. To install, for GNOME Software run:</text> <code></code> <text>For KDE Discover run:</text> <codeDiscover></codeDiscover>

Add the Flathub repository

<text>Flathub is the best place to get Flatpak apps. To enable it, download and install the <filelink>Flathub repository file</filelink> or run the following in a terminal:</text> <code></code>

Restart

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text>

<text>To install Flatpak on operating systems of the Alt family, open the Terminal app and run:</text> <code></code>

<text>Flathub is a great place to get Flatpak apps. To enable it on your Alt system, run:</text> <code></code>

<text>Restart your device to complete the Flatpak installation. Now you can <link>install apps</link>!</text>

<text>To install Flatpak on Arch, open the Terminal app and run:</text> <code></code>

Enable Linux support

<text>Navigate to <settingslink>chrome://os-settings</settingslink>, and scroll down to Developers and turn on Linux development environment. ChromeOS will take some time downloading and installing Linux.</text>

Start a Linux terminal

<text>Press the Search/Launcher key, type "Terminal", and launch the Terminal app.</text>

<text>To install Flatpak, run the following in the terminal:</text> <code></code>

<text>Flathub is the best place to get Flatpak apps. To enable it, run:</text> <code></code>

<text>To complete setup, restart Linux. You can do this by right-clicking terminal, and then clicking "Shut down Linux". Now all you have to do is <link>install apps</link>!</text>

<text>To install Flatpak in Crystal Linux, you must first make sure your packages are up to date. Run the following in a terminal:</text> <codeUpdate></codeUpdate> <text>Then install Flatpak:</text> <code></code>

<text>A flatpak package is available in Debian 10 (Buster) and newer. To install it, run the following as root:</text> <code></code>

<text>If you are running GNOME, it is also a good idea to install the Flatpak plugin for GNOME Software. To do this, run:</text> <code></code> <text>If you are running KDE, you should instead install the Plasma Discover Flatpak backend:</text> <codeDiscover></codeDiscover>

<text>To install Flatpak on Deepin, run the following in a terminal:</text> <code></code>

Install the Deepin themes

<text>To install light and dark themes, run:</text> <code></code>

Install Apps

<text>elementary OS 5.1 and newer comes with Flatpak support out of the box. For non-curated apps, head to <link>Flathub</link> to install any app using the big "Install" button, and open the downloaded `.flatpakref` file with Sideload.</text> <text>Note: After installing one app from a remote like Flathub, all other apps from that remote will also automatically show up in AppCenter.</text>

<text>To install Flatpak on EndeavorOS, you must first make sure your installation is up to date, run the following in a terminal:</text> <codeUpdate></codeUpdate> <text>Then install Flatpak:</text> <code></code>

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text> <text>Note: graphical installation of Flatpak apps may not be possible with EndeavourOS.</text>

<text>To install Flatpak on Gentoo, open the Terminal app and run:</text> <code></code>

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text> <text>Note: graphical installation of Flatpak apps may not be possible with Gentoo.</text>

<text>To install Flatpak on GNU Guix, run the following in a terminal:</text> <code></code>

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text> <text>Note: graphical installation of Flatpak apps may not be possible with GNU Guix.</text>

<text>To install Flatpak on Kubuntu, open Discover, go to Settings, install the Flatpak backend and restart Discover.</text>

Install the Flatpak system settings add-on

<text>To integrate Flatpak support into the Plasma System Settings, open the Terminal app and run:</text> <code></code>

<text>Flathub is the best place to get Flatpak apps. To enable it, open Discover, go to Settings and add the Flathub repository.</text>

<text>A flatpak package is available for Mageia 6 and newer. To install with DNF, run the following as root:</text> <code></code> <text>Or, to install with urpmi, run:</text> <codeUrpmi></codeUrpmi>

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text> <text>Note: graphical installation of Flatpak apps may not be possible with Mageia.</text>

Enable Flatpak through the Software Manager

<text>Flatpak is installed by default on Manjaro 20 or higher.</text> <text>To enable its support, navigate to the Software Manager (Add/Remove Programs)</text> <text>Click on the triple line menu [or dots depending on the Desktop Environment] on the right, in the drop down menu select "Preferences"</text> <text>Navigate to the "Flatpak" tab and slide the toggle to Enable Flatpak support (it is also possible to enable checking for updates, which is recommended).</text>

<text>Flatpak support is built in from MX 18 and later. It is only required to activate the Flathub repository following these instructions:</text> <text>Open MX Package Installer (open the menu and look in MX Tools), select the "Flatpaks" tab, to activate the repository you will need to enter the root password.</text>

<text>To install Flatpak, set NixOS option services.flatpak.enable to true by putting the following into your /etc/nixos/configuration.nix:</text> <code></code> <text>Then, rebuild and switch to the new configuration with:</text> <codeRebuild></codeRebuild> <text>For more details see the <doclink>NixOS documentation</doclink>.</text>

<text>Flatpak is available in the default repositories of all currently maintained openSUSE Leap and openSUSE Tumbleweed versions.</text> <text>If you prefer a graphical installation, you can install Flatpak using a "1-click installer" from <link>software.opensuse.org</link>. If your distribution version is not shown by default, click Show under Unsupported distributions category and then select from the list.</text> <text>Alternatively, install Flatpak from the command line using Zypper:</text> <code></code>

<text>A flatpak package is available in Pardus 2019 and newer. To install it, run the following as root:</text> <code></code>

<text>If you are running GNOME, it is also a good idea to install the Flatpak plugin for GNOME Software. To do this, run:</text> <code></code>

<text>A flatpak package is available in Pisi 2.1 and newer. To install it, run the following as root:</text> <code></code>

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text> <text>Note: graphical installation of Flatpak apps may not be possible with Pisi GNU/Linux.</text>

<text>A flatpak package is available in Raspberry Pi OS (previously called Raspbian) Stretch and newer. To install it, run the following as root:</text> <code></code>

<text>Flathub is the best place to get Flatpak apps. To enable it, run:</text> <code></code> <text>Important note: It is recommended to use Raspberry Pi OS 64-bit as newer applications are more likely to be available for that platform only.</text>

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text> <text>Note: graphical installation of Flatpak apps may not be possible with Raspberry Pi OS.</text>

<text>Flatpak is installed by default on Rocky Linux 8 and newer, when installed with a software selection that includes GNOME (Server with GUI, Workstation). If you are using such a system, you may skip this step. To install Flatpak on Rocky Linux, run the following in a terminal:</text> <code></code>

<text>To install Flatpak on Solus, open the Terminal app and run:</text> <code></code>

<text>To complete setup, restart your system. Now all you have to do is <link>install apps</link>!</text> <text>Note: graphical installation of Flatpak apps is available only through GNOME Software and/or KDE Discover.</text>

<text>To install Flatpak on Ubuntu 18.10 (Cosmic Cuttlefish) or later, open the Terminal app and run:</text> <code></code>

Install GNOME Software Flatpak plugin

<text>The GNOME Software plugin makes it possible to install apps without needing the command line. To install, run:</text> <code></code> <text>Note: Ubuntu distributes GNOME Software as a Snap in versions 20.04 to 23.04, and replaced it with App Center in 23.10 and newer—neither of which support installing Flatpak apps. Installing the Flatpak plugin will also install a deb version of GNOME Software, resulting in two "Software" apps being installed at the same time on Ubuntu 20.04 to 23.04, and a single new "Software" app on Ubuntu 23.10 and newer.</text>

<text>To install Flatpak on Void Linux, run the following in a terminal:</text> <code></code>

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