
Gajim is a free and open-source instant messaging client that's available for both Linux and Windows operating systems. It's a great alternative to other popular messaging apps.
Gajim supports the XMPP protocol, which is an open standard for instant messaging. This means that you can use Gajim to communicate with friends and family who use other XMPP clients.
One of the best things about Gajim is its user-friendly interface, which makes it easy to get started with even if you're not tech-savvy.
For another approach, see: Comparison of Instant Messaging Protocols
Getting Started
Gajim is a free and open-source Jabber/XMPP client that's easy to use and customize. It's available for Windows, macOS, and Linux.
To get started with Gajim, you'll need to download and install the software from the official website. You can find the download links for your operating system on the Gajim website.
Gajim supports multiple protocols, including Jabber, XMPP, and even OTR encryption. This means you can stay connected with friends and family across different platforms.
Worth a look: XMPP
Installation

To install the software, you'll need to download the installation package from the official website. This package is available for both Windows and macOS operating systems.
First, make sure your computer meets the minimum system requirements, which are a 2.0 GHz processor, 4 GB of RAM, and a 10 GB free hard drive space.
The installation process is relatively straightforward and can be completed in a few steps.
You'll need to create a new account on the software's website to obtain a license key, which is required for activation. This key will be sent to your email address within 24 hours of account creation.
The installation package is a self-extracting executable file that will automatically install the software and its dependencies.
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Runtime Requirements
To get started, you'll need to meet the runtime requirements. The good news is that these requirements are well-documented, so you can easily check if you're good to go.
First and foremost, you'll need to have Python 3.11 or later installed. This is a standard requirement, so if you're using a recent version of Python, you're likely already set.

You'll also need to install several libraries, including libadwaita, cairo, and cryptography. The minimum version required for these libraries is 1.7.0, 1.16.0, and 3.4.8, respectively.
Here's a list of the required libraries and their minimum versions:
- libadwaita (>=1.7.0)
- cairo (>=1.16.0)
- cryptography (>=3.4.8)
- css-parser
- emoji (>=2.6.0)
- GLib (>=2.80.0)
- Gtk4 (>=4.17.5)
- GtkSourceView5
- keyring
- nbxmpp (>=6.3.0)
- omemo-dr (>=1.0.0)
- packaging
- httpx
- Pango (>=1.50.0)
- Pillow (>=9.1.0)
- precis_i18n
- pycairo
- PyGObject (>=3.52.0)
- qrcode (>=7.3.1)
- setuptools (>=65.0.0)
- SQLAlchemy (>=2.0.0)
- sqlite (>=3.35.0)
- truststore
- pystray (Only on Windows)
- PyWinRT (Only on Windows)
- windows-toasts (Only on Windows)
These libraries are all crucial for getting your project up and running smoothly. Take your time to install them, and don't hesitate to reach out if you have any questions or need further assistance.
Core Features
Gajim is a fully-featured XMPP client that's easy to use.
Gajim uses GTK (PyGObject) as its GUI library, making it cross-platform compatible.
Gajim supports group chat, which is perfect for team collaboration or socializing with friends.
Here are some of Gajim's notable features:
- Group chat support
- Emojis, Avatars, File transfer
- TLS, OpenPGP and end-to-end encryption support
- Transport Registration support
- Service Discovery including Nodes
- Multiple accounts support
- OMEMO encryption
- HTTP file upload
Features
Gajim is a fully-featured XMPP client that's easy to use and navigate. It's available in multiple languages, including English, French, German, Italian, and many others.
Gajim's GUI library is GTK (PyGObject), which makes it cross-platform compatible. This means you can use it on different operating systems without worrying about compatibility issues.

Some of Gajim's notable features include group chat support, emojis, and avatars. You can also transfer files and use a systray icon for easy access.
Gajim supports various encryption methods, including TLS, OpenPGP, and end-to-end encryption. This ensures your conversations remain private and secure.
Here are some of Gajim's key features:
- Group chat support
- Emojis, Avatars, File transfer
- Systray icon, Spell checking
- TLS, OpenPGP and end-to-end encryption support
- Transport Registration support
- Service Discovery including Nodes
- Wikipedia, dictionary and search engine lookup
- Multiple accounts support
- D-Bus Capabilities
- XML Console
- OMEMO encryption
- HTTP file upload
Message History
Message History is a valuable feature that allows you to save and review your conversations.
If you enable Save of Message History, a SQLite database file is created at ~/.local/share/gajim/logs.db.
This file can be opened with DB Browser for SQLite or sqlitebrowser, giving you access to a wealth of information about your conversations.
To search for a specific message, first look up the jid_id of the contact in the table jids, which can be found in the "Search Data" tab.
Then, run the SQL statement "SELECT * FROM messages WHERE jid_id = ?" in the "Run SQL" tab, replacing ? with the actual jid_id.
The result will be a list of your messages, ordered by time, with a column indicating whether the message was sent (Code: 6) or received (Code: 4).
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Customization
Customization is a breeze with Gajim. You can access the configuration menu from the top left dropdown or by using the Ctrl+p shortcut.
Gajim's configuration categories are divided into six main sections: General, Chats, Notification, Status, Style, and Audio/Video. Each section offers a range of settings to customize your experience.
The General section allows you to set how the client behaves when closed, while the Chats section lets you disable status change notifications and join/leave messages. The Notification section is where you can enable or disable audible notifications.
Here's a breakdown of the configuration categories:
Gajim also supports various third-party plugins, which can be found on an official list.
Configuration
Customizing Gajim's configuration is a breeze, and it's all done through the user-friendly interface. You can access the preferences menu via the top left Gajim dropdown or by pressing Ctrl+p.
The preferences menu is divided into several categories, each with its own set of settings. One of the main categories is General, where you can configure the client's behavior, such as what happens when the application is closed.
You can also customize the chat windows, including options to disable status change notifications or join/leave messages. This is all found under the Chats category.
Notification settings are also available, allowing you to enable or disable audible notifications. This is a great feature for those who prefer a more subtle experience.
The Status category is where you can configure automatic status changes, such as changing your status when you've been inactive for a certain period of time.
Gajim also offers a Style category, where you can configure the client theme to suit your taste.
If you're interested in more advanced settings, the Advanced category is where you'll find them. Here, you can purge message history, change client proxy settings, and even enable or disable debug logging.
Here's a breakdown of the configuration categories:
- General: General behaviour of the client, such as how it should behave when closed.
- Chats: General behaviour of chat windows, such as allowing you to disable status change notifications, or join/leave messages.
- Notification: General behaviour of notifications within the client, allowing you to enable/disable audible notifications.
- Status: General configuration of notifications, such as automatic status changes invoked by events such as inactivity for a certain period of time.
- Style: Configuration of the client theme.
- Audio/Video: Configuration of Audio and Video call support, such as NAT traversal and input devices (microphone and camera).
- Advanced: Settings aimed towards more advanced users, allowing purging of message history, changing client proxy settings, and enabling/disabling debug logging
Plugins
Plugins are a great way to customize Gajim to fit your needs. Gajim supports various third-party plugins.
You can load and manage dozens of extensions directly in Gajim via the Plugin Manager. The Plugin Manager is a convenient feature that allows you to easily install and configure plugins.

Some recommended extensions for new installations include OMEMO and "Message Box size". OMEMO provides secure multi-client and end-to-end encryption, while "Message Box size" lets you adjust the height of the text input field for new messages.
You can make settings for extensions directly in the "Plugins" section, rather than through the Gajim settings. For example, with OMEMO, you can view your own keys or the keys of your contacts in the "OMEMO" plugin.
Omemo Support
Gajim's OMEMO support is a game-changer for secure communication. OMEMO is an open standard based on Axolotl and PEP.
Gajim implemented OMEMO as an XMPP Extension Protocol (XEP) for secure multi-client end-to-end encryption. This means you can have peace of mind knowing your messages are encrypted and protected.
OMEMO provides end-to-end encryption, ensuring only you and the intended recipient can read the messages.
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Third Party Integration
Gajim's third-party plugin support is a major advantage, allowing users to extend its functionality with a wide range of add-ons.

You can find an official list of supported plugins, which is a great starting point for exploring the various options available.
Gajim's plugin system is quite flexible, enabling users to customize their experience to suit their needs.
From what I've seen, users can choose from a variety of plugins, each designed to enhance specific aspects of the Gajim interface.
One of the benefits of using third-party plugins is that they can add new features without requiring a full update of the Gajim software.
By leveraging these plugins, users can tap into a broader range of capabilities, making Gajim an even more powerful and versatile tool.
Frequently Asked Questions
Is Gajim open source?
Yes, Gajim is open source software, developed and maintained by a community of volunteers. It's built using open technologies like Python and GTK.
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