Stack Alternatives for Linux

Pidgin is a free and open-source multi-protocol instant messaging client designed to connect users across various chat networks with a single application. It's highly extensible through plugins and supports a wide range of protocols including XMPP, ICQ, and IRC.

Trillian is a versatile, multi-protocol instant messaging client that unifies various communication platforms like IRC, XMPP, and more into a single, user-friendly interface. It's designed for both personal and team collaboration, offering features like encrypted chats, group collaboration tools, and extensive customization options.

Jitsi is a free and open-source suite of secure, flexible communication tools. It offers multi-platform support for voice (VoIP), video conferencing, and instant messaging, emphasizing privacy and ease of use with no account required to start a meeting.

Empathy is a versatile multi-protocol messaging client designed for text, voice, and video communication across numerous IM networks. It offers features like file transfers, location sharing, and integration with various services, providing a unified communication experience.

Franz is a free, open-source application that consolidates multiple messaging and chat services into a single, convenient interface. It allows users to manage conversations across platforms like WhatsApp, Telegram, Slack, and more without switching between different apps.

Station is a powerful, open-source application aggregator and web browser designed to streamline access to all your web services in one unified interface. It provides a dedicated workspace for productivity, integrating messaging, project management, email, and other web apps.

Psi+ is a robust, cross-platform XMPP/Jabber client tailored for users who prioritize control, privacy, and extensibility. As a development branch of the classic Psi client, it offers advanced features for secure and customizable instant messaging.

Rambox is a FOSS and portable messaging and emailing application that consolidates numerous web services into a single, convenient interface. It supports a wide array of communication and collaboration platforms, including popular chat, email, and social media services, offering a unified experience with features like unified inbox and notifications.

Firework is a versatile desktop application designed to consolidate various web-based services into a single, unified interface. It streamlines communication, productivity, and web application management by wrapping them into a native desktop experience, reducing tab clutter and enhancing workflow efficiency across multiple platforms.

Finch is a versatile, command-line based instant messaging client that leverages the Pidgin network libraries. It supports multiple protocols like AIM, Jabber, MSN, Yahoo!, IRC, and more, providing a text-only interface for users who prefer the efficiency and minimalism of the console environment.

Singlebox is a lightweight, cross-platform desktop application that streamlines your digital communication by consolidating various web-based services into a single, unified interface. It acts as a multi-messenger and web application wrapper, offering a clean, privacy-focused environment for services like WhatsApp, Telegram, Slack, Gmail, and many more, improving productivity and reducing tab clutter.