Pidgin is described as 'Chat program which lets you log into accounts on multiple chat networks simultaneously. This means that you can be chatting with friends on XMPP and sitting in an IRC channel at the same time' and is a leading instant messenger in the social & communications category. There are more than 100 alternatives to Pidgin for a variety of platforms, including Linux, Mac, Windows, Web-based and BSD apps. The best Pidgin alternative is Element. It's not free, so if you're looking for a free alternative, you could try Element or Matrix. Other great apps like Pidgin are Jami, Beeper, SeaMonkey and Element X.
Subway is a web-based IRC client with a multi-user backend and a JavaScript-heavy UI. Frontend/backend communication is done with websockets (or best available fallback where not available). The backend supports connection persistence and optional logging when the browser...
Conduit is a simple, fast and reliable chat server powered by Matrix. Conduit is an alternative to Synapse and tries to be lightweight and easy to install, but it is still in development.
monocles chat is a fork of blabber.im and Conversations with some changes, to improve usability.
A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely. More friendly than other webirc clients giving the general public an easy option to connect to any IRC network.
Technitium Mesh is a secure, anonymous, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. Primary aim of developing this instant messenger is to provide privacy which is achieved using cryptography and anonymity using Tor network.
Caprine is an unofficial and privacy focused Facebook Messenger app with many useful features.
Swift is an elegant, secure, adaptable and intuitive XMPP client, with features that make it suitable for a wide range of use scenarios.
Secure team messaging platform with organized topic-based conversations, real-time collaboration on Docs, Sheets, Slides, integrated calendar scheduling, one-click meetings, shared tasks and files, Google Workspace support, admin controls, compliance, and advanced search.
One app for all your communication services! Use messengers like WhatsApp, Telegram, Messenger, Skype, Gmail and many more in one app!.
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Facebook Messenger only, unlike Pidgin which works with many other systems.