The best open source alternative to Ferdium is Beeper. If that doesn't suit you, our users have ranked more than 25 alternatives to Ferdium and 17 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Ferdium are Station, Franz, Freeter and ElectronIM.
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.
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.
The smartest way to work on your computer. Freeter is a productivity app that allows you to gather everything you need for work in one place, organized by projects and workflows, and have a quick access to them.
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.
Hamsket is a fork of Rambox that was started when Rambox moved from being totally free to a "freemium" model.
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.
Bridges between a growing number of protocols: mattermost, IRC, gitter, xmpp, slack, discord, telegram, rocketchat, steam, twitch, ssh-chat, zulip, whatsapp, keybase, matrix, microsoft teams, and more with REST API (mattermost not required!).
Quick Web Apps written with love and libcosmic. Turn Any URL into a Web App, running in a separate window of any browser installed on your system, selected according to your preference. Integrates with your desktop environment (icon pinnable to the dock).
Chatter is a centralized platform for chat apps, ensuring privacy and automatic login. Supports WhatsApp, Discord, Microsoft Teams, Telegram, Snapchat, WeChat, and more. Built on Tauri framework requiring Node.js and NPM, offering a seamless multiple chat experience.
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Beeper is the best messenger aggregation application, that provides totally different approach than other apps: it connects to other messengers on the cloud side, providing the aggregated list of messages from all your messengers in a single window!