Based on our record, HexChat seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.
You can use KVirc, HexChat or like me Xchat-SE. The latter two are both freeware forks of Xchat, which used to be my long-term favorite client, albeit shareware. Nowadays, HexChat is probably the most popular choice but I prefer Xchat-SE because it almost identical to the original application yet it's regularly updated and boasts pretty much the same rich set of features. - Source: Reddit / about 2 months ago
I've historically used KVIrc a lot. HexChat is also a popular one. Both will require the user to enter the server details (though you could create a patched version which doesn't) and probably also require installation (I faintly remember using a third party portable Version of KVIrc, but I'm not sure anymore). On mobile phones the situation is different. For Android I've used Atomic a couple of years ago. - Source: Reddit / 7 months ago
irssi - Irssi is a terminal based IRC client for UNIX systems.
Pidgin - Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.
KVIrc - KVIrc is a free portable IRC client based on the excellent Qt GUI toolkit.
WeeChat - WeeChat is a fast, light and extensible chat client.
Kiwi IRC - A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely.
Quassel IRC - Quassel IRC is a modern, cross-platform, distributed IRC client based on the Qt4 framework.