Ferdi is described as 'Desktop app that helps you organize how you use your favourite apps by combining them into one application. It is based on Franz - a software already used by thousands of people - with the difference that Ferdi gives you many' and is a popular instant messenger in the social & communications category. There are more than 25 alternatives to Ferdi for a variety of platforms, including Mac, Windows, Linux, Android and iPhone apps. The best Ferdi alternative is Beeper, which is both free and Open Source. Other great apps like Ferdi are Ferdium, Station, Rambox and Franz.
Brings together messaging from 14 networks into a single inbox, including WhatsApp, Telegram, Slack, and more, with strong privacy via on-device connections, cross-platform availability, chat reminders, scheduling, and unified notifications for all devices.
Station is the first open-source smart browser for busy people. A single place for all of your web applications.
A digital workspace organizer that allows you to unify as many applications as you want, all in one place. It is perfect for those who care about productivity while working with many business and personal apps.
Centralize multiple chat and messaging services in one customizable interface, organize workspaces, receive synchronized notifications, manage multiple accounts per service, and easily access popular platforms on Mac, Windows, and Linux. Privacy controls included.
Free open source Electron based multi instant messaging (IM) client.
Combine all your IM applications (or whatever you want) in a single browser (Electron) window.
No need to create a user account
Completely free alternative
Ripcord is a desktop chat client for group-centric services like Slack and Discord. It provides a traditional compact desktop interface designed for power users. It's not built on top of web browser technology: it responds quickly to input, sips gently from computer...
Super fast, native app (does not need as much memory as Electron Apps).
Empathy is a messaging program which supports text, voice, video chat, and file transfers over many different protocols. You can tell it about your accounts on all those services and do all your chatting within one application.
Productivity browser featuring unified webmail, website, and web app management, isolated multi-account support, vertical sidebar with grouping, memory-saving tab sleeping, app-to-app linking, built-in chat and screenshare, collaboration workspaces, and strong security.
Hamsket is a fork of Rambox that was started when Rambox moved from being totally free to a "freemium" model.
One app for all your messaging.
WhatsApp, Messenger, Telegram, Skype, Zoom, Google Hangouts, Gmail, Slack, Facebook, Facebook Pages, Instagram, Twitter, Outlook, SnapMap, WeChat, LinkedIn, HipChat, and ChatWork.
Kopete is an instant messenger supporting AIM, ICQ, Jabber, Gadu-Gadu, Novell GroupWise Messenger, and more. It is designed to be a flexible and extensible multi-protocol system suitable for personal and enterprise use.
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Ferdium is a drop in replacement for Ferdi which I needed since Ferdi was discontinued.
Plus Ferdium allow local accounts so you do not need to be dependent to a cloud service that can be discontinued.