Vacuum-IM is described as 'Crossplatform Jabber client. The core program is just a plugin loader - all functionality is made available via plugins. This enforces modularity and ensures well defined component interaction via interfaces' and is a instant messenger in the social & communications category. There are six alternatives to Vacuum-IM for a variety of platforms, including Linux, Mac, Windows, BSD and Flathub apps. The best Vacuum-IM alternative is Pidgin, which is both free and Open Source. Other great apps like Vacuum-IM are Empathy, Gajim, YakYak and Beagle IM.
Pidgin is a 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.
Pidgin is the most popular Windows, Mac & Linux alternative to Vacuum-IM.
Pidgin is the most popular Open Source & free alternative to Vacuum-IM.
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.
The goal of Gajim is to provide a full featured and easy to use XMPP client. Gajim works nicely with GNOME, but does not require it to run. It is released under the GNU General Public License.
BeagleIM is a lightweight and powerful XMPP client developed by Tigase, Inc. It provides an easy way to start using the XMPP Protocol (formerly known as Jabber) if you've never used it before. Veterans of the protocol will find many features here they are familiar.
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